2010 Cadillac CTS Sedan AWD V6-3.0L Page 1552

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1552

DTCs P0641, P0642, P0643, P0651, P0652, P0653, P0697, P0698, and P0699 are Type A DTCs.

Diagnostic Aids

DTC P0641, P0642, and P0643

The 5 V reference 1 circuit provides 5 V to the following sensors:

* B150 fuel tank pressure sensor

* B25B clutch pedal position sensor, if equipped

* B37B engine oil pressure sensor

* B1 A/C refrigerant pressure sensor

DTC P0651, P0652, and P0653

The 5 V reference 2 circuit provides 5 V to the following sensors:

* All four B23 camshaft position sensors

* B107 accelerator pedal position (APP) sensor 1

DTC P0697, P0698, and P0699

The 5 V reference 3 circuit provides 5 V to the following sensors:

* B106 throttle position sensor 1 and 2

* B26 crankshaft position sensor

* B107 accelerator pedal position (APP) sensor 2

* B47B fuel rail pressure sensor

瀚慖f the condition is intermittent, move the related harnesses and connectors with the engine operating. Monitor the scan tool 5 V Reference

Circuit Test Status parameters for the affected components. The circuit test status parameter will change from OK or Not Run to Fault if

there is a condition with the circuit or a connection.

Reference Information

Schematic Reference

Engine Controls Schematics (LLT) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics

(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)

Connector End View Reference

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

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)

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

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

Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning)for scan tool information

Circuit/System Verification

1. Ignition ON, observe the DTC information with a scan tool. DTC P0641, P0642, P0643, P0651, P0652, P0653, P0697, P0698, or P0699

should not set.

2. Observe the appropriate scan tool 5 V Reference Circuit Test Status parameter. The parameter should display OK or Not Run.

3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

Note: Additional DTCs will set when disconnecting the components.