Land Rover Defender: Diagnosis and Testing

PRINCIPLES OF OPERATION

Ride and handling optimization incorporates the terrain response system which links a number of modules around the vehicle to give the best combination of settings in the different systems For a detailed description of the ride and handling system and operation, refer to the relevant description and operation section of the workshop manual.

INSPECTION AND VERIFICATION

WARNING: Before carrying out a road test, make sure the vehicle is safe to do so. Failure to follow this instruction may result in personal injury

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

NOTE: 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 DTCs and refer to the DTC index

SYMPTOM CHART

Because the overall function of the system is dependent on sub-systems, it is possible to misinterpret displays in the message centre as being terrain response faults when they are actually a result of a fault in one of the sub-systems Refer to the table below for help in deciding when to investigate terrain response faults and when the fault is likely to be in a sub-system

SYMPTOM CHART

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