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Cooling Fan Circuit [12/2022 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. PERFORM ACTIVE TEST USING GTS (CONTROL THE ENGINE COOLING FAN) 
    1. Perform the Active Test according to the display on the GTS.

      Powertrain > Engine > Active Test 

      Tester Display
      Control the Engine Cooling Fan

      OK

      Active Tester Operation Fan Operation
      HIGH Cooling fans high speed operate
      LOW Cooling fans low speed operate
      OFF Cooling fans stop

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

    Refer to PROBLEM SYMPTOMS TABLE [12/2022 - ] 

    Result: 

    NG 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (FANL - FANH POWER SOURCE) 
    1. Disconnect the A92 ECM connector.
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      A92-32 (FANH) - Body ground Ignition switch ON 11 to 14 V
      A92-33 (FANL) - Body ground Ignition switch ON 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  12

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (FAN NO. 1 RELAY AND FAN NO. 3 RELAY POWER SOURCE CIRCUIT) 
    1. Remove the FAN NO. 1 relay and FAN NO. 3 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      3 (FAN NO. 1 relay) - Body ground Always 11 to 14 V
      3 (FAN NO. 3 relay) - Body ground Always 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (FAN NO. 1 RELAY AND FAN NO. 3 RELAY POWER SOURCE CIRCUIT) 

    Result: 

    OK 

    See step  4

  4. INSPECT COOLING FAN RELAY (FAN NO. 1, FAN NO. 2 AND FAN NO. 3) 
    1. Inspect the FAN NO. 1 relay, FAN NO. 2 relay and FAN NO. 3 relay.

      Refer to ON-VEHICLE INSPECTION [12/2022 - ]

      Result

      Result Proceed to
      OK A
      NG (FAN NO. 1 relay) B
      NG (FAN NO. 2 relay) C
      NG (FAN NO. 3 relay) D

    Result: 

    B 

    REPLACE FAN NO. 1 RELAY 

    Result: 

    C 

    REPLACE FAN NO. 2 RELAY 

    Result: 

    D 

    REPLACE FAN NO. 3 RELAY 

    Result: 

    A 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (FAN NO. 2 RELAY - BODY GROUND) 
    1. Remove the FAN NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      5 (FAN NO. 2 relay) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (FAN NO. 2 RELAY - BODY GROUND) 

    Result: 

    OK 

    See step  6

  6. INSPECT COOLING FAN MOTOR RH 
    1. Inspect the cooling fan motor RH.

      Refer to ON-VEHICLE INSPECTION [12/2022 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE COOLING FAN MOTOR RH 

    Refer to REMOVAL [12/2022 - ]

    Result: 

    OK 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (COOLING FAN MOTOR RH - BODY GROUND) 
    1. Disconnect the A24 cooling fan motor RH connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      A24-1 - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (COOLING FAN MOTOR RH - BODY GROUND) 

    Result: 

    OK 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (FAN NO. 1 RELAY AND FAN NO. 2 RELAY - COOLING FAN MOTOR RH) 
    1. Disconnect the A24 cooling fan motor RH connector.
    2. Remove the FAN NO. 1 relay and FAN NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      A24-2 - 5 (FAN NO. 1 relay) Always Below 1 Ω
      A24-2 - 4 (FAN NO. 2 relay) Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      A24-2 or 5 (FAN NO. 1 relay) - Body ground Always 10 kΩ or higher
      A24-2 or 4 (FAN NO. 2 relay) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (FAN NO. 1 RELAY AND FAN NO. 2 RELAY - COOLING FAN MOTOR RH) 

    Result: 

    OK 

    See step  9

  9. INSPECT COOLING FAN MOTOR LH 
    1. Inspect the cooling fan motor LH.

      Refer to ON-VEHICLE INSPECTION [12/2022 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE COOLING FAN MOTOR LH 

    Refer to REMOVAL [12/2022 - ]

    Result: 

    OK 

    See step  10

  10. CHECK HARNESS AND CONNECTOR (FAN NO. 2 RELAY AND FAN NO. 3 RELAY - COOLING FAN MOTOR LH) 
    1. Disconnect the A25 cooling fan motor LH connector.
    2. Remove the FAN NO. 2 relay and FAN NO. 3 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      A25-1 - 3 (FAN NO. 2 relay) Always Below 1 Ω
      A25-2 - 5 (FAN NO. 3 relay) Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      A25-1 or 3 (FAN NO. 2 relay) - Body ground Always 10 kΩ or higher
      A25-2 or 5 (FAN NO. 3 relay) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (FAN NO. 2 RELAY AND FAN NO. 3 RELAY - COOLING FAN MOTOR LH) 

    Result: 

    OK 

    See step  11

  11. CHECK HARNESS AND CONNECTOR (FAN NO. 1 RELAY - FAN NO. 2 RELAY) 
    1. Remove the FAN NO. 1 and FAN NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      1 (FAN NO. 1 relay) - 1 (FAN NO. 2 relay) Always Below 1 Ω
      2 (FAN NO. 1 relay) - 2 (FAN NO. 2 relay) Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      1 (FAN NO. 1 relay) or 1 (FAN NO. 2 relay) - Body ground Always 10 kΩ or higher
      2 (FAN NO. 1 relay) or 2 (FAN NO. 2 relay) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM 

    Refer to REMOVAL [12/2022 - 03/2023] , or refer to REMOVAL [03/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (FAN NO. 1 RELAY AND FAN NO. 2 RELAY - ECM) 

  12. INSPECT COOLING FAN RELAY (FAN NO. 1, FAN NO. 2 AND FAN NO. 3) 
    1. Inspect the FAN NO. 1 relay, FAN NO. 2 relay and FAN NO. 3 relay.

      Refer to ON-VEHICLE INSPECTION [12/2022 - ]

      Result

      Result Proceed to
      OK A
      NG (FAN NO. 1 relay) B
      NG (FAN NO. 2 relay) C
      NG (FAN NO. 3 relay) D

    Result: 

    B 

    REPLACE FAN NO. 1 RELAY 

    Result: 

    C 

    REPLACE FAN NO. 2 RELAY 

    Result: 

    D 

    REPLACE FAN NO. 3 RELAY 

    Result: 

    A 

    See step  13

  13. CHECK HARNESS AND CONNECTOR (FAN NO. 1 RELAY, FAN NO. 2 RELAY AND FAN NO. 3 RELAY POWER SOURCE CIRCUIT) 
    1. Remove the FAN NO. 1 relay and FAN NO. 2 relay and FAN NO. 3 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      1 (FAN NO. 1 relay) - Body ground Always 11 to 14 V
      1 (FAN NO. 2 relay) - Body ground Always 11 to 14 V
      1 (FAN NO. 3 relay) - Body ground Always 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (FAN NO. 1 RELAY, FAN NO. 2 RELAY AND FAN NO. 3 RELAY - ECM) 

    Result: 

    NG 

    See step  14

  14. CHECK HARNESS AND CONNECTOR (FAN NO. 1 RELAY, FAN NO. 2 RELAY AND FAN NO. 3 RELAY - EFI-MAIN NO. 1 RELAY) 
    1. Remove the EFI-MAIN No. 1 relay, FAN NO. 1 relay, FAN NO. 2 relay and FAN NO. 3 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      1 (FAN NO. 1 relay) - 5 (EFI-MAIN No. 1 relay) Always Below 1 Ω
      2 (FAN NO. 2 relay) - 5 (EFI-MAIN No. 1 relay) Always Below 1 Ω
      1 (FAN NO. 3 relay) - 5 (EFI-MAIN No. 1 relay) Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      1 (FAN NO. 1 relay) or 5 (EFI-MAIN No. 1 relay) - Body ground Always 10 kΩ or higher
      2 (FAN NO. 2 relay) or 5 (EFI-MAIN No. 1 relay) - Body ground Always 10 kΩ or higher
      1 (FAN NO. 3 relay) or 5 (EFI-MAIN No. 1 relay) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (FAN NO. 1 RELAY, FAN NO. 2 RELAY AND FAN NO. 3 RELAY - EFI-MAIN NO. 1 RELAY) 

    Result: 

    OK 

    See step  15

  15. INSPECT EFI-MAIN NO. 1 RELAY 
    1. Inspect the EFI-MAIN No. 1 relay.

      Refer to ON-VEHICLE INSPECTION [12/2022 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE EFI-MAIN NO. 1 RELAY 

    Result: 

    OK 

    See step  16

  16. CHECK HARNESS AND CONNECTOR (EFI-MAIN NO. 1 RELAY POWER SOURCE CIRCUIT) 
    1. Remove the EFI-MAIN No. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      3 (EFI-MAIN No. 1 relay) - Body ground Always 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI-MAIN NO. 1 RELAY POWER SOURCE CIRCUIT) 

    Result: 

    OK 

    See step  17

  17. CHECK HARNESS AND CONNECTOR (EFI-MAIN NO. 1 RELAY - BODY GROUND) 
    1. Remove the EFI-MAIN No. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      1 (EFI-MAIN No. 1 relay) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI-MAIN NO. 1 RELAY - BODY GROUND) 

    Result: 

    OK 

    See step  18

  18. CHECK HARNESS AND CONNECTOR (ECM - EFI-MAIN NO. 1 RELAY) 
    1. Disconnect the A92 ECM connector.
    2. Remove the EFI-MAIN No. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      A92-15 (MREL) - 2 (EFI-MAIN No. 1 relay) Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      A92-15 (MREL) or 2 (EFI-MAIN No. 1 relay) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM 

    Refer to REMOVAL [12/2022 - 03/2023] , or refer to REMOVAL [03/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - EFI-MAIN NO. 1 RELAY) 

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