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
- 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 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
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SYMPTOM CHART
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Driveline System
DIAGNOSIS AND TESTING
PRINCIPLE OF OPERATION
For a detailed description of the driveline system and operation, refer to
the relevant description and operation section
in the workshop manual.
INSPECT
SEE MORE:
Winter park position
Make sure that the wiper arms are in the
winter park position before lifting the
wiper blades away from the windshield.
Failure to do so, may result in damage to
the bonnet.
When the vehicle is parked, the wipers
can be set to park in a higher position than
normal. The wiper blades can be lifted
f
Cleaning screens and displays
Do not polish the Instrument panel.
Polished surfaces are reflective, and may
interfere with the driver's view. Driving
with an obstructed view may result in
accidents causing serious injury or
death.
When cleaning around electrical
equipment, such as switches, make sure
fluids do not leak into a
