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

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2004 ACCESSORIES/SAFETY EQUIPMENT Toyota - Air Bag Restraint Systems

Diagnostic Procedure

1. Disable air bag system. See DISABLING SYSTEM under DISABLING & ACTIVATING AIR BAG SYSTEM.

2. Measure resistance between Yellow/Black wire (circuit PR+) and Yellow wire (circuit PR-) of air bag sensor assembly side of passenger-side seat belt pretensioner squib harness connector. See WIRING DIAGRAMS . If resistance is more than one ohm, repair or replace harness or connector between seat belt pretensioner and air bag sensor assembly. If resistance is less than one ohm, go to next step.

3. Reconnect air bag sensor assembly connector A21 (right connector) to air bag sensor assembly. Connect jumper wire between Yellow/Black wire (circuit PR+) and Yellow wire (circuit PR-) of air bag sensor assembly side of passenger-side seat belt pretensioner squib harness connector. 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 DTCs. See RETRIEVING CODES under DIAGNOSTICS. If DTC 64/B0131 is not displayed, go to next step. If DTC 64/B0131 is displayed, replace air bag sensor assembly.

4. Turn ignition switch to LOCK position. Disconnect negative battery cable. Wait at least 90 seconds. Reconnect passenger-side seat belt pretensioner connector. 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 DTCs. See RETRIEVING CODES under DIAGNOSTICS. If DTC 64/B0131 is not displayed, system is functioning properly at this time. Check for intermittent fault. See AIR BAG WARNING LIGHT INTERMITTENT . If DTC 64/B0131 is displayed, replace passenger-side seat belt pretensioner.

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