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:

• 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.

• When probing connectors to take measurements in the course of the pinpoint tests, use the adapter kit, part number 3548-1358-00.

NOTES:

• If the control module or a component is suspect and the vehicle remains under manufacturer warranty, refer to the Warranty Policy and Procedures manual (section B1.2), 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 manufacturer-approved diagnostic system).
• 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.
• 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 damage and system integrity.

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 Diagnostic Trouble Codes (DTCs) and refer to the DTC Index
5. 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

Steering Column Diagnosis and TestingSteering Column Diagnosis and Testing - Pinpoint tests

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