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Inspection Procedure

  1. INSPECT ECM (+B VOLTAGE) 
    1. Turn the ignition switch to ON.
    2. Measure the voltage between the terminals of the E3 and E6 ECM connectors.

      Standard: 

      SPECIFIED CONDITIONS

      Tester Connections Specified Conditions
      +B(E6-1)-E1(E3-5) Between 9 V and 14 V
      Fig 1: Measuring Voltage Between Terminals Of E3 And E6 ECM Connectors
      G02599084Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  
    2. NG: GO TO NEXT STEP 
  2. CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND) 
    1. Disconnect the negative battery cable.
    2. Disconnect the E3 ECM connector.
    3. Check the resistance.

      Standard (Check for open): 

      SPECIFIED CONDITIONS

      Tester Connections Specified Conditions
      E1 (E3-5) - Body ground Below 1 Ω
    4. Reconnect the ECM connector.
    5. Reconnect the negative battery cable.
      Fig 2: Identifying E3 ECM Connector Location
      G02599085Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP 
  3. INSPECT ECM (IGSW VOLTAGE) 
    1. Turn the ignition switch to ON.
    2. Measure the voltage between the terminals of the E3 and E6 ECM connectors.

      Standard: 

      SPECIFIED CONDITIONS

      Tester Connections Specified Conditions
      IGSW (E6-9) - E1 (E3-5) Between 9 V and 14 V
      Fig 3: Measuring Voltage Between Terminals Of E3 And E6 ECM Connectors
      G02599086Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: Go to step   6 
    2. NG: GO TO NEXT STEP 
  4. CHECK FUSE (AM2) 
    1. Remove the AM2 fuse from the instrument panel J/B.
    2. Check the AM2 fuse resistance.

      Standard: Below 1Ω 

    3. Reinstall the AM2 fuse.
      Fig 4: Removing AM2 Fuse From Instrument Panel J/B
      G02599087Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: CHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED TO FUSE 
    2. OK: GO TO NEXT STEP 
  5. INSPECT IGNITION OR STARTER SWITCH ASSY 
    1. Disconnect the 110 ignition switch connector.
    2. Check the resistance.

      Standard: 

      SPECIFIED CONDITIONS

      Switch Positions Tester Connections Specified Conditions
      LOCK All Terminals 10 k Ω or higher
      ACC 1-3 Below 1 Ω
      ON 1-2,1-3,2-3,5-6 Below 1 Ω
      START 1-2,4-5,4-6,5-6 Below 1 Ω
    3. Reconnect the ignition switch connector.
      Fig 5: Identifying Ignition Switch Connector Terminals
      G02599088Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE IGNITION OR STARTER SWITCH ASSY 
    2. 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 to ON.
    2. Measure the voltage between the terminals of the E3 and E6 ECM connectors.

      Standard: 

      SPECIFIED CONDITIONS

      Tester Connections Specified Conditions
      MREL(E6-8)-E1 (E3-5) Between 9 V and 14 V
      Fig 6: Measuring Voltage Between Terminals Of E3 And E6 ECM Connectors
      G02599089Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE ECM (See  ECM (1ZZ-FE/2ZZ-GE) REPLACEMENT  ) 
    2. OK: GO TO NEXT STEP 
  7. CHECK FUSE (EFI AND EFI2) 
    1. Remove the EFI and EFI2 fuses from the engine room R/B.
    2. Check the EFI and EFI2 fuses resistance.

      Standard: Below 1Ω 

    3. Reinstall the EFI and EFI2 fuses.
      Fig 7: Removing EFI And EFI2 Fuses From Engine Room R/B
      G02599090Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: CHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED TO FUSE 
    2. OK: GO TO NEXT STEP 
  8. INSPECT EFI RELAY 
    1. Remove the EFI relay from the engine room R/B.
    2. Check the EFI relay resistance.

      Standard: 

      SPECIFIED CONDITIONS

      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.
      Fig 8: Inspecting EFI Relay
      G02599091Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE EFI RELAY 
    2. 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 R/B.
      2. Disconnect the E6 ECM connector.
      3. Check the resistance.

        Standard (Check for open): 

        SPECIFIED CONDITIONS

        Tester Connections Specified Conditions
        Engine room R/B (EFI relay terminal 1) - MREL (E6-8) Below 1 Ω
        Engine room R/B (EFI relay terminal 3) - +B (E6-1) Below 1 Ω
        Fig 9: Removing EFI Relay From Engine Room R/B
        G02599092Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard (Check for short): 

        SPECIFIED CONDITIONS

        Tester Connections Specified Conditions
        Engine room R/B (EFI relay terminal 1) or MREL (E6-8) - Body ground 10 kΩ or higher
        Engine room R/B (EFI relay terminal 3) or +B (E6-1) - Body ground 10 kΩ or higher
      4. Reconnect the ECM connector.
      5. Reinstall the EFI relay.
    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.
        Fig 10: Identifying E6 ECM Connector Location
        G02599093Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard (Check for open): 

        SPECIFIED CONDITIONS

        Tester Connections Specified Conditions
        Engine room R/B (EFI relay terminal 2) - Body ground Below 1 Ω
      3. Reinstall the EFI relay.
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP 

      CHECK AND REPAIR HARNESS AND CONNECTOR (TERMINAL 5 OF EFI RELAY - BATTERY POSITIVE TERMINAL) 

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