2010 Cadillac CTS Sedan AWD V6-3.0L Page 1604

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