Land Rover Defender: Roof Opening Panel - Diagnosis and Testing

DIAGNOSIS AND TESTING

PRINCIPLE OF OPERATION

For a detailed description of the roof opening panel system and operation, refer to the relevant description and operation section of the workshop manual. REFER to: Roof Opening Panel (Roof Opening Panel, 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 checked and/or the donor vehicle

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

1. Verify the customer concern
2. Visually inspect for obvious signs of mechanical or electrical damage

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, verify the symptom and refer to the symptom chart, alternatively check for Diagnostic Trouble Code(s) and refer to the Diagnostic Trouble Code(s) (DTC) 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

SYMPTOM CHART

FURTHER DIAGNOSTICS FOR ROOF OPENING PANEL GLASS/ROOF OPENING PANEL BLIND ISSUES

The following diagnostic tests should be used if the customer reports that the roof opening panel glass and/or roof opening panel blind is not functioning as expected.

NOTE: These diagnostic procedures allow the technician to accurately identify the precise nature of the roof opening panel glass/roof opening panel blind fault. To assist the retailer in understanding the concerns (so that the quality of the parts can be improved) please use the diagnostics aid below to correctly identify and report the specific concern description through the Retailer/Authorized Repairer warranty system

PINPOINT TEST A : ROOF OPENING PANEL GLASS/ROOF OPENING PANEL BLIND PINPOINT TESTS

ROOF OPENING PANEL BLIND/ROOF OPENING PANEL GLASS FAULTS - REMEDIAL ACTIONS

NOTE: If the roof opening panel blind is de-normalised the roof opening panel glass cannot open (roof opening panel blind position is not known). If the roof opening panel glass is de-normalised the roof opening panel blind cannot close (roof opening panel glass position is not known)

ROOF OPENING PANEL BLIND/ROOF OPENING PANEL GLASS INITIALIZATION

NOTE: Roof opening panel blind/roof opening panel glass initialization will be lost if the battery is disconnected, or if the roof opening panel blind/roof opening panel glass motor power supply is interrupted when the roof opening panel blind/roof opening panel glass is in motion.

Initialize the roof opening panel blind/roof opening panel glass as follows:

1. Start the engine and leave running during the initialization process
2. Make sure that the roof opening panel blind/roof opening panel glass is in the fully closed position - press the close switch to achieve this
3. Press and hold the close switch again and wait for the roof opening panel glass to jog forward a few millimetres and then return to its original position (this should take approximately 30 seconds), then release the switch
4. Within 3 seconds, press and hold the close switch. The roof opening panel blind/roof opening panel glass will automatically travel toward the open position and then to the fully closed position. Release the switch when movement is complete

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