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Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Toyota Celica. 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. Reconnect negative battery cable. Ensure left door side air bag sensor is disconnected.
  2. Turn ignition switch to ON position. Measure voltage between ground and air bag sensor assembly connector C6, terminal No. 17 (White/Blue wire, circuit DML+). See Figure. Measure voltage between ground and air bag sensor assembly connector C6, terminal No. 16 (Red/Yellow wire, circuit DML-). If voltage in both tests is less than one volt, turn ignition switch to LOCK position. Go to next step. If any voltage is more than one volt, go to step  8.
  3. Measure resistance between ground and air bag sensor assembly connector C6, terminal No. 17 (White/Blue wire, circuit DML+). See Figure. Measure resistance between ground and air bag sensor assembly connector C6, terminal No. 16 (Red/Yellow wire, circuit DML-). If resistance in both tests is more than one megohm, go to next step. If any resistance is less than one megohm, go to step  9.
  4. Measure resistance between air bag sensor assembly connector C6, terminals No. 17 (White/Blue wire, circuit DML+) and terminal No. 16 (Red/Yellow wire, circuit DML-). If resistance is more than one megohm, go to next step. If resistance is less than one megohm, go to step  10.
  5. Connect jumper wire between White/Blue and Red/Yellow wires on air bag sensor assembly side of door side air bag sensor harness connector. Measure resistance between air bag sensor assembly connector C6, terminals No. 17 (White/Blue wire, circuit DML+) and terminal No. 16 (Red/Yellow wire, circuit DML-). If resistance is less than one ohm, go to next step. If resistance is more than one ohm, go to step  11.
  6. Measure resistance between door side air bag sensor terminals. If resistance is 300-1500 ohms, go to next step. If resistance is not 300-1500 ohms, replace door side air bag sensor.
  7. Turn ignition switch to LOCK position. Disconnect negative battery cable. Wait at least 90 seconds. Connect door side air bag sensor and air bag sensor assembly connector C6. Connect negative battery cable. Wait at least 20 seconds. Turn ignition switch to ON position. 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 35/B1144 or B1145 is displayed, replace air bag sensor. If DTC 35/B1144 or B1145 is not displayed, system is functioning properly at this time. Check for intermittent fault. See AIR BAG WARNING LIGHT INTERMITTENT  under DIAGNOSTIC TESTS.
  8. Disconnect left door side air bag sensor Yellow 2-pin sub-harness connector located behind left kick panel. Measure voltage between ground and White/Blue wire on door side air bag sensor side of sub-harness connector. Measure voltage between ground and Red/Yellow wire on door side air bag sensor side of sub-harness connector. If voltage is less than one volt, repair or replace wire harness or connector between air bag sensor assembly and sub-harness connector. If voltage is more than one volt, repair or replace wire harness between sub-harness connector and door side air bag sensor.
  9. Disconnect left door side air bag sensor Yellow 2-pin sub-harness connector located behind left kick panel. Measure resistance between ground and White/Blue wire on door side air bag sensor side of sub-harness connector. Measure resistance between ground and Red/Yellow wire on door side air bag sensor side of sub-harness connector. If resistance is more than one megohm, repair or replace wire harness or connector between air bag sensor assembly and sub-harness connector. If resistance is less than one megohm, repair or replace wire harness between sub-harness connector and front air bag sensor.
  10. Disconnect left door side air bag sensor Yellow 2-pin sub-harness connector located behind left kick panel. Measure resistance between White/Blue and Red/Yellow wires on door side air bag sensor side of sub-harness connector. If resistance is more than one megohm, repair or replace wire harness or connector between air bag sensor assembly and sub-harness connector. If resistance is less than one megohm, repair or replace wire harness between sub-harness connector and front air bag sensor.
  11. Disconnect left door side air bag sensor Yellow 2-pin sub-harness connector located behind left kick panel. Connect jumper wire between White/Blue and Red/Yellow wires on air bag sensor assembly side of door side air bag sensor harness connector. Measure resistance between White/Blue and Red/Yellow wires on door side air bag sensor side of sub-harness connector. If resistance is less than one ohm, repair or replace wire harness or connector between air bag sensor assembly and sub-harness connector. If resistance is more than one ohm, repair or replace wire harness between sub-harness connector and door side air bag sensor.
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