Land Rover Discovery: Reversing Lamps
PRINCIPLES OF OPERATION
For a detailed description of the Reverse Lamps, refer to the relevant
Description and Operation section in the workshop manual. REFER to:
Exterior Lighting (417-01 Exterior Lighting, Description and Operation).
INSPECTION AND VERIFICATION
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:
- Verify the customer concern
- Visually inspect for obvious signs of damage and system integrity
Visual Inspection
- If an obvious cause for an observed or reported concern is found,
correct the cause (if possible) before proceeding to the next step
- If the cause is not visually evident, verify the symptom and refer to
the
Symptom Chart, alternatively check for Diagnostic Trouble Codes
(DTCs) and refer to the DTC Index
- Check DDW 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
SYMPTOM CHART
SYMPTOM:
Reverse
lamps(s)
inoperative
POSSIBLE CAUSE:
- Body system
fault
- Reverse
gear switch
signal circuit
short circuit
to power,
open circuit,
high
resistance
(manual
transmission)
- Transmission
system fault
(automatic
transmission)
- Reverse
lamp circuit
short circuit
to ground,
short circuit
to power,
open circuit,
high
resistance
ACTION:
- Using the Jaguar Land Rover approved diagnostic
equipment, check the central junction box for related
DTCs and refer to the relevant DTC index
- Manual transmission: Using the Jaguar Land Rover
approved diagnostic equipment, check the central
junction box for related DTCs and refer to the relevant
DTC index. Refer to the electrical circuit diagrams and
check the reverse gear switch signal circuit for short
circuit to power, open circuit, high resistance. Repair
the wiring harness or install a new reverse gear switch
as necessary
- Automatic transmission: Using the Jaguar Land Rover
approved diagnostic equipment, check the
transmission control module for related DTCs and refer
to the relevant DTC index
- Refer to the electrical circuit diagrams and check the
rear fog lamp circuit for short circuit to ground, short
circuit to power, open circuit, high resistance. Repair
the wiring harness or install a new reverse lamp bulb as
necessary
SYMPTOM:
Reverse
lamps(s)
dim
POSSIBLE CAUSE:
- Body system
fault
- Reverse
lamp bulb
incorrect
specification
- Reverse
lamp circuit
high
resistance
ACTION:
- Using the Jaguar Land Rover approved diagnostic
equipment, check the central junction box for related
DTCs and refer to the relevant DTC index
- Install a new reverse lamp bulb
- Refer to the electrical circuit diagrams and check the
reverse lamp circuit for high resistance. Repair the
wiring harness or install a new reverse lamp bulb as
necessary
SYMPTOM:
Reverse
lamps(s)
stuck on
POSSIBLE CAUSE:
- Body system
fault
- Reverse
gear switch
signal circuit
short circuit
to ground
(manual
transmission)
- Transmission
system fault
(automatic
transmission)
- Reverse
lamp circuit
short circuit
to power
ACTION:
- Using the Jaguar Land Rover approved diagnostic
equipment, check the central junction box for related
DTCs and refer to the relevant DTC index
- Manual transmission: Using the Jaguar Land Rover
approved diagnostic equipment, check the central
junction box for related DTCs and refer to the relevant
DTC index. Refer to the electrical circuit diagrams and
check the reverse gear switch signal circuit for short
circuit to ground. Repair the wiring harness or install a
new reverse gear switch as necessary
- Automatic transmission: Using the Jaguar Land Rover
approved diagnostic equipment, check the
transmission control module for related DTCs and refer
to the relevant DTC index
- Refer to the electrical circuit diagrams and check the
reverse lamp circuit for short circuit to power. Repair
the wiring harness as necessary
DTC INDEX
For a list of Diagnostic Trouble Codes (DTCs) that could be logged on this
vehicle, please refer to Section 100-00. REFER to: Diagnostic Trouble Code
Index - DTC: Central Junction Box (CJB) (100-00 General Information,
Description and Operation).
READ NEXT:
PRINCIPLES OF OPERATION
For a detailed description of the Stop Lamps, refer to the relevant
Description and Operation section in the workshop manual. REFER to:
Exterior Lighting (417-01 Exterior Light
PRINCIPLES OF OPERATION
For a detailed description of the Trailer Lamps, refer to the relevant
Description and Operation section in the workshop manual. REFER to:
Exterior Lighting (417-01 Exterior Li
PRINCIPLES OF OPERATION
For a detailed description of the Turn Signal and Hazard Lamps, refer to the
relevant Description and Operation section in the workshop manual. REFER
to: Exterior Lighting (417
SEE MORE:
If DTC B1252-19 (USB Port General Electrical Failures -
Circuit current above
threshold) has been logged, the IAM has detected a current draw from the
Portable Audio Interface Panel in excess of 1.7 Amps. In these
circumstances, the power supply to the Portable Audio Interface Panel will
be cut for
Removal
NOTES:
Some variation in the illustrations may occur, but the essential
information is always correct.
Removal steps in this procedure may contain installation details.
Disconnect the ground cable.
Refer to: Specifications (414-01, Specifications).
NOTE:
LH illustration shown, RH is