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Inspection Procedure

  1. CHECK WIRE HARNESS (+B1, +B, E) 
    1. Turn the engine switch off.
    2. Disconnect the ECM connectors (E4) and (A5).
    3. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION CHART

      Tester Connection Condition Specified Value
      E4-7 (E1) - Body ground Always Below 1 Ω
    4. Measure the voltage according to the value (s) in the table below.
      Fig 1: Identifying ECM Connectors E4 And A5
      G05828598Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      VOLTAGE SPECIFICATION CHART

      Tester Connection Condition Specified Value
      A5-5 (+B1) - Body ground Engine switch off 10 to 14 V
      A5-6 (+B) - Body ground Engine switch off 10 to 14 V

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: REPLACE ECM 

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