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Home >> Toyota >> 2005 >> Camry Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (SFI) (2AZ-FE) - Diagnostics >> ECM Power Source Circuit >> Inspection Procedure
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Inspection Procedure

  1. INSPECT ECM (+B VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Check the voltage between of the E10 and E6 ECM connectors.

    Standard: 

    TESTER CONNECTION SPECIFIED CONDITION (1 OF 8)

    Tester Connection Specified Condition
    E6-1 (+B) - E10-3 (E1) 9 to 14 V
    1. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE   ) 
    Fig 1: Inspecting ECM (+B Voltage)
    G02627970Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: Go to Next Step. 

  2. CHECK WIRE HARNESS (ECM - BODY GROUND) 
    1. Disconnect the E10 ECM connector.
    2. Check the resistance of the wire harness side connectors.

    Standard: 

    TESTER CONNECTION SPECIFIED CONDITION (2 OF 8)

    Tester Connection Specified Condition
    E10-3 (E1) - Body ground Below 1 Ω
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    Fig 2: Disconnecting E10 ECM Connector
    G02627971Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to Next Step. 

  3. INSPECT ECM (IGSW VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Check the voltage of the E10 and E6 ECM connectors.

    Standard: 

    TESTER CONNECTION SPECIFIED CONDITION (3 OF 8)

    Tester Connection Specified Condition
    E6-9 (IGSW) -E10-3 (E1) 9 to 14 V
    1. OK: Go to step   6 
    Fig 3: Identifying E10 And E6 ECM Connectors
    G02627972Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: Go to Next Step. 

  4. CHECK FUSE (IGN) 
    1. Remove the IGN fuse from the engine room J/B.
    2. Check the resistance of the IGN fuse.

    Standard: Below 1 Ω 

    1. NG: REPLACE FUSE 
    Fig 4: Removing IGN Fuse From Engine Room J/B
    G02627973Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK:  Go to Next Step.

  5. INSPECT IGNITION OR STARTER SWITCH ASSY 
    1. Check the resistance of the ignition switch terminals.

    Standard: 

    TESTER CONNECTION SPECIFIED CONDITION (4 OF 8)

    Switch Condition Terminal Condition Specified Condition
    LOCK 6 (IG2) - 7 (AM2) 10 KΩ or higher
    ON 6 (IG2) - 7 (AM2) Below 1 Ω
    1. NG: REPLACE IGNITION OR STARTER SWITCH ASSY 
    Fig 5: Identifying Ignition Switch Connector
    G02627974Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to Next Step. 

    CHECK AND REPAIR HARNESS AND CONNECTOR (BATTERY - IGNITION SWITCH, IGNITION SWITCH - ECM) 

  6. INSPECT ECM (MREL VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Measure the voltage of the E10 and E6 ECM connectors.

    Standard: 

    TESTER CONNECTION SPECIFIED CONDITION (5 OF 8)

    Tester Connection Specified Condition
    E6-8 (MREL) - E10-3 (E1) 9 to 14 V
    1. NG: REPLACE ECM (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 
    Fig 6: Identifying E10 And E6 ECM Connectors
    G02627975Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to Next Step. 

  7. CHECK FUSE (EFI) 
    1. Remove the EFI fuse from the engine room J/B.
    2. Check the resistance of the EFI fuse.

    Standard: Below 1 Ω 

    1. NG: REPLACE FUSE 
    Fig 7: Removing EFI Fuse From Engine Room J/B
    G02627976Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to Next Step. 

  8. INSPECT RELAY (EFI) 
    1. Remove the EFI relay from the engine room J/B.
    2. Check the resistance of EFI the relay.

    Standard: 

    TESTER CONNECTION SPECIFIED CONDITION (6 OF 8)

    Tester Connection Specified Condition
    3-5 10KΩ or higher
    3-5 Below 1 Ω (when battery voltage is applied to terminals 1 and 2)
    1. NG: REPLACE RELAY 
    Fig 8: Identifying EFI relay
    G02627977Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to Next Step. 

  9. CHECK WIRE HARNESS (EFI RELAY - ECM, EFI RELAY - BODY GROUND) 
    1. Check the wire harness between the EFI relay and ECM.
      1. Remove the EFI relay from the engine room J/B.
      2. Disconnect the E6 ECM connector.
      3. Check the resistance of the wire harness side connectors.

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION (7 OF 8)

      Tester Connection Specified Condition
      J/B EFI relay terminal 1 - E6-8 (MREL) Below 1 Ω
      J/B EFI relay terminal 1 or E6-8 (MREL) - Body ground 10 KΩ or higher
    2. Check the wire harness between the EFI relay and body ground.
    1. Remove the EFI relay from the engine room J/B.
    2. Check the resistance of the wire harness side connector and the body ground.

    Standard: 

    TESTER CONNECTION SPECIFIED CONDITION (8 OF 8)

    Tester Connection Specified Condition
    J/B EFI relay terminal 2 - Body ground Below 1 Ω
    1. OK: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    Fig 9: Disconnecting E6 ECM Connector
    G02627978Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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