Test D

PINPOINT TEST D: DTC B1891 - AIR BAG TONE WARNING INDICATOR CIRCUIT SHORT TO VOLTAGE

Test D1:

Test D2:

Test D2-D3:

Test D4:

Test D5:

Normal Operation
The restraints control module (RCM) monitors its connection to the generic electronic module (GEM) at C2O41a pin 22, circuit 1083 (LB/BK). 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 voltage on the connection to the GEM, it will store diagnostic trouble code (DTC) B1891 in memory. The RCM will also flash lamp fault code (LFC) 53 (or a higher priority code if one exists) on the air bag indicator.

Possible Causes
An air bag tone warning indicator circuit short to voltage can be caused by:
- damaged wiring, terminals. or connectors.
- a short to voltage on circuit 1083 (LB/BK).
- GEM is faulted.
- RCM is faulted.