Preliminary Information

Before starting fault diagnosis, always do the following:


WARNING: No readings may be taken on the SRS before the airbags are disconnected.


Read the safety and handling instructions.
Turn the ignition switch to OFF and disconnect the negative cable from the battery.
Unplug the connectors at the back of the steering wheel center pad (airbag module) and passenger airbag.
Connect reference resistor 84 71 153 to each connector.
- When carrying out fault diagnosis on the seat-belt tensioners, connect reference resistor 84 71 153 1to each connector on the belt tensioners (M1995-).

Also note the following:
- It is forbidden to splice SRS cables. Splicing can cause malfunctioning and render the system unserviceable, and may even cause personal injury.
- If a connector is unplugged when the ignition is ON, this is registered as a fault by the control module. The fault does not disappear until the connector is plugged in and the diagnostic trouble code has been cleared.
- Always start fault diagnosis by making a note of the diagnostic trouble code. Then clear the trouble code, switch off the ignition, switch it on again and wait for at least 40 seconds. Then check whether the diagnostic trouble code has reappeared. If it has, the fault is permanent. If it has not, the fault is intermittent. Leave the ignition switched on and try to provoke the fault by jiggling the appropriate connectors, wiring, etc.

Observe the SRS lamp. If it starts flashing, check whether the diagnostic trouble code has been generated afresh.
In connection with fault diagnosis, the following designations are used:
Electric detonator 1 = electric detonator, driver airbag
Electric detonator 2 = electric detonator, passenger airbag.