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Inspection Procedure

  1. INSPECT MULTIPLEX NETWORK BODY ECU (BATB, BECU - ALTB TERMINALS) 
    1. Disconnect the instrument panel J/B (IA, ID) connectors.
    2. Measure the voltage according to the value(s) in the table below.

      Voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Condition Specified Condition
      IA-1 (BATB) - Body ground Always 10 to 14 V
      ID-10 (BECU) -Body ground Always 10 to 14 V
      ID-16 (ALTB) - Body ground Always 10 to 14 V

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (BATB, BECU OR ALTB CIRCUIT) 

    Fig 1: Identifying Instrument Panel J/B (IA, ID) Connectors Terminals
    G05005994Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  2. INSPECT MULTIPLEX NETWORK BODY ECU (GND TERMINAL) 
    1. Disconnect the instrument panel J/B (IF, IM) connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      IF-10 (GND1) - Body ground Always Below 1 Ω
      IM-9 (GND2) - Body ground Always Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) 

    Fig 2: Identifying Instrument Panel J/B (IF, IM) Connectors Terminals
    G05005995Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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