Test T: DTC B2438 - Passenger Safety Belt Buckle Switch Circuit Short to Ground

PINPOINT TEST T: DTC B2438 - PASSENGER SAFETY BELT BUCKLE SWITCH CIRCUIT SHORT TO GROUND

T1-T3:

T3-T6:

Lamp Fault Codes (LFCs)







The lamp fault code (LFC) indicates the specific fault associated with diagnostic trouble code (DTC) B2438:

Normal Operation
As part of the SRS, the safety belt buckles are equipped with Hall-effect switches. The safety belt switches indicate to the restraints control module (RCM) whether the safety belts are connected or disconnected.

The RCM checks the passenger safety belt buckle switch circuits for faults. If the RCM detects a short to ground fault, it will store DTC B2438 in memory and flash LFC 7-2 on the air bag indicator.

Possible Causes
A passenger safety belt buckle switch short to ground circuit fault can be caused by:
- wiring, terminals or connectors.
- a faulty passenger safety belt buckle switch.
- a faulted RCM.