Land Rover Defender: Information and Message Center

DIAGNOSIS AND TESTING

PRINCIPLES OF OPERATION

For a detailed description of the information and message centre system and operation, refer to the relevant Description and Operation section of the workshop manual.

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 a 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 DTCs 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.

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 check the system for any logged Diagnostic Trouble Codes (DTCs) and refer to the 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 carry out the recommendations as required.

SYMPTOM CHART

PINPOINT TESTS

PINPOINT TEST A : HEAD UP DISPLAY (HUD) WINDSHIELD PROJECTED IMAGE DISTORTED

PINPOINT TEST B : HEAD UP DISPLAY (HUD) RAIN/LIGHT SENSOR

PINPOINT TEST C : HEAD UP DISPLAY (HUD) CONTROL MODULE

PINPOINT TEST D : HUD NAVIGATION DISPLAY CHECKS

PINPOINT TEST E : HUD TRAFFIC SIGN RECOGNITION (TSR) DISPLAY CHECKS

READ NEXT: