Test P: LFC 52/DTC B2438 - Passenger Safety Belt Buckle Switch Circuit Short to Ground

PINPOINT TEST P: LFC 52/DTC B2438 - PASSENGER SAFETY BELT BUCKLE SWITCH CIRCUIT SHORT TO GROUND

P1-P3:

P3-P6:

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

The RCM checks the passenger safety belt buckle switch circuits for faults. If the RCM detects a short to ground fault, it will store diagnostic trouble code (DTC) B2438 in memory and flash lamp fault code (LFC) 52 (or higher priority code if one exists) on the air bag indicator.

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