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Home >> Toyota >> 1998 >> Avalon XLS >> Repair and Diagnosis (Single Page) >> Restraints >> Air Bag, SRS >> Air Bag Restraint System >> Diagnostic Tests >> DTC 31: Air Bag Sensor Assembly Malfunction >> Diagnostic Procedure

Diagnostic Procedure

  1. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Reconnect negative battery cable.
  2. Turn ignition switch to ON position. Measure voltage between ground and air bag sensor assembly connector C16, terminals No. 5 (circuit IG2, Black/Orange wire) and No. 6 (circuit ACC, Gray wire). See Figure. If voltage is more than 16 volts, check battery and charging system operation. If voltage is less than 16 volts, go to next step.
  3. Clear DTCs. See CLEARING CODES  under DIAGNOSIS & TESTING. Turn ignition switch to LOCK position. Wait at least 20 seconds. Turn ignition switch to ACC or ON position. Wait at least 20 seconds. Repeat at least 5 times. Retrieve DTCs. See RETRIEVING CODES  under DIAGNOSIS & TESTING. If DTC 31 is displayed, replace air bag sensor assembly. If DTC 31 is not displayed, system is functioning properly at this time. Check for intermittent fault. See AIR BAG WARNING LIGHT INTERMITTENT .
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