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Inspection Procedure

  1. INSPECT ECM (+B VOLTAGE) 
    1. Turn the ignition switch to ON.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      STANDARD VOLTAGE SPECIFICATION

      Tester Connection Switch Condition Specified Condition
      E13-22 (+B) - E11-12 (E1) Ignition switch ON 11 to 14 V

      NG: Go to step 2 

      Fig 1: Identifying E13 And E11 ECM Connector
      G06080186Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

  2. CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND) 
    1. Disconnect the ECM connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open) 

      STANDARD RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      E11-12 (E1) - Body ground Always Below 1 Ω
    3. Reconnect the ECM connector.

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      Fig 2: Identifying E11 ECM Connector
      G06080187Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to Next Step 

  3. INSPECT ECM (IGSW VOLTAGE) 
    1. Turn the ignition switch to ON.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      STANDARD VOLTAGE SPECIFICATION

      Tester Connection Switch Condition Specified Condition
      E14-21 (IGSW) - E11-12 (E1) Ignition switch ON 11 to 14 V

      NG:  Go to step  8

      Fig 3: Identifying E14 And E11 ECM Connector
      G06080188Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to Next Step 

  4. INSPECT ECM (MREL VOLTAGE) 
    1. Turn the ignition switch to ON.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      STANDARD VOLTAGE SPECIFICATION

      Tester Connection Switch Condition Specified Condition
      E13-9 (MREL) - E11-12 (E1) Ignition switch ON 11 to 14 V

      NG: REPLACE ECM  (See ECM  )

      Fig 4: Identifying E13 And E11 ECM Connector
      G06080189Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to Next Step 

  5. INSPECT FUSE (EFI FUSE) 
    1. Remove the EFI fuse from the engine room relay block.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      STANDARD RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      EFI fuse Always Below 1 Ω
    3. Reinstall the EFI fuse.

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

      Fig 5: Identifying EFI Fuse
      G06080190Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to Next Step 

  6. INSPECT EFI RELAY 
    1. Remove the EFI relay from the engine room relay block.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      STANDARD RESISTANCE SPECIFICATION

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

      NG: REPLACE EFI RELAY 

      Fig 6: Inspecting EFI Relay
      G04942976Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to Next Step 

  7. 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 relay block.
      2. Disconnect the ECM connector.
      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance (Check for Open) 

        STANDARD RESISTANCE SPECIFICATION

        Tester Connection Condition Specified Condition
        1 (EFI relay) - E13-9 (MREL) Always Below 1 Ω

        Standard Resistance (Check for Short) 

        STANDARD RESISTANCE SPECIFICATION

        Tester Connection Condition Specified Condition
        1 (EFI relay) or E13-9 (MREL) - Body ground Always 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 relay block.
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance (Check for Open) 

        STANDARD RESISTANCE SPECIFICATION

        Tester Connection Condition Specified Condition
        2 (EFI relay) - Body ground Always Below 1 Ω
      3. Reinstall the EFI relay.

        NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

        Fig 7: Identifying EFI Relay And E13 ECM Connector
        G06080192Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

  8. INSPECT FUSE (IGN FUSE) 
    1. Remove the IGN fuse from the driver side junction block.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      STANDARD RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      IGN fuse Always Below 1 Ω
    3. Reinstall the IGN fuse.

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

      Fig 8: Identifying IGN Fuse
      G06080193Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to Next Step 

  9. INSPECT IGNITION OR STARTER SWITCH ASSEMBLY 
    1. Disconnect the ignition switch connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      STANDARD RESISTANCE SPECIFICATION

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

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

      Fig 9: Identifying Ignition Switch Connector
      G06080194Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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