Test M

PINPOINT TEST M: LFC 16/DTC B1888 - PASSENGER AIR BAG CIRCUIT SHORTED TO GROUND

Test M1:

Test M2:

Test M3-M4:

Test M5-M6:

Normal Operation
The restraints control module (RCM) checks for passenger air bag circuit shorts to ground by monitoring the voltage of circuits 30S-JA11 (RD/WH) and 31S-JA11 (BK/WH) at pins 6 and 7. If the RCM detects a short to ground on either of these pins, it will store a diagnostic trouble code (DTC) B1888 in memory and flash a lamp fault code (LFC) 16 (or higher priority code if one exists) on the air bag indicator.

Possible Causes
A passenger air bag circuit short to ground can be caused by:
- a short to ground on circuit 30S-JA11 (RD/WH).
- a short to ground on circuit 31S-JA11 (BK/WH).
- a short to ground on the passenger air bag module.
- a faulted RCM.