Land Rover Defender: Interior Lighting - Diagnosis and Testing
DIAGNOSIS AND TESTING
PRINCIPLE OF OPERATION
For a detailed description of the interior lighting system and operation, refer to the relevant description and operation section of the workshop manual. REFER to: Interior Lighting (Interior 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:
- If the control module or a component may be at fault and the vehicle remains under manufacturer warranty, refer to the Warranty Policy and Procedures manual (section B1.2), or determine if any prior approval program is in operation, prior to the installation of a new module/component.
- When performing voltage or resistance tests, always use a digital multimeter accurate to three decimal places, and with an up-to-date calibration certificate. When testing resistance, always take the resistance of the digital multimeter leads into account.
- Verify the customer concern
- Visually inspect for obvious signs of mechanical or electrical damage
Visual Inspection
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- 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 relevant DTC index
- 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 complete the recommendations as required
SYMPTOM CHART
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PINPOINT TESTS
PINPOINT TEST A : INTERIOR LAMP FUNCTION TESTS
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PINPOINT TEST B : AUTO MODE FUNCTION TESTS
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PINPOINT TEST C : BATTERY AND CHARGING SYSTEM TESTS
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PINPOINT TEST D : INTERIOR LAMP SIGNAL TESTS
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PINPOINT TEST E : FRONT INTERIOR LAMP TESTS
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PINPOINT TEST F : REAR LEFT INTERIOR LAMP TESTS
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PINPOINT TEST G : REAR RIGHT INTERIOR LAMP TESTS
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READ NEXT:
Second Row Interior Lamp
REMOVAL AND INSTALLATION
REMOVAL
NOTES:
Removal steps in this procedure may contain installation details.
Some variation in the illustrations may occur, but the essential
information is always co
Daytime Running Lamps - Description and Operation
DESCRIPTION AND OPERATION
OVERVIEW
Daytime Running Lamps (DRLs) are sections of the headlamps that illuminate to
make the vehicle more visible to
other road users. The DRLs help to identify the vehic
Daytime Running Lamps - Diagnosis and Testing
DIAGNOSIS AND TESTING
PRINCIPLES OF OPERATION
For a detailed description of the Daytime Running Lamps, refer to the
relevant Description and Operation section in
the workshop manual. REFER to: Daytim
SEE MORE:
MHEV Pass Through Assembly To Front Junction Box Cables
REMOVAL AND INSTALLATION
REMOVAL
CAUTION:
Do not allow the cables to hang unsupported.
NOTE:
This procedure contains some variation in the illustration depending
on the vehicle specification, but
essential information is always correct.
This procedure contains illustrations showing certain com
Gasoline engined vehicles
Use high quality fuel. Low quality fuel can
damage the engine and reduce engine
performance.
Do not use leaded fuels, fuels with lead
substitutes, e.g., manganese-based, or
fuel additives. The vehicle's emission
control systems can be adversely affected,
which may affect the vehicle's warranty
cov
