2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1386

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1386

4. If all circuits test normal, replace the appropriate fuel level sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Primary Fuel Level Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Fuel Level Sensor/Service and

Repair)

* Secondary Fuel Tank Module Replacement (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Tank Unit/Service and

Repair/Secondary Fuel Tank Module Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for the ECM replacement, programming and setup

P0480

DTC P0480, P0691, or P0692 (without/LF1)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

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