Diagnostic Procedure
WARNING: This page is about a different car, the 2002 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
- Turn ignition switch from LOCK to ACC or ON position. If AIR BAG warning light does not illuminate for about 6 seconds, go to AIR BAG WARNING LIGHT DOES NOT ILLUMINATE . If AIR BAG warning light illuminates for about 6 seconds, go to next step.
- With ignition switch in ACC or ON position, measure voltage between DLC1 terminals Tc (Pink/Black wire) and E1 (Brown wire) or between DLC3 terminals Tc (Light Green/Red wire) and CG (White/Blue wire). See Figure or Fig 1 . If 10-14 volts is present, go to step 4. If 10-14 volts is not present, go to next step.
- With ignition switch in ACC or ON position, measure voltage between ground and DLC1 terminal Tc (Pink/Black wire) or between ground and DLC3 terminal Tc (Light Green/Red wire). If 10-14 volts is present, repair harness between ground and DLC1 terminal E1 (Brown wire) or between ground and DLC1 terminal CG (White/Blue wire). See WIRING DIAGRAMS . If 10-14 volts is not present, go to next step.
- Turn ignition switch to LOCK position. Disconnect negative battery cable and wait at least 90 seconds. Access and disconnect air bag sensor assembly connector C6 (center connector). See AIR BAG SENSOR ASSEMBLY under REMOVAL & INSTALLATION. Connect one end of jumper wire to harness side of air bag sensor assembly connector C6, terminal No. 19 (Circuit Tc, Pink/Black wire). See Figure. Leave other end of jumper wire disconnected.
- Reconnect air bag sensor assembly connector with jumper wire connected. Connect negative battery cable and turn ignition switch to ACC or ON position. Wait at least 20 seconds. Connect unconnected end of jumper wire to ground. If AIR BAG warning light does not illuminate, replace air bag sensor assembly. If AIR BAG warning light illuminates, check Pink/Black wire between air bag sensor assembly and DLC1.