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Inspection Procedure

  1. INSPECT ECM (+B VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Measure the voltage between the terminals of the E8 and E6 ECM connectors.

      Standard Voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connections Specified Conditions
      +B (E8-1) - E1 (E6-1) 9 to 14 V
      Fig 1: Identifying E6 And E8 Connector
      G05676882Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

    NG: Go to next step. 

  2. CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND) 
    1. Disconnect the E6 ECM connector.
      2. Fig 2: Identifying E6 Connector
      G05676883Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the resistance.

      Standard Resistance (Check for open) 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connections Specified Conditions
      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 ON.
    2. Measure the voltage between the terminals of the E8 and E6 ECM connectors.

      Standard Voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connections Specified Conditions
      IGSW (E8-9) - E1 (E6-1) 9 to 14 V
      Fig 3: Identifying E6 And E8 Connector
      G05676884Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK:  Go to step  6

    NG: Go to next step. 

  4. CHECK FUSE (IGN FUSE) 
    1. Remove the IGN fuse from the driver side J/B.
      2. Fig 4: Identifying IGN Fuse Of Driver Side J/B
      G05676885Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the IGN fuse resistance.

      Standard Resistance: Below 1 Ω 

    3. Reinstall the IGN fuse.

    NG: CHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED TO FUSE 

    OK: Go to next step. 

  5. INSPECT IGNITION OR STARTER SWITCH ASSEMBLY 
    1. Disconnect the I7 ignition switch connector.
      2. Fig 5: Identifying I7 Ignition Switch Connector
      G05676886Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the resistance.

      Standard Resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Ignition Switch Positions Tester Connections Specified Conditions
      LOCK All Terminals 10 kΩ or higher
      ACC 2 - 4 Below 1 Ω
      ON 1 - 2, 1 - 4, 5 - 6
      START 1 - 3 - 4, 5 - 6 - 7
    3. Reconnect the ignition switch connector.

    NG: REPLACE IGNITION OR STARTER SWITCH ASSEMBLY 

    OK: CHECK AND REPLACE HARNESS AND CONNECTOR (BATTERY - IGNITION SWITCH, IGNITION SWITCH - ECM) 

  6. INSPECT ECM (MREL VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Measure the voltage between the terminals of the E6 and E8 ECM connectors.

      Standard Voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connections Specified Conditions
      MREL (E8-8) - E1 (E6-1) 9 to 14 V
      Fig 6: Identifying E6 And E8 ECM Connectors
      G05676887Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE ECM 

    OK: Go to next step. 

  7. CHECK FUSE (EFI FUSE) 
    1. Remove the EFI fuse from the engine room R/B.
      2. Fig 7: Identifying EFI Fuse And Engine Room R/B
      G05676888Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the EFI fuse resistance.

      Standard Resistance: Below 1 Ω 

    3. Reinstall the EFI fuse.

    NG: CHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED TO FUSE 

    OK: Go to next step. 

  8. INSPECT EFI RELAY 
    1. Remove the EFI relay from the engine room R/B.
      2. Fig 8: Identifying EFI Relay Terminals
      G05676889Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the EFI relay resistance.

      Standard Resistance 

      TESTER CONNECTION SPECIFIED CONDITION

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

    NG: REPLACE EFI 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.
      Fig 9: Identifying EFI Relay And ECM Connector
      G05676890Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Remove the EFI relay from the engine room R/B.
      2. Disconnect the E8 ECM connector.
      3. Check the resistance.

        Standard Resistance (Check for open) 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connections Specified Conditions
        EFI relay (1) - MREL (E8-8) Below 1 Ω

        Standard Resistance (Check for short) 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connections Specified Conditions
        EFI relay (1) or MREL (E8-8) - Body ground 10 kΩ or higher
      4. Reinstall the EFI relay.
      5. Reconnect the ECM connector.
    2. Check the harness and connector between the EFI relay and body ground.
      1. Remove the EFI relay from the engine room R/B.
      2. Check the resistance.

        Standard Resistance (Check for open) 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connections Specified Conditions
        EFI relay (2) - Body ground Below 1 Ω
      3. Reinstall the EFI relay.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

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