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Home >> Toyota >> 2011 >> Highlander Hybrid Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 85 (Cooling Fan System (2GR-FE) (Inspection)) >> Cooling Fan System >> Cooling Fan Circuit >> Procedure

Cooling Fan Circuit: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE COOLING FAN) 
    1. Connect Techstream to the DLC3.
    2. Turn the ignition switch on (IG).
    3. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Cooling Fan.
    4. Check the operation of the cooling fan while operating it using Techstream.

      OK

      The cooling fan rotates.

    NG → See step   3 

    OK → See step   2 

  2. REPLACE ECM. Refer to  REMOVAL 
  3. CHECK HARNESS AND CONNECTOR (ECM - COOLING FAN ECU) 
    1. Disconnect the D61 connector from the ECM.
    2. Disconnect the cooling fan ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      D61-6 (RFC) - A9-2 (SI) Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  4. INSPECT NO. 1 COOLING FAN MOTOR 
    1. Disconnect the No. 1 cooling fan motor connector.
      Fig 1: Identifying No. 1 Cooling Fan Motor Connector
      GTY305624Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the battery positive terminal to terminal 2 of the cooling fan connector, and connect the battery negative terminal to terminal 1 of the No. 1 cooling fan motor connector.

      OK

      The No. 1 cooling fan rotates.

    NG → See step   8 

    OK: Go to next step 

  5. INSPECT NO. 2 COOLING FAN MOTOR 
    1. Disconnect the No. 2 cooling fan motor connector.
      Fig 2: Identifying No. 2 Cooling Fan Motor Connector
      GTY302705Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the battery positive terminal to terminal 2 of the cooling fan connector, and connect the battery negative terminal to terminal 1 of the No. 2 cooling fan motor connector.

      OK

      The No. 2 cooling fan rotates.

    NG → See step   9 

    OK: Go to next step 

  6. CHECK COOLING FAN ECU (POWER SOURCE) 
    1. Disconnect the cooling fan ECU connector.
      Fig 3: Identifying A9 Cooling Fan ECU Connector
      GTY193858Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the ignition switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard voltage

      Tester Connection Switch Condition Specified Condition
      A9-3 (+B1) - A9-1 (E1) Ignition switch on (IG) 11 to 14 V

    NG → See step   10 

    OK → See step   7 

  7. REPLACE COOLING FAN ECU. Refer to  REMOVAL 
  8. REPLACE NO. 1 COOLING FAN MOTOR. Refer to  REMOVAL 
  9. REPLACE NO. 2 COOLING FAN MOTOR. Refer to  REMOVAL 
  10. CHECK HARNESS AND CONNECTOR (COOLING FAN ECU - BODY GROUND) 
    1. Disconnect the cooling fan ECU connector.
      Fig 4: Identifying A9 Cooling Fan ECU Connector
      GTY175315Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      A9-1 (E1) - Body ground Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  11. INSPECT FAN MAIN RELAY 
    1. Remove the FAN MAIN relay from the engine room relay block and junction block.
      Fig 5: FAN MAIN Relay Circuit Diagram
      GTY193860Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      3 - 5 Battery voltage is not applied between terminals 1 and 2 10 kΩ or higher
      3 - 5 Apply battery voltage between terminals 1 and 2 Below 1 Ω

    NG → REPLACE FAN MAIN RELAY 

    OK: Go to next step 

  12. CHECK HARNESS AND CONNECTOR (COOLING FAN ECU - FAN MAIN RELAY) 
    1. Disconnect the cooling fan ECU connector.
    2. Remove the FAN MAIN relay from the engine room relay block and junction block.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      A9-3 (+B1) - 5 (FAN MAIN relay) Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  13. CHECK HARNESS AND CONNECTOR (FAN MAIN RELAY - BODY GROUND) 
    1. Remove the FAN MAIN relay from the engine room relay block and junction block.
      Fig 6: Identifying FAN MAIN Relay
      GTY187915Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      2 (FAN MAIN relay) - Body ground Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  14. CHECK HARNESS AND CONNECTOR (FAN MAIN RELAY - FAN MAIN FUSE) 
    1. Remove the FAN MAIN relay from the engine room relay block and junction block.
    2. Remove the fusible link block assembly from the engine room relay block and junction block.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      3 (FAN MAIN relay) - 1 (FAN MAIN fuse) Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  15. INSPECT FUSIBLE LINK BLOCK ASSEMBLY (FAN MAIN FUSE) 
    1. Remove the fusible link block assembly from the engine room relay block and junction block.
      Fig 7: Identifying Fusible Link Block Assembly
      GTY183683Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      1 - 2 (FAN MAIN fuse) Always Below 1 Ω

    NG → REPLACE FUSIBLE LINK BLOCK ASSEMBLY 

    OK: Go to next step 

  16. CHECK FUSE (EFI MAIN) 
    1. Remove the EFI MAIN fuse from the engine room relay block and junction block.
      Fig 8: Identifying EFI MAIN Fuse
      GTY175856Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Measure the resistance according to the value(s) in the table below.

        Standard resistance

        Tester Connection Condition Specified Condition
        EFI MAIN fuse Always Below 1 Ω

    NG → REPLACE FUSE 

    OK: Go to next step 

  17. CHECK HARNESS AND CONNECTOR (EFI MAIN FUSE - ENGINE ROOM JUNCTION BLOCK ASSEMBLY) 
    1. Remove the EFI MAIN fuse from the engine room relay block and junction block.
    2. Remove the engine room junction block assembly from the engine room relay block and junction block.
      Fig 9: Identifying EFI MAIN Fuse
      GTY193876Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the 2E connector from the engine room junction block assembly.
    4. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      2 (EFI MAIN fuse) - 2E-12 Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  18. CHECK HARNESS AND CONNECTOR (FAN MAIN RELAY - ENGINE ROOM JUNCTION BLOCK ASSEMBLY) 
    1. Remove the FAN MAIN relay from the engine room relay block and junction block.
    2. Remove the engine room junction block assembly from the engine room relay block and junction block.
      Fig 10: Identifying EFI MAIN Fuse
      GTY193876Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the 2E connector from the engine room junction block assembly.
    4. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      1 (FAN MAIN reray) - 2E-7 Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  19. CHECK HARNESS AND CONNECTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY - BODY GROUND) 
    1. Remove the engine room junction block assembly from the engine room relay block and junction block.
      Fig 11: Identifying Engine Room Relay Block & Junction Block
      GTY193880Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the 2D and 2E connectors from the engine room junction block assembly.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      2E-11 - Body ground Always Below 1 Ω
      2E-10 - Body ground Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  20. CHECK HARNESS AND CONNECTOR (ECM - ENGINE ROOM JUNCTION BLOCK ASSEMBLY) 
    1. Disconnect the D31 connector from the ECM.
    2. Remove the engine room junction block assembly from the engine room relay block and junction block.
      Fig 12: Identifying EFI MAIN Fuse
      GTY193876Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the 2E connector from the engine room junction block assembly.
    4. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      D61-9 (MREL) - 2E-9 Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  21. INSPECT ENGINE ROOM JUNCTION BLOCK ASSEMBLY (EFI RELAY) 
    1. Remove the engine room junction block assembly from the engine room relay block and junction block.
      Fig 13: Locating Engine Room Junction Block Assembly Connectors
      GTY193978Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.
      Fig 14: Identifying 2E Connector Terminals
      GTY190201Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance

      Tester Connection Condition Specified Condition
      2E-12 - 2E-7 Battery voltage is not applied between terminals 2E-9 and 2E-10 10 kΩ or higher
      2E-12 - 2E-7 Apply battery voltage between terminals 2E-9 and 2E-10 Below 1 Ω
      NOTE:

      While using the battery for the inspection, do not bring the positive and negative tester probes too close to each other as a short circuit may occur.

    NG → See step   23 

    OK → See step   22 

  22. REPLACE ECM. Refer to  REMOVAL 
  23. REPLACE ENGINE ROOM JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL 
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