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Inspection Procedure

  1. CHECK DTC OUTPUT 
    1. Delete the DTCs (See DTC CHECK / CLEAR  ).

      HINT:

      After all DTCs are cleared, check if the trouble occurs again 6 seconds after the engine switch is turned on (IG).

    2. Check for DTCs again.

      OK: No DTC is output. 

    NG: Go to step 2 

    OK: CHECK INTERMITTENT PROBLEMS 

  2. INSPECT FUSE (AM2) 
    1. Remove the AM2 fuse from the engine room J/B.
    2. Measure the resistance of the fuse.

      Standard resistance: Below 1 Ω 

    NG: REPLACE FUSE 

    OK: Go to Next Step 

  3. CHECK WIRE HARNESS (MAIN BODY ECU - BATTERY) 
    1. Disconnect the E60 and E61 ECU connectors.
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      VOLTAGE SPECIFICATION

      Terminal No. (Symbol) Condition Specified Condition
      E61-6 (AM1) - Body ground Always 10 to 14 V
      E60-1 (AM2) - Body ground Always 10 to 14 V
    Fig 1: Identifying Main Body ECU Connector Terminals
    G05248819Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE MAIN BODY ECU