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Home >> Toyota >> 2009 >> RAV4 Base, 2.5 F, FWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (2AR-FE) - Service Information & Circuit Tests >> ECM Power Source Circuit >> Inspection Procedure
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Inspection Procedure

NOTE: Inspect the fuses of circuits related to this system before performing the following inspection procedure.
  1. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - BATTERY) 
    1. Remove the integration relay from the engine room No. 1 relay block.
    2. Disconnect the integration relay connector.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      Engine room relay block (1C-1) - Body ground Always 11 to 14 V
    4. Reinstall the integration relay.

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

      Fig 1: Identifying Integration Relay
      G05997104Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to Next Step 

  2. INSPECT INTEGRATION RELAY (EFI MAIN RELAY) 
    1. Inspect the EFI MAIN relay (See INTEGRATION RELAY  ).

      NG: REPLACE INTEGRATION RELAY 

      OK: Go to Next Step 

  3. CHECK HARNESS AND CONNECTOR (+B, +B2 AND MREL CIRCUIT) 
    1. Check the harness and connectors between the integration relay and ECM.
      1. Remove the integration relay from the engine room No. 1 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) 

        TESTER CONNECTION SPECIFIED CONDITION CHART

        Tester Connection Condition Specified Condition
        A9-6 (MREL) - 1A-2 Always Below 1 Ω
        A9-2 (+B) - 1A4 Always
        A9-1 (+B2) - 1A-4 Always

        Standard Resistance (Check for short) 

        TESTER CONNECTION SPECIFIED CONDITION CHART

        Tester Connection Condition Specified Condition
        A9-6 (MREL) or 1A-2 - Body ground Always 10 kΩ or higher
        A9-2 (+B) or 1A-4 - Body ground Always
        A9-1 (+B2) or 1A-4 - Body ground Always
    2. Check the harness and connectors between the integration relay and body ground.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance (Check for open) 

        TESTER CONNECTION SPECIFIED CONDITION CHART

        Tester Connection Condition Specified Condition
        1A-3 - Body ground Always Below 1 Ω
        Fig 2: Identifying Integration Relay And ECM Connector
        G05997105Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Reinstall the integration relay.
    4. Reconnect the ECM connector.

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to Next Step 

  4. 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) 

      TESTER CONNECTION SPECIFIED CONDITION CHART

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

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      Fig 3: Identifying B30 ECM Connector
      G05997106Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to Next Step 

  5. INSPECT ECM (IGSW 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 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      IGSW (A9-28) - E1 (B30-104) Ignition switch ON 9 to 14 V
    4. Reconnect the ECM connectors.

      OK: REPLACE ECM  (See REMOVAL  )

      Fig 4: Identifying ECM Connector
      G05997107Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: Go to Next Step 

  6. INSPECT RELAY (IG2 RELAY POWER SOURCE) 
    1. Remove the IG2 relay from the engine room No. 1 relay block.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      IG2 relay (3) - Body ground Always 11 to 14 V

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (IG2 RELAY - BATTERY) 

      Fig 5: Identifying IG2 Relay
      G05997108Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to Next Step 

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

      Standard Resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      3 - 5 Battery voltage not applied to terminal 1 and 2 10 kΩ or higher
      3 - 5 Battery voltage applied to terminal 1 and 2 Below 1 Ω
      Fig 6: IG2 Relay Circuit Diagram
      G04942976Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Reinstall the relay.

      NG: REPLACE IG2 RELAY 

      OK: Go to Next Step 

  8. CHECK HARNESS AND CONNECTOR (ECM - ENGINE ROOM NO. 1 RELAY BLOCK) 
    1. Remove the IG2 relay from the engine room No. 1 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) 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      IG2 relay (5) - A9-28 (IGSW) Always Below 1 Ω

      Standard Resistance (Check for short) 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      IG2 relay (5) or A9-28 (IGSW) - Body ground Always 10 kΩ or higher
    4. Reinstall the IG2 relay.
    5. Reconnect the ECM connector.

      Result 

      RESULT CHART

      Result Proceed to
      Out of normal range A
      Within normal range (w/ Smart Key System) B
      Within normal range (w/o Smart Key System) C

      B: Go to step 9 

      C: Go to step  10

      Fig 7: Identifying IG2 Relay And ECM Connector
      G05997110Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      A: REPAIR OR REPLACE HARNESS OR CONNECTOR 

  9. CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 1 RELAY BLOCK - MAIN BODY ECU) 
    1. Remove the IG2 relay from the engine room No. 1 relay block.
    2. Remove the instrument panel junction block (main body ECU).
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for open) 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      IG2 relay (1) - E16-5 (IG2D) Always Below 1 Ω
      IG2 relay (2) - Body ground Always Below 1 Ω

      Standard Resistance (Check for short) 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      IG2 relay (1) - E16-5 (IG2D) - Body ground Always 10 kΩ or higher
    4. Reinstall the IG2 relay.
    5. Reconnect the main body ECU.

      OK: CHECK SMART KEY SYSTEM  (See POWER SOURCE MODE DOES NOT CHANGE )

      Fig 8: Identifying IG2 Relay And Main Body ECU
      G05997111Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

  10. CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 1 RELAY BLOCK - IGNITION SWITCH) 
    1. Remove the IG2 relay from the engine room No. 1 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) 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      IG2 relay (1) - E3-6 (IG2) Always Below 1 Ω
      IG2 relay (2) - Body ground Always Below 1 Ω

      Standard Resistance (Check for short) 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      IG2 relay (1) or E3-6 (IG2) - Body ground Always 10 kΩ or higher
    4. Reinstall the IG2 relay.
    5. Reconnect the ignition switch connector.

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      Fig 9: Identifying IG2 Relay And Ignition Switch Connector
      G05997112Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to Next Step 

  11. INSPECT IGNITION SWITCH ASSEMBLY 
    1. Inspect the ignition switch assembly (See INSPECTION ).

      NG: REPLACE IGNITION SWITCH ASSEMBLY  (See IGNITION SWITCH )

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

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