Diagnostic Notes

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Before starting fault diagnosis, observe the following points:

WARNING: No measurements or connections are to be made to the SRS before the airbags have been disconnected.

^ Read through the "Service Precautions", Service Precautions
^ Switch off the ignition and disconnect the negative battery lead.
^ Unplug the connectors from the rear of the steering wheel airbag and the passenger airbag (H2-77).
^ Connect reference resistor 84 71 153 to each connector.
^ When diagnosing faults in the belt tensioners, connect reference resistor 84 71 153 to each connector on the belt tensioners.

Also note the following:
^ SRS leads must not be spliced. Splicing can cause functional defects and render the system unserviceable and even lead to injury.
^ If a connector is unplugged with the ignition on, this is registered as a fault by the control module. The fault does not disappear until the connector in plugged in and the diagnostic trouble code has been erased.