Test F: LFC 53/DTC B1891 - Air Bag Tone Warning Indicator Circuit Short To Battery

PINPOINT TEST F: LFC 53/DTC B1891 - AIR BAG TONE WARNING INDICATOR CIRCUIT SHORT TO BATTERY

Normal Operation
The connection between the instrument cluster (IC) module and restraint control module (RCM) is used to signal a chime in the IC module if the primary air bag warning indicator is inoperative and another SRS fault exists. The RCM monitors this connection to the IC module at C220 pin 23.

If the RCM detects a circuit failure on the connection to the cluster, it will store DTC B1891 in memory and flash LFC 53 (or a higher priority code if one exists) on the air bag warning indicator.

- DTC B1891 Air Bag Tone Warning Indicator Circuit Short to Battery - If the RCM detects a short to battery on the air bag tone warning indicator circuit, it will set this DTC.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Instrument cluster (IC) module
- RCM

F1-F3:

F3-F5: