NOTE During testing if DTCs other than DTC B are displayed disregard them

Total OBD & ECU Auto Diagnostics

Total OBD & ECU Auto Diagnostics

Get Instant Access

Diagnostic Procedure

1. Disable air bag system. See DISABLING SYSTEM under DISABLING & ACTIVATING AIR BAG SYSTEM. Connect negative battery cable. Turn ignition switch to ON position.

2. Measure voltage between ground and spiral cable side of upper spiral cable connector Yellow/Black wire (circuit D+). See WIRING DIAGRAMS . If voltage is zero volt, turn ignition switch to LOCK position and go to next step. If voltage more than zero volt, go to step 5 .

3. Disconnect negative battery cable. Reconnect air bag sensor assembly connector A20 (center connector). Connect jumper wire between upper spiral cable connector Yellow/Black wire (circuit D+) and Yellow wire (circuit D-). Connect negative battery cable. Wait at least 2 seconds. Turn ignition switch to ON position. Wait at least 20 seconds. Clear DTCs. See CLEARING CODES under DIAGNOSTICS. Turn ignition switch to LOCK position. Wait at least 20 seconds. Turn ignition switch to ON position. Wait at least 20 seconds. Retrieve codes. See RETRIEVING CODES under DIAGNOSTICS. If DTC 12/B0103 is displayed, replace air bag sensor assembly. If DTC 12/B0103 is not displayed, go to next step.

4. Turn ignition switch to LOCK position. Disconnect negative battery cable. Wait at least 90 seconds. Reconnect upper spiral cable connector (to driver-side air bag module). Reconnect negative battery cable. Wait at least 2 seconds. Turn ignition switch to ON position. Wait at least 20 seconds. Clear DTCs. See CLEARING CODES under DIAGNOSTICS. Turn ignition switch to LOCK position. Wait at least 20 seconds. Turn ignition switch to ON position. Wait at least 20 seconds. Retrieve codes. See RETRIEVING CODES under DIAGNOSTICS. If DTC 12/B0103 is displayed, replace driver-side air bag module. If DTC 12/B0103 is not displayed, system is functioning properly at this time. Check for intermittent fault. See AIR BAG WARNING LIGHT INTERMITTENT .

5. Disconnect spiral cable lower connector. Measure voltage between ground and terminal D+ (Yellow/Black wire) of upper spiral cable connector. If voltage is zero volt, go to next step. If voltage is more than zero volt, replace spiral cable.

6. Measure voltage between ground and terminal D+ (Yellow/Black wire) of air bag sensor assembly side of lower spiral cable connector. If voltage is zero volt, system is functioning properly at this time. Check for intermittent fault. See AIR BAG WARNING LIGHT INTERMITTENT . If voltage is more than zero volt, replace wiring harness between spiral cable and air bag sensor assembly.

Was this article helpful?

0 0
Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

Don't pay hundreds of dollars to find out what is wrong with your car. This book is dedicated to helping the do it yourself home and independent technician understand and use OBD-II technology to diagnose and repair their own vehicles.

Get My Free Ebook


Post a comment