Test 2B - No Response From Air Bag Control Module
- Turn ignition on. Using scan tool in voltmeter mode, measure voltage on voltage input side of fuse No. 4 socket. If voltage is 10 volts or less, repair open ignition switch output circuit. If voltage is more than 10 volts, go to next step.
- Turn ignition off and wait 2 minutes. Using scan tool in ohmmeter mode, measure resistance on component side of fuse No. 4 socket. If resistance is 5 ohms or greater, go to step 5). If resistance is less than 5 ohms, go to next step.
- Disconnect Air Bag System Control Module (ABSCM) connector. ABSCM is located under center console. Turn ignition on. Using scan tool in ohmmeter mode, measure resistance on component side of fuse No. 4 socket. If resistance is 5 ohms or greater, go to next step. If resistance is less than 5 ohms, repair fused ignition switch output circuit for short to ground. Replace fuse No. 4.
- Replace fuse No. 4. Go to the AIR BAG RESTRAINT SYSTEM article in the ACCESSORIES/SAFETY EQUIPMENT section for further testing.
- Turn ignition off and wait 2 minutes. Disconnect Air Bag System Control Module (ABSCM) connector. ABSCM is located under center console. Using external ohmmeter, measure between ABSCM connector, terminal No. 1 (Dark Blue/White wire) and component side of fuse No. 4 socket. If resistance is 5 ohms or greater, repair open circuit between junction block and ABSCM. Replace open fuse. If resistance is less than 5 ohms, go to next step.
- Connect ABSCM connector. Turn ignition on. Replace fuse No. 4. Go to the AIR BAG RESTRAINT SYSTEM article in the ACCESSORIES/SAFETY EQUIPMENT section for further testing.
NOTE:
For connector terminal ID, see CONNECTOR IDENTIFICATION
and WIRING DIAGRAM
. After each repair, perform VERIFICATION TEST VER-1.
CAUTION:
Always turn ignition off prior to disconnecting any module connector.
NOTE:
Ignition off during bus test is most common cause for this trouble code.