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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.
  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: 

    MEASUREMENT ITEM/DISPLAY NORMAL CONDITION

    Item Measurement Item/Display (Range) Normal Condition Diagnostic Note
    LIGHT CTRL TYPE Light control type/CRNT or OLD Customized sign can be displayed. -
    1. OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY 
    2. NG: Go to next step. 
  2. CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK BODY ECU - AUTOMATIC LIGHT CONTROL SENSOR) 
    1. Check for open or short circuit in the harness and the connector between the terminal 6 of the automatic light control sensor and the terminal B6-6 of the multiplex network body ECU (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
    2. Check for open or short circuit in the harness and the connector between the terminal 3 of the automatic light control sensor and the terminal B6-4 of the multiplex network body ECU (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
    3. Check for open or short circuit in the harness and the connector between the terminal 5 of the automatic light control sensor and the terminal B6-5 of the multiplex network body ECU (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: Go to next step. 
  3. INSPECT AUTOMATIC LIGHT CONTROL SENSOR 
    1. Measure voltage between the terminal 3 and the terminal 5 of the automatic light control sensor.

      Standard: 

      TESTER CONNECTION SPECIFIED VOLTAGE

      Tester connection Condition Specified voltage
      3 - 5 Ignition switch OFF --> ON Signal wave form
    1. OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY 
    2. NG: Go to next step. 
  4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY 
    1. Measure voltage between the terminal B6-6 and the terminal B6-4 of the multiplex network body ECU in the instrument panel junction block assy.

      Standard: 

      TESTER CONNECTION SPECIFIED VOLTAGE

      Tester connection Condition Specified voltage
      B6-4 - B6-6 Ignition switch OFF --> ON 10 to 14 V
      Fig 1: Identifying Instrument Panel Junction Block Assy Connectors
      G02933878Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY 
    2. OK: REPLACE AUTOMATIC LIGHT CONTROL SENSOR 
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