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Inspection Procedure

WARNING: This page is about a different car, the 2004 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Start the inspection from step 1 in the case of using the hand-held tester, and start from step  2 in the case of not using the hand-held tester.
  1. READ VALUE OF HAND-HELD TESTER 
    1. Connect the hand-held tester to DLC3.
    2. Turn the ignition switch ON and push the hand-held tester main switch ON.
    3. Select the items below in the DATA LIST, and read the displays on the hand-held tester.

    BODY NO.1: 

    Fig 1: Measurement Item/Display Normal Condition Table
    G02933901Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE  ) 
    2. NG: Go to next step. 
  2. INSPECT FUSE 
    1. Inspect the ECU ACC fuse, ECU-IG fuse and AM1 fuse in instrument panel junction block assy.
    1. NG: REPLACE FUSE 
    2. OK: Go to next step. 
  3. INSPECT RELAY 
    1. Inspect ACC relay continuity.
      Fig 2: Inspecting ACC Relay Continuity
      G02933902Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION

      Condition Tester connection Specified condition
      Always 1 - 2 Continuity
      Always 3 - 5 No continuity
      Apply B+ between the terminal 1 and 2 3 - 5 Continuity
    2. Inspect IG1 relay continuity.
      Fig 3: Inspecting IG1 Relay Continuity
      G02933903Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION

      Condition Tester connection Specified condition
      Always 1 - 2 Continuity
      Always 3 - 5 No continuity
      Apply B+ between the terminal 1 and 2 3 - 5 Continuity
    1. NG: REPLACE RELAY 
    2. OK: Go to next step. 
  4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY (ACC, IG) 
    Fig 4: Identifying Instrument Panel Junction Block Assy (ACC, IG) Connectors
    G02933904Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage between the terminals as shown in the chart below.

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified condition
      1H-9 - Body ground Ignition switch is OFF --> ACC, ON Below 1 V --> 10 to 14 V
      1H-29 - Body ground Ignition switch is OFF --> ON Below 1 V --> 10 to 14 V
    1. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE  ) 
    2. NG: Go to next step. 
  5. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY(+B) 
    Fig 5: Identifying Instrument Panel Junction Block Assy (+B) Connectors
    G02933905Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure voltage between the terminal 1A-1 of the instrument panel junction block assy and body ground.

      Standard: 

      TERMINAL 1A-1 - BODY GROUND

      Tester connection Specified voltage
      1A-1 - Body ground 10 to 14 V
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: Go to next step. 
  6. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY 
    Fig 6: Identifying Instrument Panel Junction Block Assy Connectors
    G02933906Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure voltage between the terminal 1H-10 of the instrument panel junction block assy and body ground.

      Standard: 

      TESTER CONNECTION SPECIFIED VOLTAGE

      Tester connection Condition Specified voltage
      1H-10 - Body ground Always 10 to 14 V
    1. NG: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY 
    2. OK: REPAIR OR REPLACE HARNESS OR CONNECTOR 
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