Land Rover Discovery: Steering Column Diagnosis and
Testing - Inspection and verification
Inspection and verification
PRINCIPLE OF OPERATION
For a detailed description of the Steering System and operation, refer to the
relevant Description and Operation section of the workshop manual. REFER
to: Steering Column (211-04 Steering Column, Description and Operation).
Inspection and verification
CAUTIONS:
NOTES:
- Verify the customer concern
- Visually inspect for obvious signs of damage and system integrity.
Visual Inspection
![Visual Inspection](images/books/227/index283(7).jpg)
![Visual Inspection](images/books/227/index284(7).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
SYMPTOM CHART
![SYMPTOM CHART](images/books/227/index285(7).jpg)
![SYMPTOM CHART](images/books/227/index286(7).jpg)
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Pinpoint tests
NOTE:
The steering wheel heater will not operate if the engine is not
running.
NOTES:
An infra-red thermometer is used during this test.
The steering wheel temperature should have in
REMOVAL
NOTES:
Removal steps in this procedure may contain installation details.
The steering wheel is shown removed for clarity.
Left hand drive illustration(s) shown, Right hand drive is similar
REMOVAL
NOTES:
Removal steps in this procedure may contain installation details.
Removal of the windshield wiper switch assembly is identical to this
procedure.
INSTALLATION
To install,
SEE MORE:
REMOVAL
NOTES:
Removal steps in this procedure may contain installation details.
Engine shown removed for clarity.
Disconnect the battery ground cable.
Refer to: Specifications (414-01 Battery, Mounting and Cables,
Specifications).
WARNING:
Make sure to support the vehicle with axle stands.
Rai
Gear set 1
Gearset 2
Gear set 3
Gear set 4
The planetary gear trains used on the 9HP48 transmission comprise four
planetary gear sets; GS1, GS2, GS3 and GS4.
Engine torque is transferred, via operation of single or combinations of
multiplate clutches, multiplate brakes and two dog clutches,