Initial Inspection and Diagnostic Overview

Inspection and Verification

WARNING: 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) components. to deplete the backup power supply energy, disconnect the battery ground cable and wait one minute. failure to follow this instruction may result in personal injury.

NOTE: Given the legal implications of a restraints system failure, harness repairs to airbag module circuits are not acceptable. Where the text refers to 'REPAIR the circuit', this will normally mean the replacement of a harness.

Jaguar approved diagnostic system
Given the complexity of the system and the potential for damage/injury, the preferred method of diagnosis is via the Jaguar approved diagnostic system.

If the Jaguar approved diagnostic system is not available, use a scan tool to extract DTCs and follow the pinpoint diagnostics in this section.
1. Verify the customer concern.
2. Confirm the function of the warning lamp (if the warning lamp is inoperative, system faults will be signalled by an audible chime).
3. Visually inspect for obvious signs of electrical damage.

Electrical
- Battery condition, state of charge
- Make sure all electrical connector(s) are engaged correctly on the air bag circuits
- Wiring harness
- Air bag module(s)
- Make sure the restraints control module (RCM) is correctly installed
- Fuse(s)
- Sensor(s)
- Pretensioner(s)
- Warning lamp bulb(s)

4. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
5. If the cause is not visually evident, verify the symptom and refer to the Jaguar approved diagnostic system.