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Inspection Procedure

  1. INSPECT ECU TERMINAL VOLTAGE (+B TERMINAL) 
    1. Disconnect the TCM connector.
    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 Specified Condition
      +B (B40-18) - E1 (B40-8) 9 to 14 V
    Fig 1: TCM Connector Terminal Identification
    G05249531Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: CHECK FOR INTERMITTENT PROBLEMS 

    NG: Go to Next Step 

  2. CHECK HARNESS AND CONNECTOR (TCM - BODY GROUND) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      E1 (B40-8) - Body ground Below 1 Ω
    2. Reconnect the TCM connector.
    Fig 2: TCM Connector Terminal Identification
    G05249545Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (TCM - BODY GROUND) 

    OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (TCM - EFI RELAY)