Sunday, February 2, 2020

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1544

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1544



DTC P0480



- Cooling Fan Speed Output Circuit



DTC P0691



- Cooling Fan Speed Output Circuit Low Voltage



DTC P0692



- Cooling Fan Speed Output Circuit High Voltage



Diagnostic Fault Information



Circuit/System Description



The engine control module (ECM) commands the cooling fan depending on cooling requirements. The ECM controls the cooling fan speed by



commanding the cooling fan control module. The cooling fan control module supplies the power and ground circuits for the cooling fan. The ECM



sends a pulse width modulated (PWM) signal to the cooling fan control module. The cooling fan control module interprets the signal and operates



the cooling fan at the commanded speed.



Conditions for Running the DTC



* The engine speed is greater than 0 RPM.



* The ignition voltage is between 10-18 volts.



* The DTCs run continuously once the above conditions are met.



Conditions for Setting the DTC



The ECM detects that the commanded state of the driver and the actual state of the control circuit do not match for greater than 1 second.



Action Taken When the DTC Sets



DTCs P0480, P0691, and P0692 are Type B DTCs.



Conditions for Clearing the MIL/DTC



DTCs P0480, P0691, and P0692 are Type B DTCs.



Diagnostic Aids



The ECM has the capability of providing command to the fan module even when a scan tool output control is being used. Always refer to the fan



control command parameters on the scan tool to know when the fan is being commanded ON by the ECM.



Reference Information



Schematic Reference



Engine Cooling Schematics (See: Engine, Cooling and Exhaust/Cooling System/Diagrams)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)



Description and Operation



Cooling Fan Description and Operation (LAU) (See: Engine, Cooling and Exhaust/Cooling System/Description and Operation/Cooling Fan



Description and Operation)Cooling Fan Description and Operation (LF1) (See: Engine, Cooling and Exhaust/Cooling System/Description and



Operation/Cooling Fan Description and Operation)



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

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