Published: 02-Oct-2019

2019.0 Range Rover Velar (LY), 100-00

General Information

Diagnostic Trouble Code Index - DTC: Headlamp Control Module (HCM) (G2261158)

DESCRIPTION AND OPERATION

Headlamp Control Module (HCM)

CAUTION:

Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not guarantee confirmation of a fault, and may also cause additional faults in the vehicle being tested and/or the donor vehicle

NOTES:

Guided Diagnostics must be followed and the repair advised by the process completed. Failure to do so may result in the rejection of any warranty claim made.

If the control module or a component is suspect and the vehicle remains under manufacturer warranty, refer to the Warranty Policy and Procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new module/component

Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5 digits from the scan tool to the first 5 digits of the 7-digit code listed to identify the fault (the last 2 digits give extra information read by the Jaguar Land Rover approved diagnostic equipment)

When performing voltage or resistance tests, always use a digital multimeter that has the resolution ability to view 3 decimal places. For example, on the 2 volts range can measure 1mV or 2 K Ohm range can measure 1 Ohm. When testing resistance always take the resistance of the digital multimeter leads into account

Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests

Inspect connectors for signs of water ingress, and pins for damage and/or corrosion

If diagnostic trouble codes are recorded and, after performing the pinpoint tests, a fault is not present, an intermittent concern may be the cause. Always check for loose connections and corroded terminals

Where an 'on demand self-test' is referred to, this can be accessed via the 'diagnostic trouble code monitor' tab on the Jaguar Land Rover approved diagnostic equipment

Check JLR claims submission system for open campaigns. Refer to the corresponding bulletins and SSMs which may be valid for the specific customer complaint and carry out the recommendations as required.

The table below lists all diagnostic trouble codes (DTCs) that could be logged in the headlamp control module, for additional diagnosis and testing information refer to the relevant diagnosis and testing Section. For additional information, refer to: Headlamp Leveling (417-01 Exterior Lighting, Diagnosis and Testing).

DTC Description Possible Causes Action

B103C-49 Left Headlamp Control - Internal electronic failure

Left headlamp assembly internal failure

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B103D-49 Right Headlamp Control - Internal electronic failure

Right headlamp assembly internal failure

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B1041-54 Leveling Control - Missing calibration

Headlamp leveling calibration routine has not been run successfully

NOTE:

Sensor calibration routine must be carried out with the vehicle unladen and with correct tire pressures

Rectify any headlamp related DTCs first. Using the Jaguar Land Rover approved diagnostic equipment, run the diagnostic routine - Calibrate Leveling Sensors (0x200D)

B1087-31 LIN Bus "A" - No signal

LIN bus circuit short circuit to ground, open circuit high resistance

Refer to the electrical circuit diagrams and check the LIN bus circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest

B1087-81 LIN Bus "A" - Invalid serial data received

LIN bus circuit short circuit to ground, open circuit high resistance

Refer to the electrical circuit diagrams and check the LIN bus circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest

B10AE-01 Headlamp Leveling Motor - General electrical failure

Left headlamp leveling motor error

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new headlamp control module

B10AE-4B Headlamp Leveling Motor - Over temperature

Headlamp leveling motor internal temperature above threshold

Check that the headlamp internal movement is not obstructed

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new headlamp control module

B10F3-11 Left front position light - Circuit short to ground

Front left side lamp circuit short circuit to ground

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front left side lamp circuit for short circuit to ground. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B10F3-12 Left front position light - Circuit short to battery

Front left side lamp circuit short circuit to power

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front left side lamp circuit for short circuit to power. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B10F3-13 Left front position light - Circuit open

Front left side lamp circuit open circuit, high resistance

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front left side lamp circuit for open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B10F3-16 Left front position light - Circuit voltage below threshold

Front left side lamp circuit short circuit to ground, short circuit to power, open circuit, high resistance

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front left side lamp circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B10F3-19 Left front position light - Circuit current above threshold

Front left side lamp circuit short circuit to ground, short circuit to power, open circuit, high resistance

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front left side lamp circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B10F3-4B Left front position light - Over temperature

Front left side lamp internal circuits are overheated

Left headlamp assembly internal failure

Allow the system to cool. Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B10F4-11 Right front position light - Circuit short to ground

Front right side lamp circuit short circuit to ground

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front right side lamp circuit for short circuit to ground. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B10F4-12 Right front position light - Circuit short to battery

Front right side lamp circuit short circuit to power

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front right side lamp circuit for short circuit to power. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B10F4-13 Right front position light - Circuit open

Front right side lamp circuit open circuit, high resistance

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front right side lamp circuit for open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B10F4-16 Right front position light - Circuit voltage below threshold

Front right side lamp circuit short circuit to ground, short circuit to power, open circuit, high resistance

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front right side lamp circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B10F4-19 Right front position light - Circuit current above threshold

Front right side lamp circuit short circuit to ground, short circuit to power, open circuit, high resistance

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front right side lamp circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B10F4-4B Right front position light - Over temperature

Front right side lamp internal circuits are overheated

Right headlamp assembly internal failure

Allow the system to cool. Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B123A-11 Left Front Turn Indicator - Circuit short to ground

Front left turn signal indicator circuit short circuit to ground

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front left turn signal indicator circuit for short circuit to ground. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B123A-12 Left Front Turn Indicator - Circuit short to battery

Front left turn signal indicator circuit short circuit to power

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front left turn signal indicator circuit for short circuit to power. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B123A-13 Left Front Turn Indicator - Circuit open

Front left turn signal indicator circuit open circuit, high resistance

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front left turn signal indicator circuit for open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B123A-16 Left Front Turn Indicator - Circuit voltage below threshold

Front left turn signal indicator circuit short circuit to ground, short circuit to power, open circuit, high resistance

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front left turn signal indicator circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B123A-19 Left Front Turn Indicator - Circuit current above threshold

Front left turn signal indicator circuit short circuit to ground, short circuit to power, open circuit, high resistance

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front left turn signal indicator circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B123A-4B Left Front Turn Indicator - Over temperature

Front left turn signal indicator internal circuits are overheated

Left headlamp assembly internal failure

Allow the system to cool. Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B123B-11 Right Front Turn Indicator - Circuit short to ground

Front right turn signal indicator circuit short circuit to ground

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front right turn signal indicator circuit for short circuit to ground. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B123B-12 Right Front Turn Indicator - Circuit short to battery

Front right turn signal indicator circuit short circuit to power

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front right turn signal indicator circuit for short circuit to power. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B123B-13 Right Front Turn Indicator - Circuit open

Front right turn signal indicator circuit open circuit, high resistance

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front right turn signal indicator circuit for open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B123B-16 Right Front Turn Indicator - Circuit voltage below threshold

Front right turn signal indicator circuit short circuit to ground, short circuit to power, open circuit, high resistance

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front right turn signal indicator circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B123B-19 Right Front Turn Indicator - Circuit current above threshold

Front right turn signal indicator circuit short circuit to ground, short circuit to power, open circuit, high resistance

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front right turn signal indicator circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B123B-4B Right Front Turn Indicator - Over temperature

Front right turn signal indicator internal circuits are overheated

Right headlamp assembly internal failure

Allow the system to cool. Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B124A-11 Right Daytime Running Light - Circuit short to ground

Right side daytime running light circuit short circuit to ground

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the right side daytime running light circuit for short circuit to ground. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B124A-12 Right Daytime Running Light - Circuit short to battery

Right side daytime running light circuit short circuit to power

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the right side daytime running light circuit for short circuit to power. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B124A-13 Right Daytime Running Light - Circuit open

Right side daytime running light circuit open circuit, high resistance

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the right side daytime running light circuit for open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B124A-16 Right Daytime Running Light - Circuit voltage below threshold

Right side daytime running light circuit short circuit to ground, short circuit to power, open circuit, high resistance

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the right side daytime running light circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B124A-19 Right Daytime Running Light - Circuit current above threshold

Right side daytime running light circuit short circuit to ground, short circuit to power, open circuit, high resistance

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the right side daytime running light circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B124A-4B Right Daytime Running Light - Over temperature

Right side daytime running light internal circuits are overheated

Right headlamp assembly internal failure

Allow the system to cool. Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B124B-11 Left Daytime Running Light - Circuit short to ground

Left side daytime running light circuit short circuit to ground

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the left side daytime running light circuit for short circuit to ground. Repair circuit as required, clear the DTCs and retest

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B124B-12 Left Daytime Running Light - Circuit short to battery

Left side daytime running light circuit short circuit to power

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the left side daytime running light circuit for short circuit to power. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B124B-13 Left Daytime Running Light - Circuit open

Left side daytime running light circuit open circuit, high resistance

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the left side daytime running light circuit for open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B124B-16 Left Daytime Running Light - Circuit voltage below threshold

Left side daytime running light circuit short circuit to ground, short circuit to power, open circuit, high resistance

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the left side daytime running light circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B124B-19 Left Daytime Running Light - Circuit current above threshold

Left side daytime running light circuit short circuit to ground, short circuit to power, open circuit, high resistance

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the left side daytime running light circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B124B-4B Left Daytime Running Light - Over temperature

Left side daytime running light internal circuits are overheated

Left headlamp assembly internal failure

Allow the system to cool. Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B12FE-11 Fan - Circuit short to ground

Fan control circuit short circuit to ground

Refer to the electrical circuit diagrams and check the fan control circuit for short circuit to ground. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new fan assembly

B12FE-12 Fan - Circuit short to battery

Fan control circuit short circuit to power

Refer to the electrical circuit diagrams and check the fan control circuit for short circuit to power. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new fan assembly

B12FE-13 Fan - Circuit open

Fan control circuit open circuit, high resistance

Refer to the electrical circuit diagrams and check the fan control circuit for open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new fan assembly

B146B-11 Left Front Side Marker Lamp - Circuit short to ground

Front left side marker lamp circuit short circuit to ground

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front left side marker lamp circuit for short circuit to ground

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B146B-12 Left Front Side Marker Lamp - Circuit short to battery

Front left side marker lamp circuit short circuit to power

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front left side marker lamp circuit for short circuit to power. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B146B-13 Left Front Side Marker Lamp - Circuit open

Front left side marker lamp circuit open circuit, high resistance

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front left side marker lamp circuit for open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B146B-16 Left Front Side Marker Lamp - Circuit voltage below threshold

Front left side marker lamp circuit short circuit to ground, short circuit to power, open circuit, high resistance

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front left side marker lamp circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B146B-19 Left Front Side Marker Lamp - Circuit current above threshold

Front left side marker lamp circuit short circuit to ground, short circuit to power, open circuit, high resistance

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front left side marker lamp circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B146B-4B Left Front Side Marker Lamp - Over temperature

Front left side marker lamp internal circuits are overheated

Left headlamp assembly internal failure

Allow the system to cool. Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B146C-11 Right Front Side Marker Lamp - Circuit short to ground

Front right side marker lamp circuit short circuit to ground

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front right side marker lamp circuit for short circuit to ground

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B146C-12 Right Front Side Marker Lamp - Circuit short to battery

Front right side marker lamp circuit short circuit to power

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front right side marker lamp circuit for short circuit to power. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B146C-13 Right Front Side Marker Lamp - Circuit open

Front right side marker lamp circuit open circuit, high resistance

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front right side marker lamp circuit for open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B146C-16 Right Front Side Marker Lamp - Circuit voltage below threshold

Front right side marker lamp circuit short circuit to ground, short circuit to power, open circuit, high resistance

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front right side marker lamp circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B146C-19 Right Front Side Marker Lamp - Circuit current above threshold

Front right side marker lamp circuit short circuit to ground, short circuit to power, open circuit, high resistance

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the front right side marker lamp circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B146C-4B Right Front Side Marker Lamp - Over temperature

Front right side marker lamp internal circuits are overheated

Right headlamp assembly internal failure

Allow the system to cool. Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B1C98-11 Left Corner Lamp Circuit - Circuit short to ground

Left side cornering lamp circuit short circuit to ground

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the left side cornering lamp circuit for short circuit to ground

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B1C98-12 Left Corner Lamp Circuit - Circuit short to battery

Left side cornering lamp circuit short circuit to power

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the left side cornering lamp circuit for short circuit to power. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B1C98-13 Left Corner Lamp Circuit - Circuit open

Left side cornering lamp circuit open circuit, high resistance

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the left side cornering lamp circuit for open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B1C98-16 Left Corner Lamp Circuit - Circuit voltage below threshold

Left side cornering lamp circuit short circuit to ground, short circuit to power, open circuit, high resistance

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the left side cornering lamp circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B1C98-19 Left Corner Lamp Circuit - Circuit current above threshold

Left side cornering lamp circuit short circuit to ground, short circuit to power, open circuit, high resistance

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the left side cornering lamp circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B1C98-4B Left Corner Lamp Circuit - Over temperature

Left side cornering lamp internal circuits are overheated

Left headlamp assembly internal failure

Allow the system to cool. Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B1C99-11 Right Corner Lamp Circuit - Circuit short to ground

Right side cornering lamp circuit short circuit to ground

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the right side cornering lamp circuit for short circuit to ground

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B1C99-12 Right Corner Lamp Circuit - Circuit short to battery

Right side cornering lamp circuit short circuit to power

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the right side cornering lamp circuit for short circuit to power. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B1C99-13 Right Corner Lamp Circuit - Circuit open

Right side cornering lamp circuit open circuit, high resistance

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the right side cornering lamp circuit for open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B1C99-16 Right Corner Lamp Circuit - Circuit voltage below threshold

Right side cornering lamp circuit short circuit to ground, short circuit to power, open circuit, high resistance

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the right side cornering lamp circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B1C99-19 Right Corner Lamp Circuit - Circuit current above threshold

Right side cornering lamp circuit short circuit to ground, short circuit to power, open circuit, high resistance

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the right side cornering lamp circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B1C99-4B Right Corner Lamp Circuit - Over temperature

Right side cornering lamp internal circuits are overheated

Right headlamp assembly internal failure

Allow the system to cool. Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B1D00-11 Left Low Beam - Circuit short to ground

Left headlamp low beam circuit short circuit to ground

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the left headlamp low beam circuit for short circuit to ground

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B1D00-12 Left Low Beam - Circuit short to battery

Left headlamp low beam circuit short circuit to power

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the left headlamp low beam circuit for short circuit to power. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B1D00-13 Left Low Beam - Circuit open

Left headlamp low beam circuit open circuit, high resistance

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the left headlamp low beam circuit for open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B1D00-16 Left Low Beam - Circuit voltage below threshold

Left headlamp low beam circuit short circuit to ground, short circuit to power, open circuit, high resistance

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the left headlamp low beam circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B1D00-19 Left Low Beam - Circuit current above threshold

Left headlamp low beam circuit short circuit to ground, short circuit to power, open circuit, high resistance

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the left headlamp low beam circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B1D00-4B Left Low Beam - Over temperature

Left headlamp low beam internal circuits are overheated

Left headlamp assembly internal failure

Allow the system to cool. Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B1D01-11 Right Low Beam - Circuit short to ground

Right headlamp low beam circuit short circuit to ground

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the right headlamp low beam circuit for short circuit to ground

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B1D01-12 Right Low Beam - Circuit short to battery

Right headlamp low beam circuit short circuit to power

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the right headlamp low beam circuit for short circuit to power. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B1D01-13 Right Low Beam - Circuit open

Right headlamp low beam circuit open circuit, high resistance

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the right headlamp low beam circuit for open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B1D01-16 Right Low Beam - Circuit voltage below threshold

Right headlamp low beam circuit short circuit to ground, short circuit to power, open circuit, high resistance

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the right headlamp low beam circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B1D01-19 Right Low Beam - Circuit current above threshold

Right headlamp low beam circuit short circuit to ground, short circuit to power, open circuit, high resistance

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the right headlamp low beam circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B1D01-4B Right Low Beam - Over temperature

Right headlamp low beam internal circuits are overheated

Right headlamp assembly internal failure

Allow the system to cool. Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B1D02-11 Left High Beam Circuit - Circuit short to ground

Left headlamp high beam circuit short circuit to ground

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the left headlamp high beam circuit for short circuit to ground

B1D02-12 Left High Beam Circuit - Circuit short to battery

Left headlamp high beam circuit short circuit to power

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the left headlamp high beam circuit for short circuit to power. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B1D02-13 Left High Beam Circuit - Circuit open

Left headlamp high beam circuit open circuit, high resistance

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the left headlamp high beam circuit for open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B1D02-16 Left High Beam Circuit - Circuit voltage below threshold

Left headlamp high beam circuit short circuit to ground, short circuit to power, open circuit, high resistance

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the left headlamp high beam circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B1D02-19 Left High Beam Circuit - Circuit current above threshold

Left headlamp high beam circuit short circuit to ground, short circuit to power, open circuit, high resistance

Left headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the left headlamp high beam circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B1D02-4B Left High Beam Circuit - Over temperature

Left headlamp high beam internal circuits are overheated

Left headlamp assembly internal failure

Allow the system to cool. Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new left headlamp assembly

B1D03-11 Right High Beam Circuit - Circuit short to ground

Right headlamp high beam circuit short circuit to ground

Refer to the electrical circuit diagrams and check the right headlamp high beam circuit for short circuit to ground

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B1D03-12 Right High Beam Circuit - Circuit short to battery

Right headlamp high beam circuit short circuit to power

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the right headlamp high beam circuit for short circuit to power. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B1D03-13 Right High Beam Circuit - Circuit open

Right headlamp high beam circuit open circuit, high resistance

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the right headlamp high beam circuit for open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B1D03-16 Right High Beam Circuit - Circuit voltage below threshold

Right headlamp high beam circuit short circuit to ground, short circuit to power, open circuit, high resistance

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the right headlamp high beam circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B1D03-19 Right High Beam Circuit - Circuit current above threshold

Right headlamp high beam circuit short circuit to ground, short circuit to power, open circuit, high resistance

Right headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the right headlamp high beam circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuits as required

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

B1D03-4B Right High Beam Circuit - Over temperature

Right headlamp high beam internal circuits are overheated

Right headlamp assembly internal failure

Allow the system to cool. Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new right headlamp assembly

C1A03-12 Left Front Height Sensor - Circuit short to battery

Front left height sensor signal circuit short circuit to power

Using the Jaguar Land Rover Approved Diagnostic Equipment, check datalogger signal - Left Front Height Sensor (0x3B70). Incorrect high value above 4.8V

Refer to the electrical circuit diagrams and check the front left height sensor signal circuit for short circuit to power

C1A03-14 Left Front Height Sensor - Circuit short to ground or open

Front left height sensor signal circuit short circuit to ground, open circuit, high resistance

Using the Jaguar Land Rover Approved Diagnostic Equipment, check datalogger signal - Left Front Height Sensor (0x3B70). Incorrect low value below 0.2V

Refer to the electrical circuit diagrams and check the front left height sensor signal circuit for short circuit to ground, open circuit, high resistance

C1A04-12 Right Front Height Sensor - Circuit short to battery

Front right height sensor signal circuit short circuit to power

Using the Jaguar Land Rover Approved Diagnostic Equipment, check datalogger signal - Right Front Height Sensor (0x3B71). Incorrect high value above 4.8V

Refer to the electrical circuit diagrams and check the front right height sensor signal circuit for short circuit to power

C1A04-14 Right Front Height Sensor - Circuit short to ground or open

Front right height sensor signal circuit short circuit to ground, open circuit, high resistance

Using the Jaguar Land Rover Approved Diagnostic Equipment, check datalogger signal - Right Front Height Sensor (0x3B71). Incorrect low value below 0.2V

Refer to the electrical circuit diagrams and check the front right height sensor signal circuit for short circuit to ground, open circuit, high resistance

C1A05-12 Left Rear Height Sensor - Circuit short to battery

Rear left height sensor signal circuit short circuit to power

Using the Jaguar Land Rover Approved Diagnostic Equipment, check datalogger signal - Left Rear Height Sensor (0x3B72). Incorrect high value above 4.8V

Refer to the electrical circuit diagrams and check the rear left height sensor signal circuit for short circuit to power

C1A05-14 Left Rear Height Sensor - Circuit short to ground or open

Rear left height sensor signal circuit short circuit to ground, open circuit, high resistance

Using the Jaguar Land Rover Approved Diagnostic Equipment, check datalogger signal - Left Rear Height Sensor (0x3B72). Incorrect low value below 0.2V

Refer to the electrical circuit diagrams and check the rear left height sensor signal circuit for short circuit to ground, open circuit, high resistance

C1A06-12 Right Rear Height Sensor - Circuit short to battery

Rear right height sensor signal circuit short circuit to power

Using the Jaguar Land Rover Approved Diagnostic Equipment, check datalogger signal - Right Rear Height Sensor (0x3B73). Incorrect high value above 4.8V

Refer to the electrical circuit diagrams and check the rear right height sensor signal circuit for short circuit to power

C1A06-14 Right Rear Height Sensor - Circuit short to ground or open

Rear right height sensor signal circuit short circuit to ground, open circuit, high resistance

Using the Jaguar Land Rover Approved Diagnostic Equipment, check datalogger signal - Right Rear Height Sensor (0x3B73). Incorrect low value below 0.2V

Refer to the electrical circuit diagrams and check the rear right height sensor signal circuit for short circuit to ground, open circuit, high resistance

C1A68-11 Left Front Height Sensor Supply - Circuit short to ground

Front left height sensor supply circuit short circuit to power

Refer to the electrical circuit diagrams and check the front left height sensor supply circuit for short circuit to power

C1A68-12 Left Front Height Sensor Supply - Circuit short to battery

Front left height sensor supply circuit short circuit to ground, open circuit, high resistance

Refer to the electrical circuit diagrams and check the front left height sensor supply circuit for short circuit to ground, open circuit, high resistance

C1A69-11 Right Front Height Sensor Supply - Circuit short to ground

Front right height sensor supply circuit short circuit to power

Refer to the electrical circuit diagrams and check the front right height sensor supply circuit for short circuit to power

C1A69-12 Right Front Height Sensor Supply - Circuit short to battery

Front right height sensor supply circuit short circuit to ground, open circuit, high resistance

Refer to the electrical circuit diagrams and check the front right height sensor supply circuit for short circuit to ground, open circuit, high resistance

C1A70-11 Left Rear Height Sensor Supply - Circuit short to ground

Rear left height sensor supply circuit short circuit to power

Refer to the electrical circuit diagrams and check the rear left height sensor supply circuit for short circuit to power

C1A70-12 Left Rear Height Sensor Supply - Circuit short to battery

Rear left height sensor supply circuit short circuit to ground, open circuit, high resistance

Refer to the electrical circuit diagrams and check the rear left height sensor supply circuit for short circuit to ground, open circuit, high resistance

C1A71-11 Right Rear Height Sensor Supply - Circuit short to ground

Rear right height sensor supply circuit short circuit to power

Refer to the electrical circuit diagrams and check the rear right height sensor supply circuit for short circuit to power

C1A71-12 Right Rear Height Sensor Supply - Circuit short to battery

Rear right height sensor supply circuit short circuit to ground, open circuit, high resistance

Refer to the electrical circuit diagrams and check the rear right height sensor supply circuit for short circuit to ground, open circuit, high resistance

U0046-81 Vehicle Communication Bus C - Invalid serial data received

Unexpected data has been received via the high speed CAN network (chassis)

High speed CAN network (chassis) fault

Refer to the electrical circuit diagrams and check the power and ground connections to the module

Using the Jaguar Land Rover approved diagnostic equipment, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network

Using the Jaguar Land Rover approved diagnostic equipment, identify the module(s) responsible for the erroneous CAN signals. Check these modules for related DTCs and refer to the relevant DTC index

U0046-87 Vehicle Communication Bus C - Missing message

Unexpected data has been received via the high speed CAN network (chassis)

High speed CAN network (chassis) fault

Refer to the electrical circuit diagrams and check the power and ground connections to the module

Using the Jaguar Land Rover approved diagnostic equipment, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network

Using the Jaguar Land Rover approved diagnostic equipment, identify the module(s) responsible for the erroneous CAN signals. Check these modules for related DTCs and refer to the relevant DTC index

U0046-88 Vehicle Communication Bus C - Bus off

High speed CAN network (chassis) communication error

High speed CAN network (chassis) circuit short circuit to ground, short circuit to power, open circuit, high resistance

Refer to the electrical circuit diagrams and check the power and ground connections to the module

Using the Jaguar Land Rover approved diagnostic equipment, complete a CAN network integrity test. Repair circuits as required, clear the DTCs and retest

U0241-87 Lost Communication With Headlamp Control Module "A" - Missing message

Unexpected data has been received via the SUB-CAN network

SUB-CAN network fault

Refer to the electrical circuit diagrams and check the power and ground connections to the module

Using the Jaguar Land Rover approved diagnostic equipment, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the SUB-CAN network

U0242-87 Lost Communication With Headlamp Control Module "B" - Missing message

Unexpected data has been received via the SUB-CAN network

SUB-CAN network fault

Refer to the electrical circuit diagrams and check the power and ground connections to the module

Using the Jaguar Land Rover approved diagnostic equipment, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the SUB-CAN network

U0542-81 Invalid Data Received From Headlamp Control Module "A" - Invalid serial data received

Unexpected data has been received via the SUB-CAN network

SUB-CAN network fault

Refer to the electrical circuit diagrams and check the power and ground connections to the module

Using the Jaguar Land Rover approved diagnostic equipment, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the SUB-CAN network

U0543-81 Invalid Data Received From Headlamp Control Module "B" - Invalid serial data received

Unexpected data has been received via the SUB-CAN network

SUB-CAN network fault

Refer to the electrical circuit diagrams and check the power and ground connections to the module

Using the Jaguar Land Rover approved diagnostic equipment, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the SUB-CAN network

U200D-11 Control Module Output Power A - Circuit short to ground

Animated direction indicator circuit short circuit to ground

Refer to the electrical circuit diagrams and check the animated direction indicator circuit for short circuit to ground

Check internal harness connections

U200D-15 Control Module Output Power A - Circuit short to battery or open

Animated direction indicator circuit short circuit to power, open circuit, high resistance

Refer to the electrical circuit diagrams and check the animated direction indicator circuit for short circuit to power, open circuit, high resistance

Check internal harness connections

U200E-11 Control Module Output Power B - Circuit short to ground

Slave headlamp control module LIN circuit short circuit to ground

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new slave headlamp assembly

U200E-15 Control Module Output Power B - Circuit short to battery or open

Slave headlamp control module LIN circuit short circuit to power, open circuit, high resistance

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new slave headlamp assembly

U201A-51 Control Module Main Calibration Data - Not programmed

Headlamp control module is not configured correctly

Using the Jaguar Land Rover approved diagnostic equipment, re-configure the headlamp control module with the latest level software

U210A-11 Temperature Sensor - Circuit short to ground

Headlamp temperature sensor circuit short circuit to ground

Headlamp temperature sensor internal failure

Refer to the electrical circuit diagrams and check the headlamp temperature sensor circuit for short circuit to ground

Check internal harness connections

U210A-12 Temperature Sensor - Circuit short to battery

Headlamp temperature sensor circuit short circuit to power

Headlamp temperature sensor internal failure

Refer to the electrical circuit diagrams and check the headlamp temperature sensor circuit for short circuit to power

Check internal harness connections

U210A-13 Temperature Sensor - Circuit open

Headlamp temperature sensor circuit open circuit, high resistance

Headlamp temperature sensor internal failure

Refer to the electrical circuit diagrams and check the headlamp temperature sensor circuit for open circuit, high resistance

Check internal harness connections

U2300-56 Central Configuration - Invalid/incomplete configuration

Car configuration file mismatch with vehicle specification

NOTE:

After updating the car configuration file, set the ignition to on and wait 30 seconds before clearing the DTCs

Using the Jaguar Land Rover approved diagnostic equipment, check and up-date the car configuration file as necessary. Clear the DTCs and retest

U2301-88 Control Module Sub Network A - Bus off

SUB-CAN network communication error

SUB-CAN network circuit short circuit to ground, short circuit to power, open circuit, high resistance

Refer to the electrical circuit diagrams and check the power and ground connections to the module

Using the Jaguar Land Rover approved diagnostic equipment, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the SUB-CAN network

U3000-49 Control Module - Internal electronic failure

Headlamp assembly internal failure

Refer to the electrical circuit diagrams and check the power and ground circuits to the module. Check internal harness connections

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new slave headlamp assembly