Land Rover Discovery: Instrument Cluster / Diagnosis and Testing
PRINCIPLES OF OPERATION
For a detailed description of the Instrument Cluster, refer to the relevant
Description and Operation section in the workshop manual. REFER to:
Instrument Cluster (413-01 Instrument Cluster, 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 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.
- When performing voltage or resistance tests, always use a digital
multimeter accurate to three decimal places, and with an up-todate
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.
- Verify the customer concern
- Visually inspect for obvious signs of damage and system integrity
- With the ignition on, check the operation of the audio output from the
instrument cluster integrated speakers by operating the turn signal
indicators (left and right) and verifying that audible feedback (a ticking
sound) is present
Visual Inspection
![Instrument Cluster / Diagnosis and Testing](images/books/227/index417(1).jpg)
- 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 Diagnostic Trouble Codes
(DTCs) and refer to the DTC Index
- Check DDW 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
CAR CONFIGURATION FILE ( CCF )
CAUTION:
If a new instrument cluster is to be installed, the instrument cluster
renewal procedure must be carried out using the approved diagnostic
system. This will ensure that the CCF data is correctly transferred
from the central junction box (CJB) to the replacement cluster. The
CCF will also need to be updated using the approved diagnostic
system if the vehicle is modified in service from its original factory
specification. This can include the fitting of non-standard wheels
and/or tires and optional accessory dealer install components with an
electrical interface, such as park distance control.
The CCF contains all relevant data about the specification and market
condition of the applicable vehicle, immobilization codes and driver
personal settings. This information is retained in the CJB, the engine control
module (ECM) and the instrument cluster enabling each system module to
detect which systems and components are installed to the vehicle. The
information is continuously transferred between these three system modules
to ensure that the data is constantly backed-up between the modules.
DTC INDEX
For a list of Diagnostic Trouble Codes (DTCs) that could be logged on this
vehicle, please refer to Section 100-00. REFER to: Diagnostic Trouble Code Index
- DTC: Instrument Cluster (IC) (100-00 General Information,
Description and Operation).
Instrument cluster specifications
![Instrument cluster specifications](images/books/227/index418(1).jpg)
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REMOVAL
NOTES:
LH illustration shown, RH is similar.
Removal steps in this procedure may contain installation details.
The ignition must be switched off.
WARNING:
Make sure to support the vehicle
REMOVA L
NOTES:
Removal steps in this procedure may contain installation details.
The ignition must be switched off.
WARNING:
Make sure to support the vehicle with axle stands.
Raise and support t
SEE MORE:
WARNING:
Always wear safety glasses when repairing an air bag
supplemental restraint system (SRS) vehicle and when
handling an air bag module. Failure to follow this instruction
may result in personal injury.
Deployed air bag modules are to be disposed of as special waste
and must comply with local
SPECIAL TOOL(S)
REMOVAL
NOTE:
Removal steps in this procedure may contain installation details.
WARNING:
Make sure to support the vehicle with axle stands.
Raise and support the vehicle.
Refer to: Fender Splash Shield (501-02 Front End Body Panels,
Removal and Installation).
Special Tool(s): JLR