Tests AO: DTC B1891 - Air Bag Tone Warning Indicator CKT Shorted to Batt or Ign

Pinpoint Test AO1:

Pinpoint Test AO2:

Pinpoint Test AO3:

Pinpoint Test AO4-AO5:

Pinpoint Test AO: DTC B1891 - Air Bag Tone Warning Indicator Circuit Shorted to Battery or Ignition

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.
- an RCM internal concern.