Test H: DTC B1921 - Air Bag Diagnostic Monitor Ground Circuit Open

PINPOINT TEST H: DTC B1921 - AIR BAG DIAGNOSTIC MONITOR GROUND CIRCUIT OPEN

Lamp Fault Codes (LFCs)
The following lamp fault code (LFC) indicates the specific fault associated with DTC B1921:







Normal Operation
The restraints control module (RCM) monitors the resistance between the case ground and the reference ground at C310a pin 16, circuit 676 (PK/OG).

If the RCM detects a difference in resistance, it will store DTC B1921 in memory and flash LFC 1-4 on the air bag warning indicator.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- RCM not securely mounted
- RCM

H1:

H1-H4:

H5-H7: