Test U

PINPOINT TEST U: THE AIR BAG WARNING INDICATOR IS NEVER/ALWAYS ON

Test U1-U3:

Test U4-U6:

Normal Operation
The instrument cluster air bag warning indicator is powered through the instrument cluster in the START/RUN position. The instrument cluster monitors the control circuit 608 (BK/YE) and provides a ground for the air bag indicator based upon the air bag signal received from the restraint control module (RCM). The instrument cluster will turn on the air bag warning indicator when it receives an open (no ground) from the RCM on control circuit 608 (BK/YE). The instrument cluster will turn off the air bag warning indicator if it receives a ground signal from the RCM on control circuit 608 (BK/YE).

Possible Causes
- circuit 608 (BK/YE) open or shorted to ground
- restraint control module
- instrument cluster