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Home >> Jaguar >> 2014 >> XK Base, 2D Convertible >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling - V8 5.0L Petrol/V8 S/C 5.0L Petrol -- XK/X150 >> Engine Cooling - V8 N/A 5.0L Petrol/V8 S/C 5.0L Petrol >> Diagnosis And Testing >> Principles Of Operation >> Pinpoint Tests >> Pinpoint Test A: Cooling Fan Tests

Pinpoint Test A: Cooling Fan Tests

  1. A1: CHECK FOR COOLING FAN RELATED DTCS 
    1. Using the manufacturer approved diagnostic system, check the powertrain control module for the following cooling fan related DTCs (with any third byte):
      • P0480 Fan 1 Control Circuit
      • P0481 Fan 2 Control Circuit
      • P0483 Fan Rationality Check

    Are any cooling fan related DTCs set in the powertrain control module?

    • Yes  : Refer to the powertrain control module DTC index and perform the relevant corrective action. GO to  A9.
    • No: GO to  A2.
  2. A2: CHECK FOR OTHER DTCS 
    1. Using the manufacturer approved diagnostic system check the powertrain control module for DTCs

    Are any other DTCs set in the powertrain control module?

    • Yes  : Refer to the powertrain control module DTC index and perform the relevant corrective action
    • No  : GO to  A3.
  3. A3: COOLING FAN IS OPERATING PERMANENTLY 
    1. Check the operation of the cooling fan

    Is the cooling fan operating permanently at maximum speed?

    • Yes  : GO to  A5.
    • No  : GO to  A4.
  4. A4: COOLING FAN IS NOT OPERATING 
    1. Check the operation of the cooling fan

    Is the cooling fan inoperative?

    • Yes: GO to  A6.
    • No  : No fault found. Verify customer concern of cooling fan operation
  5. A5: COOLING FAN IS OPERATING PERMANENTLY 
    1. Using the manufacturer approved diagnostic system, check datalogger signal - Electric Fan PWM Control Commanded (0x03F9)

    Is the datalogger signal value between 5% and 16% while the cooling fan is operating?

    • Yes: GO to  A8.
    • No: GO to  A6.
  6. A6: COOLING FAN IS NOT OPERATING 
    1. Using the manufacturer approved diagnostic system, set datalogger signal - Electric Fan PWM Control Commanded (0x03F9) - to 30% (using output state control)

    Does the cooling fan operate?

    • Yes: GO to  A7.
    • No: GO to  A8.
  7. A7: ELECTRIC FAN PWM CONTROL 
    1. Using the manufacturer approved diagnostic system, set datalogger signal - Electric Fan PWM Control Commanded (0x03F9) - to 90% (using output state control)

    Did the cooling fan speed increase?

    • Yes  : No fault found. Verify customer concern of cooling fan operation.

      GO to  A9.

    • No: GO to  A8.
  8. A8: WIRING CHECK 
    1. Refer to the appropriate system wiring diagrams and check the cooling fan motor control module circuits for short circuit to ground, short circuit to power, open circuit, high resistance

    Were any circuit faults present?

    • Yes  : Repair the wiring harness as necessary. GO to  A9.
    • No: GO to  A9.
  9. A9: COOLING FAN VALIDATION PROCEDURE 
    1. Ensure that the hood is closed
    2. Start the engine
    3. Set the air conditioning to on, set the temperature to cold and the fan speed to fast
    4. Allow the engine to reach normal operating temperature (approximately 90°C)
    5. Using the manufacturer approved diagnostic system, check datalogger signals - Engine Coolant Temperature (0xF405) - and - Electric Fan PWM Control Commanded (0x03F9). As the engine coolant temperature reaches normal operating temperature, the fan speed should increase between the values of 9% and 90%

    Did the cooling fan speed increase speed as engine coolant temperature increased?

    • Yes  : Return vehicle to customer
    • No  : Contact Dealer Technical Support
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