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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 80 (Air Bag Restraint Systems) >> Diagnostic Tests >> DTC 31/B1100: Air Bag Sensor Assembly Malfunction >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Access air bag sensor assembly and disconnect harness connector A17. See AIR BAG SENSOR ASSEMBLY  under REMOVAL & INSTALLATION. Reconnect negative battery cable. Turn ignition switch to ON position. Measure voltage between ground and air bag sensor assembly connector A17, terminals No. 5 (circuit IG2, Black/Orange wire) and No. 6 (circuit IG1, Black/Blue wire). See Figure. If voltage is 10-14 volts on both circuits, go to next step. If voltage is not 10-14 volts, repair or replace appropriate wire as necessary. See WIRING DIAGRAMS .
  2. Turn ignition switch to LOCK position. Disconnect negative battery cable. Wait at least 90 seconds. Reconnect air bag sensor assembly harness connector A17. Connect negative battery cable. Wait at least 2 seconds. Turn ignition switch to ON position. Wait at least 20 seconds. Clear DTCs. See CLEARING DTCS  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 DTCs. See RETRIEVING DTCS  under DIAGNOSTICS. If DTC 31/B1100 is displayed, replace air bag sensor assembly. If DTC 31/B1100 is not displayed, system is functioning properly at this time. Check for intermittent fault. See AIR BAG WARNING LIGHT INTERMITTENT .
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