AE: DTC B1891 - Air Bag Tone Warning Ind. Ckt Short to Batt/Ign

Normal Operation
The Restraints Control Module (RCM) monitors its connection to the Generic Electronic Module (GEM) at pin 20. This connection is used to signal a chime if the air bag indicator is inoperative and another SRS fault exists. If the RCM detects a short to battery or ignition on the connection to the GEM, it will store a Diagnostic Trouble Code (DTC) B1891 in memory.

Possible Causes
An air bag tone warning indicator circuit short to battery or ignition can be caused by:
- a short to battery or ignition on circuit 1083 (LB/BK).
- a damaged or inoperative GEM.
- a damaged RCM.

Pinpoint Test Steps:

AE1:

AE2 - AE3:

AE4 - AE5: