Land Rover Discovery: Pedestrian Protection System / Diagnosis and Testing

PRINCIPLES OF OPERATION

For a detailed description of the Pedestrian Protection System, refer to the relevant Description and Operation section in the workshop manual.

REFER to: Pedestrian Protection System (501-20C Pedestrian Protection System, Description and Operation).

INSPECTION AND VERIFICATION

WARNINGS:

TO AVOID ACCIDENTAL DEPLOYMENT AND POSSIBLE PERSONAL INJURY, THE BACKUP POWER SUPPLY MUST BE DEPLETED BEFORE REPAIRING OR REPLACING ANY PEDESTRIAN PROTECTION SYSTEM COMPONENTS. TO DEPLETE THE BACKUP POWER SUPPLY ENERGY, DISCONNECT THE BATTERY GROUND CABLE AND WAIT TWO MINUTES.

FAILURE TO FOLLOW THIS INSTRUCTION MAY RESULT IN PERSONAL INJURY.

Do not use a multimeter to probe the pedestrian protection system actuators. It is possible for the power from the multimeter battery to trigger the activation of the actuator. 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 tested and/or the donor vehicle.

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.
• 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.

• It is advisable not to use a cellular phone or to have a cellular phone in close proximity when working on the pedestrian protection system or components.
• Given the legal implications of a restraints system failure, harness repairs to pedestrian protection system circuits are not acceptable.

  Where the text refers to "REPAIR the circuit", this will normally mean the replacement of a harness.

• After 5 pedestrian protection system airbag deployment events, a new Restraints Control Module (RCM) and wiring harness must be installed.

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

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: Restraints Control Module (RCM) (100-00 General Information, Description and Operation).

Pedestrian Protection System / Description and OperationRear Center Safety Belt Buckle (G1780795) / Removal and Installation

READ NEXT: