Diesel Data: Automotive Repair

Test G

PINPOINT TEST G: LFC 17/DTC B1879 - DRIVER PRETENSIONER CIRCUIT SHORTED TO GROUND


Test G1-G2:






Test G2-G3:






Test G4-G5:






Normal Operation
The restraints control module (RCM) monitors the circuit to the driver belt pretensioner. When the RCM detects a circuit short to ground it will set lamp fault code (LFC) 17 and diagnostic test code (DTC) B1879.

Possible Causes
A short to ground on the driver belt pretensioner circuit can be caused by:
- a short to ground on circuit 30S-JA33 (RD/BU).
- a short to ground on circuit 31S-JA33 (BK/BU).
- a short to ground on the driver belt pretensioner.
- a faulted RCM.