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.
- Verify the customer concern
- Visually inspect for obvious signs of damage and system integrity
Visual Inspection
- 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
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).
READ NEXT:
REMOVAL
NOTES:
Some variation in the illustrations may occur, but the essential
information is always correct.
Removal steps in this procedure may contain installation details.
Refer to: Specific
Removal
NOTES:
Some variation in the illustrations may occur, but the essential
information is always correct.
Removal steps in this procedure may contain installation details.
Disconnect the gro
REMOVAL
WARNINGS:
To avoid accidental deployment and possible personal injury,
the
backup power supply must be depleted before repairing or
replacing any air bag supplemental restraint system (S
SEE MORE:
Windshield Wiper Motor
NOTE:
Right Hand Drive (RHD) wiper assembly shown
Electrical connector
Electric windshield wiper motor
The windshield wiper motor comprises a 12V electric motor and gear wheel
and worm drive, contained in an integral housing.
The windshield wiper motor drives an integra
To switch off the engine while the vehicle
is stationary:
Apply the Electric Parking Brake (EPB).
Mark sure that Park (P) (automatic
transmission) or Neutral (N) (manual
transmission) is selected.
Press and release the engine START/
STOP button.
The engine now stops, but the vehicle's
igniti