Land Rover Defender: Driver Door Module

DIAGNOSIS AND TESTING

DESCRIPTION AND OPERATION

For a detailed description of the driver/passenger door modules, refer to the relevant description and operation sections in the workshop manual.

INSPECTION AND VERIFICATION

CAUTIONS:

• 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
• The vehicle latches are non-serviceable. Lubrication must not be sprayed into or around the door latches.

  Care should be taken when washing the vehicle to not spray water at or into the latches

NOTES:

• If a control module or a component may be at fault and the vehicle remains under manufacturer warranty, refer to the Warranty Policy and Procedures manual, 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 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.

1. Verify the customer concern
2. Visually inspect for obvious signs of damage and system integrity

Visual Inspection

3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step
4. If the cause is not visually evident, check for diagnostic trouble codes (DTCs) and refer to the diagnostic trouble codes index
5. 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

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