Land Rover Discovery: Airbag and Safety Belt Pretensioner Supplemental Restraint System - Safety
Information
PRINCIPLES OF OPERATION
For a detailed description of the Supplemental Restraint System, refer to
the relevant Description and Operation section in the workshop manual.
REFER to: Airbag Supplemental Restraint System (501-20B Supplemental
Restraint System, Description and Operation).
SAFETY INFORMATION
WARNINGS:
NOTES:
- It is advisable not to use a cellular phone or to have a cellular
phone in close proximity when working on the restraints control
module or associated systems.
- Given the legal implications of a restraints system failure, harness
repairs to Air Bag module circuits are not acceptable. Where the
text refers to "REPAIR the circuit", this will normally mean the
replacement of a harness.
Power Supply Depletion
Before beginning any work on the SRS system or related components:
- Remove the ignition key
- Disconnect the battery leads, ground first
- Wait 1 minute for the power circuit to discharge
There are comprehensive instructions on the correct procedures for SRS
system repairs, refer to the relevant section of the workshop manual
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 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
- Check and rectify basic faults before beginning diagnostic routines
involving pinpoint tests
- Verify the customer concern
- Confirm the function of the warning lamp (if the warning lamp is
inoperative, system faults will be signalled by an audible chime)
- 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.
Faults in supplemental restraint system harnesses would normally
mean replacement of the relevant harness. Supplemental restraint
system harness repairs are not recommended
Symptom Chart
- 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
- When installing or checking the supplemental Restraints System (SRS)
with AK2 connectors the locking plunger must be engaged
READ NEXT:
NOTE:
NAS vehicles have a seat position sensor fitted to both the driver and
passenger-side seats.
The seat position sensor, a hall-effect sensor, is fitted to the underside of
both the driver and pas
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
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 (SRS)
com
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PART(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: Fuel Tank (310-01A Fuel Tank and Lines - TD4 2.2L Diesel, Removal
and Installation).
Refer to: Fuel Tank (31
Installation
NOTE:
Make sure that the drilled out spot welds are replaced with MIG plug
welds in the same quantities.
Dress the flanges where necessary.
Using the old fender apron panel reinforcement as a guide measure
and cut the new fender apron panel reinforcement that is attached
to th