Test O

PINPOINT TEST O: DTC B1891 - AIR BAG TONE WARNING INDICATOR CIRCUIT SHORTED TO BATTERY OR IGNITION

Test O1-O2:

Test O2-O3:

Test O4-O5:

Normal Operation
The restraints control module (RCM) monitors its connection to the instrument cluster at pin 26. 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 instrument cluster, 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 8-JA13 (WH/BK).
- a faulted or inoperative instrument cluster.
- a faulted RCM.