Test Q: LFC 51/DTC B2691 - Driver Safety Belt Buckle Switch Circuit Fault

PINPOINT TEST Q: LFC 51/DTC B2691 - DRIVER SAFETY BELT BUCKLE SWITCH CIRCUIT FAULT

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

The RCM checks the driver safety belt buckle switch circuits for faults. If the RCM detects an open circuit or short to voltage fault, it will store DTC B2691 in memory and flash LFC 51 (or higher priority code if one exists) on the air bag warning indicator.

- DTC B2691 Seat Belt Buckle Switch Circuit Fault, Front Driver's Side - If the RCM detects an open or short to voltage on the driver safety belt buckle switch circuit, it will set this DTC.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Driver safety belt buckle switch
- RCM

Q1-Q2:

Q2-Q3:

Q4-Q6:

Q7-Q8: