Pinpoint Test C: Cooling Fan Tests
- C1: CHECK FOR COOLING FAN RELATED S
- Using the Jaguar Land Rover Approved Diagnostic Equipment, 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
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 C9.
No : GO to C2.
- Using the Jaguar Land Rover Approved Diagnostic Equipment, check the powertrain control module for the following cooling fan related DTCs (with any third byte):
- C2: CHECK FOR OTHER S
- Using the Jaguar Land Rover Approved Diagnostic Equipment 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 C3.
- Using the Jaguar Land Rover Approved Diagnostic Equipment check the powertrain control module for DTCs
- C3: COOLING FAN IS OPERATING PERMANENTLY
- Check the operation of the cooling fan
Is the cooling fan operating permanently at maximum speed?
Yes : GO to C5.
No : GO to C4.
- Check the operation of the cooling fan
- C4: COOLING FAN IS NOT OPERATING
- Check the operation of the cooling fan
Is the cooling fan inoperative?
Yes : GO to C6.
No : No fault found. Verify customer concern of cooling fan operation
- Check the operation of the cooling fan
- C5: COOLING FAN IS OPERATING PERMANENTLY WARNING: Moving parts can cause severe injury, keep clear of moving parts, never place your hands or any part of your body near to moving parts.
- Using the Jaguar Land Rover Approved Diagnostic Equipment, check datalogger signal - Electric Fan Pulse Width Modulated (PWM) Control Commanded (0x03F9)
Is the datalogger signal value between 5% and 16% when the cooling fan is operating?
Yes : GO to C8.
No : GO to C6.
- Using the Jaguar Land Rover Approved Diagnostic Equipment, check datalogger signal - Electric Fan Pulse Width Modulated (PWM) Control Commanded (0x03F9)
- C6: COOLING FAN IS NOT OPERATING CAUTION: Make sure the hood is closed and there are not any loose objects in front of the vehicle.
- Using the Jaguar Land Rover Approved Diagnostic Equipment, set datalogger signal - Electric Fan PWM Control Commanded (0x03F9) - to 30% (using output state control)
Does the cooling fan operate?
Yes : GO to C7.
No : GO to C8.
- Using the Jaguar Land Rover Approved Diagnostic Equipment, set datalogger signal - Electric Fan PWM Control Commanded (0x03F9) - to 30% (using output state control)
- C7: ELECTRIC FAN CONTROL
- Using the Jaguar Land Rover Approved Diagnostic Equipment, 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 C9.
No : GO to C8.
- Using the Jaguar Land Rover Approved Diagnostic Equipment, set datalogger signal - Electric Fan. PWM Control Commanded (0x03F9) - to 90% (using output state control)
- C8: WIRING CHECK
- Refer to the electrical circuit 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 C9.
No : GO to C9.
- Refer to the electrical circuit diagrams and check the cooling fan motor control module circuits for short circuit to ground, short circuit to power, open circuit, high resistance
- C9: COOLING FAN VALIDATION PROCEDURE
- Make sure that the hood is closed
- Start the engine
- Set the air conditioning to on, set the temperature to cold and the fan speed to fast
- Allow the engine to reach normal operating temperature (approximately 90°C)
- Using the Jaguar Land Rover Approved Diagnostic Equipment, 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 Retailer Technical Support