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Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.
  1. READ VALUE OF INTELLIGENT TESTER 
    1. Connect the intelligent tester to DLC3.
    2. Turn the ignition switch to ON and push the intelligent tester main switch ON.
    3. Select the items below in the DATA LIST, and read the displays on the intelligent tester.
    DATA LIST TABLE

    Item Measurement Item/Display (Range) Normal Condition Diagnostic Note
    ACC SW ACC SW signal/ON or OFF ON: Ignition key is in ACC, ON or START position
    OFF: Ignition key is in OFF position    		 -
    IG SW IG SW signal/ON or OFF ON: Ignition key is in ON or START position
    OFF: Ignition key is in OFF or ACC position    		 -

    OK:  Go to step  3

    NG: Go to next step. 

  2. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (ACC, SIG) 
    Fig 1: Identifying Instrument Panel Junction Block Assembly Connector Terminals (ACC, SIG)
    G05265723Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the connector from the instrument panel J/B assembly (driver side J/B assembly).
    2. Check continuity between terminal ACC, SIG of the instrument panel J/B assembly (driver side J/B assembly) on the wire harness side and body ground.

      Standard voltage 

      TERMINAL SPECIFIED CONDITION

      Terminal No. (Symbols) Condition Specified Condition
      ID-5 - Body ground (ACC - Body ground) Turn IG switch OFF → ACC 0 V → 10 to 14 V
      IC-2 - Body ground (SIG - Body ground) Turn IG switch OFF → ON 0 V → 10 to 14 V

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

  3. READ VALUE OF INTELLIGENT TESTER 
    1. Connect the intelligent tester to DLC3.
    2. Turn the ignition switch to ON and push the intelligent tester main switch ON.
    3. Select the items below in the DATA LIST, and read the displays on the intelligent tester.

    BGW: 

    DATA LIST TABLE

    Item Measurement Item/Display (Range) Normal Condition Diagnostic Note
    IG SW IG SW signal/ON or OFF ON: Ignition switch is in ON or START position
    OFF: Ignition switch is in OFF or ACC position    		 -

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

    NG: Go to next step. 

  4. INSPECT MULTIPLEX NETWORK BODY ECU NO. 2 (SIG) 
    Fig 2: Identifying Multiplex Network Body ECU No. 2 Connector Terminals (SIG)
    G05265730Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the connector from the multiplex network body ECU No. 2.
    2. Check continuity between terminal SIG of the multiplex network body ECU No. 2 on the wire harness side and body ground.

      Standard voltage 

      TERMINAL SPECIFIED CONDITION

      Terminal No. (Symbols) Condition Specified Condition
      S27-3 - Body ground (SIG - Body ground) Turn IG switch OFF → ACC 0 V → 10 to 14 V

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

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