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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 63: Short In Passenger-Side Seat Belt PRETENSIONER Squib Circuit >> Diagnostic Procedure

Diagnostic Procedure

  1. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM.
  2. Release shorting spring on air bag sensor assembly side of passenger-side seat belt pretensioner squib harness connector. See RELEASING SHORTING SPRING  under DIAGNOSIS & TESTING. Measure resistance between passenger-side seat belt pretensioner squib harness connector Yellow/Black wire (circuit PR+) and Yellow wire (circuit PR-). See WIRING DIAGRAMS . If resistance is less than one megohm, repair or replace harness or connector between passenger-side seat belt pretensioner and air bag sensor assembly. If resistance is more than one megohm, go to next step.
  3. Reconnect air bag sensor assembly connector C18 to air bag sensor assembly. Connect jumper wire between passenger-side seat belt pretensioner squib harness connector Yellow/Black wire (circuit PR+) and Yellow wire (circuit PR-). Connect negative battery cable. Wait at least 2 seconds. Turn ignition switch to ACC or ON position. Wait at least 20 seconds. 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. Retrieve DTCs. See RETRIEVING CODES  under DIAGNOSIS & TESTING. If DTC 63 is not displayed, go to next step. If DTC 63 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 ACC or ON position. Wait at least 20 seconds. 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. Retrieve DTCs. See RETRIEVING CODES  under DIAGNOSIS & TESTING. If DTC 63 is not displayed, system is functioning properly at this time. Check for intermittent fault. See AIR BAG WARNING LIGHT INTERMITTENT . If DTC 63 is displayed, replace passenger-side seat belt pretensioner.
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