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Home › Toyota › 2007 › Camry Solara SE, 2D Convertible › Repair and Diagnosis › Engine Performance › System › Engine Control System (3MZ-FE) › SFI System › ECM Power Source Circuit › Inspection Procedure

Inspection Procedure

  1. INSPECT ECM (+B VOLTAGE) 
    1. Turn the ignition switch to the ON position.
    2. Measure the voltage between the terminals of the ECM connectors.
      Fig 1: Identifying E6 And E4 Connectors Terminals
      G05128689Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      +B (E4-1) - E1 (E6-1) 9 to 14 V
      +B2 (E4-2) - E1 (E6-1) 9 to 14 V

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

    NG: Go to Next Step 

  2. CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND) 
    1. Disconnect the ECM connector.
    2. Measure the resistance between the terminal of the ECM connector and body ground.
      Fig 2: Identifying E6 Connector Terminals
      G05128690Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance: 

      Check for open 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      E1 (E6-1) - Body ground Below 1 Ω
    3. Reconnect the ECM connector.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  3. INSPECT ECM (IGSW VOLTAGE) 
    1. Turn the ignition switch to the ON position.
    2. Measure the voltage between the terminals of the ECM connectors.
      Fig 3: Identifying E4 And E6 Connectors Terminals
      G05128691Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      IGSW (E4-9) - E1 (E6-1) 9 to 14 V

    OK: Go to step  6

    NG: Go to Next Step 

  4. CHECK FUSE (IGN FUSE) 
    1. Remove the IG2 fuse from the engine room J/B.
      Fig 4: Identifying IG2 Fuse
      G05128692Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the IG2 fuse resistance.

      Standard resistance: Below 1 Ω 

    3. Reinstall the IG2 fuse.

    NG: CHECK FOR SHORTS IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE 

    OK: Go to Next Step 

  5. INSPECT IGNITION OR STARTER SWITCH ASSEMBLY 
    1. Inspect the ignition or starter switch assembly (See INSPECTION ).

    NG: REPLACE IGNITION OR STARTER SWITCH ASSEMBLY (See  REMOVAL  ) 

    OK: Go to Next Step 

  6. INSPECT ECM (MREL VOLTAGE) 
    1. Turn the ignition switch to the ON position.
    2. Measure the voltage between the terminals of the ECM connectors.
      Fig 5: Identifying E6 And E4 Connectors Terminals
      G05128693Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      MREL (E4-8) - E1 (E6-1) 9 to 14 V

    NG: REPLACE ECM (See  REMOVAL   ) 

    OK: Go to Next Step 

  7. CHECK FUSE (EFI FUSE) 
    1. Remove the EFI fuse from the engine room J/B.
      Fig 6: Identifying EFI Fuse
      G05128552Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the EFI fuse resistance.

      Standard resistance: Below 1 Ω 

    3. Reinstall the EFI fuse.

    NG: CHECK FOR SHORTS IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE 

    OK: Go to Next Step 

  8. INSPECT EFI RELAY 
    1. Remove the EFI relay from the engine room J/B.
      Fig 7: Identifying EFI Main Relay Connector Terminals
      G04942983Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the EFI relay resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      3 - 5 10 kΩ or higher
      3 - 5 Below 1Ω (when battery voltage applied to terminals 1 and 2)
    3. Reinstall the EFI relay.

    NG: REPLACE EFI MAIN RELAY 

    OK: Go to Next Step 

  9. CHECK HARNESS AND CONNECTOR (EFI RELAY - ECM, EFI RELAY - BODY GROUND) 
    1. Check the harness and connector between the EFI relay and ECM.
      1. Remove the EFI relay from the engine room J/B.
      2. Disconnect the ECM connector.
      3. Measure the resistance between the terminals.

        Standard resistance: 

        Check for open 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Specified Condition
        EFI relay terminal (1) - MREL (E4-8) Below 1 Ω

        Check for short 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Specified Condition
        EFI relay terminal (1) or MREL (E4-8) - Body ground 10 kΩ or higher
    2. Check the harness and connector between the EFI relay and body ground.
      1. Measure the resistance between the terminals.
        Fig 8: Checking Harness And Connector (EFI Relay - ECM, EFI Relay - Body Ground)
        G05128696Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard resistance: 

        Check for open 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Specified Condition
        EFI relay terminal (2) - Body ground Below 1 Ω
      2. Reinstall the EFI relay to the engine room J/B.
      3. Reconnect the ECM connector.

    OK: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    NG: CHECK AND REPLACE HARNESS AND CONNECTOR (TERMINAL +B OF ECM - BATTERY POSITIVE TERMINAL) 

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