2010 Cadillac CTS Sedan AWD V6-3.0L Page 1604

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2010 Cadillac CTS Sedan AWD V6-3.0L Page 1604



* Accelerator Pedal Position Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position



Sensor/Service and Repair)



* Throttle Body Assembly Replacement (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Throttle Body/Service and



Repair/Removal and Replacement)Throttle Body Assembly Replacement (LLT) (See: Powertrain Management/Fuel Delivery and Air



Induction/Throttle Body/Service and Repair/Removal and Replacement)



* Crankshaft Position Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Crankshaft Position



Sensor/Service and Repair)



* Air Conditioning (A/C) Refrigerant Pressure Sensor Replacement (See: Heating and Air Conditioning/Refrigerant Pressure Sensor /



Switch/Service and Repair)



* Clutch Pedal Position Switch Replacement (See: Powertrain Management/Transmission Control Systems/Sensors and Switches -



Transmission and Drivetrain/Sensors and Switches - M/T/Clutch Pedal Position Sensor / Switch/Service and Repair)



* Manifold Absolute Pressure Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Manifold



Pressure/Vacuum Sensor/Service and Repair)



* Control Module References (See: Testing and Inspection/Programming and Relearning)for engine control module replacement, setup, and



programming



P0698



DTC P0641-P0643, P0651-P0653, or P0697-P0699 (ECM, LLT)



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 P0641



- 5 V Reference 1 Circuit



DTC P0642



- 5 V Reference 1 Circuit Low Voltage



DTC P0643



- 5 V Reference 1 Circuit High Voltage



DTC P0651



- 5 V Reference 2 Circuit



DTC P0652



- 5 V Reference 2 Circuit Low Voltage



DTC P0653



- 5 V Reference 2 Circuit High Voltage



DTC P0697



- 5 V Reference 3 Circuit



DTC P0698



- 5 V Reference 3 Circuit Low Voltage



DTC P0699



- 5 V Reference 3 Circuit High Voltage



Circuit/System Description



The engine control module (ECM) has 3 5 V reference circuits. The ECM provides the 5 V reference to various sensors. Each reference circuit



provides a 5 V reference for more than one sensor. An open, short to ground, or short voltage on one of the 5 V reference circuits can affect all the



components connected to that 5 V reference circuit. The ECM monitors the voltage on the 5 V reference circuits.



Conditions for Running the DTC



* The ignition is ON for more than 3 s.



* DTCs P0641, P0642, P0643, P0651, P0652, P0653, P0697, P0698, and P0699 run continuously when the above condition is met.



Conditions for Setting the DTC

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