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Inspection Procedure

  1. INSPECT FUSES (P/l, AM2, IG2, EFI MAIN, IGN) 
    1. Remove the P/l fuse, AM2 fuse, IG2 fuse and EFI MAIN fuse from the engine room No. 1 relay block.
      Fig 1: Removing P/I Fuse, AM2 Fuse, IG2 Fuse And EFI Main Fuse From Engine Room No. 1 Relay Block
      G05183768Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the IGN fuse from the instrument panel junction block.
    3. Measure the resistance of the fuses.

      Standard resistance: 

      Below 1 Ω 

    4. Reinstall the fuses.

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

    Fig 2: Identifying Instrument Panel Junction Block Fuse
    G05183769Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO to next step 

  2. INSPECT RELAY (IG2, EFI MAIN) 
    1. Remove the integration relay and IG2 relay from the engine room No. 1 relay block.
    2. Measure the resistance between the terminal of the integration relay.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connections Specified Conditions
      1C-1 - 1A-4 10 kΩ or higher
      Below 1 Ω (When battery voltage is applied to terminals 1A-2 and 1A-3)
      Fig 3: Identifying Integration Relay
      G05183483Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance between the terminal of the IG2 relay.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

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

    NG: REPLACE RELAY 

    Fig 4: Checking Opening Relay Resistance Circuit
    G04942983Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO to next step 

  3. CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND) 
    1. Disconnect the B30 ECM connector.
    2. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      B30-104 (E1) - Body ground Below 1 Ω
    3. Reconnect the ECM connector.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 5: Checking Harness And Connector (ECM - Body Ground)
    G05183772Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO to next step 

  4. INSPECT ECM (IGSW VOLTAGE) 
    1. Disconnect the B30 and A9 ECM connectors.
    2. Turn the ignition switch ON.
    3. Measure the voltage between the terminals of the B30 and A9 ECM connectors.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connections Specified Conditions
      A9-28 (IGSW) - B30-104 (E1) 9 to 14 V
    4. Reconnect the ECM connector.

    OK: REPLACE ECM 

    Fig 6: Inspecting ECM (IGSW Voltage)
    G05183773Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: GO to next step 

  5. CHECK HARNESS AND CONNECTOR (RELAY BLOCK - ECM, IGNITION SWITCH, BATTERY) 
    1. Disconnect the A9 ECM connector.
      Fig 7: Identifying ECM Connector Terminals
      G05183774Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the E3 ignition switch connector.
    3. Disconnect the battery positive terminal.
      Fig 8: Identifying E3 Ignition Switch Connector Terminals
      G05183775Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Remove the AM2 fuse and IG2 relay.
    5. Measure the resistance between the terminals.

      Standard resistance (Check for open) 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connections Specified Conditions
      A9-28 (IGSW) - Engine room No. 1 relay block IG2 relay terminal 5 Below 1 Ω
      Engine room No. 1 relay block IG2 relay terminal 2 - Body ground Below 1 Ω
      Positive (+) battery cable - Engine room relay block No. 1 AM2 fuse terminal 1 Below 1 Ω
      Positive (+) battery cable - Engine room relay block No. 1 IG2 relay terminal 3 Below 1 Ω
      E3-7 (AM2) - Engine room No. 1 relay block AM2 fuse terminal 2 Below 1 Ω
      E3-6 (IG2) - Engine room No. 1 relay block IG2 relay terminal 1 Below 1 Ω
      Fig 9: Removing AM2 Fuse And IG2 Relay
      G05183776Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance (Check for short) 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connections Specified Conditions
      A9-28 (IGSW) or Engine room No. 1 relay block IG2 relay terminal S-Body ground 10 kΩ or higher
      Positive (+) battery cable or Engine room No. 1 relay block AM2 fuse terminal 1 - Body ground 10 kΩ or higher
      Positive (+) battery cable or Engine room No. 1 relay block IG2 relay terminal 3 - Body ground 10 kΩ or higher
      E3-7 (AM2) or Engine room No. 1 relay block AM2 fuse terminal 2 -Body ground 10 kΩ or higher
      E3-6 (IG2) or Engine room No. 1 relay block IG2 relay terminal 1 - Body ground 10 kΩ or higher
    6. Reinstall the relay and fuse.
    7. Reconnect the connectors.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: GO to next step 

  6. INSPECT IGNITION SWITCH  (see INSPECTION PROCEDURE )

    NG: REPLACE IGNITION SWITCH 

    OK: GO to next step 

  7. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - ECM, BATTERY, BODY GROUND) 
    1. Disconnect the A9 ECM connector.
      Fig 10: Identifying A9 ECM Connector Terminals
      G05183777Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the integration relay from the engine room No. 1 relay block.
    3. Disconnect the integration relay connector.
    4. Remove the P/l fuse from the engine room No. 1 relay block.
    5. Check the resistance between the terminals.

      Standard resistance (Check for open) 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connections Specified Conditions
      A9-2 (+B) - 1A-4 Below 1 Ω
      A9-1 (+B2) - 1A-4 Below 1 Ω
      A9-44 (MREL) - 1A-2 Below 1 Ω
      Engine room relay block No. 1 P/l fuse terminal 2 - 1C-1 Below 1 Ω
      1A-3 - Body ground Below 1 Ω
      Fig 11: Removing Integration Relay From Engine Room No. 1 Relay Block
      G05183778Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance (Check for short) 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connections Specified Conditions
      A9-2 (+B) or 1A-4 - Body ground 10 kΩ or higher
      A9-1 (+B2) or 1A-4 - Body ground 10 kΩ or higher
      A9-44 (MREL) or 1A-2 - Body ground 10 kΩ or higher
      Engine room No. 1 relay block P/I fuse terminal 2 or 1C-1 - Body ground 10 kΩ or higher
    6. Reconnect the connectors.
    7. Reinstall the integration relay and P/l fuse.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPAIR OR REPLACE ENGINE ROOM NO. 1 RELAY BLOCK 

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