Test M

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

Test M1-M2:

Test M3-M5:

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 607 (LB/OG) and 616 (PK/BK) 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 607 (LB/OG).
^ a short to ground on circuit 616 (PK/BK).
^ a short to ground on the passenger air bag module.
^ an RCM internal concern.