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Inspection Procedure

WARNING: This page is about a different car, the 2005 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK WIRE HARNESS (DLC3 - ECM) 
    1. Turn the ignition switch to the LOCK position.
    2. Disconnect the airbag sensor assy center connector.
    3. Measure the resistance according to the value (s) in SPECIFIED CONDITION DESCRIPTION  .

      Standard: 

      SPECIFIED CONDITION DESCRIPTION

      Tester connection Condition Specified condition
      D1-13 (TC) - E4-20 (TC) Always Below 1 Ω
    Fig 1: Identifying Wire Harness (DLC3 - ECM) Connector Terminals
    G02630006Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE WIRE HARNESS 
    2. OK: GO TO NEXT STEP 
  2. CHECK WIRE HARNESS (CG of DLC3 - BODY GROUND) 
    1. Measure the resistance according to the value (s) in SPECIFIED CONDITION DESCRIPTION  .

      Standard: 

      SPECIFIED CONDITION DESCRIPTION

      Tester connection Condition Specified condition
      D1-4 (CG) - Body ground Always Below 1 Ω
    Fig 2: Identifying DLC3 Connector Terminals
    G02630007Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE WIRE HARNESS 
    2. OK: GO TO NEXT STEP 
  3. CHECK WIRE HARNESS (TC of ECM - BODY GROUND) 
    1. Measure the resistance according to the value (s) in SPECIFIED CONDITION DESCRIPTION  .

      Standard: 

      SPECIFIED CONDITION DESCRIPTION

      Tester connection Condition Specified condition
      E4-20 (TC) - Body ground Always 1MΩ or Higher
    Fig 3: Wire Harness TC Of ECM Connector Terminals
    G02630008Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE WIRE HARNESS 
    2. OK: GO TO NEXT STEP 
  4. REPLACE ECM 
    1. Check the ECM.

      Result: 

      A: Normal system code is output. 

      B: DTC is output. 

      C: DTC output mode is set. 

    1. A: END 
    2. B: GO TO INSPECTION PROCEDURE OF DTC OUTPUT (SEE  DIAGNOSTIC TROUBLE CODE TABLE   ) 
    3. C: REPLACE AIR BAG SENSOR ASSY CENTER (SEE  REPLACEMENT  )