Diagnostic Trouble Code Tests and Associated Procedures

DIAGNOSTIC TROUBLE CODES (DTCs)

B1231-B1885:

B1886-B2792:

While the lamp fault codes (LFCs) are an indication of a general concern in the passive restraints system, the diagnostic trouble codes (DTCs) are more specific. The DTCs can be retrieved from the restraints control module (RCM) with a scan tool via the data link connector (DLC).

Crosslink DTCs
When two deployable circuits are shorted together, a crosslink DTC will be recorded by the RCM. The RCM will store the lowest priority DTC as a short to ground fault. The crosslink DTC is a stored fault only, this fault will not be available during the on-demand self test. The RCM checks for a crosslink DTC only at startup, so an ignition cycle is needed for any changes to be initiated.

Active Commands
This command allows the technician to verify operation of the air bag indicator and chime. When the air bag output command is executed, the indicator and the chime are activated simultaneously for approximately four seconds. Both devices are deactivated automatically.