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
