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Inspection Procedure

  1. CHECK TCM (POWER SOURCE, BODY GROUND) 
    1. Disconnect the A12 and E5 TCM connectors.
    2. Turn the engine switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Switch Condition Specified Condition
      A12-6 (+B) - E5-7 (E1) Engine switch on (IG) 11 to 14 V
    4. Turn the engine switch off.
    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

    RESISTANCE REFERENCE

    Tester Connection Condition Specified Condition
    E5-7 (E1) - Body ground Always Below 1 Ω
    Fig 1: Identifying A12 And E5 TCM Connector Terminal
    G06186918Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: CHECK HARNESS AND CONNECTOR (TCM EFI MAIN2 RELAY, BODY GROUND) 

    OK: GO TO ECM POWER SOURCE CIRCUIT (ENGINE CONTROL SYSTEM/SFI SYSTEM)  (See ECM POWER SOURCE CIRCUIT )

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