Test H: LFC 14/DTC B1921 - Air Bag Diagnostic Monitor Circuit Open
PINPOINT TEST H: LFC 14/DTC B1921 - AIR BAG DIAGNOSTIC MONITOR GROUND CIRCUIT OPENNormal Operation
The restraints control module (RCM) monitors the resistance between the ground connections of the case mounting and the reference ground at C310a pin 16, circuit 1203 (BK/LB).
If the RCM detects a difference in resistance, it will store DTC B1921 in memory and flash LFC 14 (or higher priority code if one exists) on the air bag warning indicator.
- DTC B1921 Air Bag Diagnostic Monitor Ground Circuit Open - If the RCM detects a difference in resistance between the ground circuit and the module mounting ground, it will set this DTC.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- RCM not securely mounted
- RCM
H1-H3:
H4-H6:
