Test Q

PINPOINT TEST Q: LFC 15/DTC B1916 DRIVER AIR BAG CIRCUIT SHORTED TO BATTERY OR IGNITION

Test Q1:

Test Q2:

Test Q3-Q4:

Test Q5-Q6:

Normal Operation
The restraints control module (RCM) checks for driver air bag circuit shorts to battery or ignition by monitoring the voltage of circuit 30S-JA8 (RD/OG) and 31S-JA8 (BK/OG) at pins 3 and 4. If the RCM detects a short to battery or ignition on either of these pins, it will store a diagnostic trouble code (DTC) B1916 in memory and flash a lamp fault code (LFC) 15 (or higher priority code if one exists) on the air bag indicator.

Possible Causes
A driver air bag circuit short to battery or ignition can be caused by:
- a short to battery or ignition on circuit 30S-JA8 (RD/OG).
- a short to battery or ignition on circuit 31S-JA8 (BK/OG).
- a short to battery or ignition on the clockspring.
- a faulted RCM.