Test K: LFC 22/DTC B2432 - Driver Buckle Switch Circuit Fault

K1:

K1:

K2:

K2 - K3:

K4 - K5:

K5 - K6:

K7 - K8:

Normal Operation

NOTE: In the buckled state, the RCM will see 258-455 ohms resistance to ground. In the unbuckled state, the RCM will see 725-1282 ohms resistance to ground.

The Restraints Control Module (RCM) monitors the driver safety belt buckle switch at RCM C310b pin 5, circuit 85 (BN/LB). If the RCM detects voltage, an open circuit or an unexpected resistance, it will store Diagnostic Trouble Code (DTC) B2432 in memory and flash Lamp Fault Code (LFC) 22 (or higher priority code if one exists) on the air bag indicator.

Possible Causes
A driver buckle switch circuit fault can be caused by:
^ a battery short on circuit 85 (BN/LB).
^ a ground short on circuit 85 (BN/LB).
^ high or low resistance on circuit 85 (BN/LB).
^ an RCM internal concern.