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Inspection Procedure

  1. INSPECT INTEGRATION RELAY (POWER SOURCE) 
    1. Remove the integration relay from the engine room relay block.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Condition Specified Condition
      1E-1 - Body ground Always 11 to 14 V
    3. Reinstall the integration relay.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (INTEGRATION RELAY - BATTERY) 

    Fig 1: Identifying Engine Room Relay Block
    G06007540Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  2. INSPECT FUSES (EFI MAIN, IG2, AND EFI NO. 1 FUSES) 
    1. Remove the EFI MAIN fuse, IG2 fuse and EFI No. 1 fuse from the engine room relay block.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      EFI MAIN fuse Always Below 1 Ω
      IG2 fuse
      EFI No. 1 fuse
    3. Reinstall the fuses.

    NG: REPLACE FUSE (EFI MAIN, IG2 OR EFI NO. 1 FUSE) 

    Fig 2: Identifying Engine Room Relay Block
    G06040236Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  3. INSPECT INTEGRATION RELAY (EFI MAIN RELAY AND IG2 RELAY) 
    1. Remove the integration relay from the engine room relay block.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      1E-1 - 1B-4 When battery voltage absent 10 kΩ or higher
      When battery voltage applied to terminals 1B-2 and 1B-3 Below 1 Ω
      1E-1 - 1A-4 When battery voltage absent 10 kΩ or higher
      When battery voltage applied to terminals 1A-2 and 1A-3 Below 1 Ω
    3. Reinstall the integration relay.

    NG: REPLACE INTEGRATION RELAY  (See INTEGRATION RELAY )

    Fig 3: Identifying Integration Relay Connector Terminal
    G05386859Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - ECM) 
    1. Remove the integration 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) 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      A37-44 (MREL) - 1B-2 Always Below 1 Ω
      A37-2 (+B) - 1B-4 Always Below 1 Ω
      A37-1 (+B2) - 1B-4 Always Below 1 Ω

      Standard Resistance (Check for Short) 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      A37-44 (MREL) - Body ground Always 10 kΩ or higher
      A37-2 (+B) - Body ground Always 10 kΩ or higher
      A37-1 (+B2) - Body ground Always 10 kΩ or higher
    4. Reinstall the integration relay.
    5. Reconnect the ECM connector.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (INTEGRATION RELAY - ECM) 

    Fig 4: Identifying Engine Room Relay Block
    G06040238Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  5. 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) 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      B29-104 (E1) - Body ground Always Below 1 Ω
    3. Reconnect the ECM connector.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - BODY GROUND) 

    Fig 5: Identifying ECM Connector Terminal
    G06040239Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

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

      Standard Voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Condition Specified Condition
      A37-28 (IGSW) - B29-104 (E1) Ignition switch ON 11 to 14 V
    4. Reconnect the ECM connectors.

    NG: Go to step 7 

    Fig 6: Identifying ECM Connector Terminal
    G06040240Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE ECM  (See ECM )

  7. 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 

      RESISTANCE REFERENCE

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

    NG: REPLACE FUSE (IGN FUSE) 

    Fig 7: Identifying Driver Side Junction Block
    G06040241Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  8. CHECK HARNESS AND CONNECTOR (ECM - INTEGRATION RELAY) 
    1. Remove the integration 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) 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      A37-28 (IGSW) - 1A-4 Always Below 1 Ω

      Standard Resistance (Check for Short) 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      A37-28 (IGSW) - Body ground Always 10 kΩ or higher
    4. Reinstall the integration relay.
    5. Reconnect the ECM connector.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - INTEGRATION RELAY) 

    Fig 8: Identifying Integration Relay
    G06040242Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  9. INSPECT FUSE (IG2 NO. 2 FUSE) 
    1. Remove the IG2 No. 2 fuse from the engine room relay block.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      IG2 No. 2 fuse Always Below 1 Ω
    3. Reinstall the fuse.

    NG: REPLACE FUSE (IG2 NO. 2 FUSE) 

    Fig 9: Identifying Engine Room Relay Block
    G06007548Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  10. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - IGNITION SWITCH) 
    1. Remove the integration relay from the engine room relay block.
    2. Disconnect the ignition switch connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open) 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      1A-2 - E5-6 (IG2) Always Below 1 Ω
      1A-3 -Body ground Always Below 1 Ω

      Standard Resistance (Check for Short) 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      E5-6 (IG2) - Body ground Always 10 kΩ or higher
    4. Reinstall the integration relay.
    5. Reconnect the ignition switch connector.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (INTEGRATION RELAY - ECM) 

    Fig 10: Identifying Engine Room Relay Block
    G06040244Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  11. INSPECT IGNITION SWITCH 
    1. Remove the ignition switch.
    2. Measure the resistance according to the value(s) in the table below.
      Fig 11: Inspecting Ignition Switch
      G06040245Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance 

      RESISTANCE REFERENCE

      Tester Connection Switch Condition Specified Condition
      All Terminals LOCK 10 kΩ or higher
      2 (AM1) - 3 (ACC) ACC Below 1 Ω
      2 (AM1) - 3 (ACC) - 4 (IG1) ON
      7 (AM2) - 6 (IG2)
      2 (AM1) - 4 (IG1) - 1 (ST1) START
      7 (AM2) - 6 (IG2) - 8 (ST2)
    3. Reinstall the ignition switch.

    NG: REPLACE IGNITION SWITCH  (See IGNITION SWITCH )

    OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION SWITCH - BATTERY) 

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