2010 Cadillac CTS Sedan AWD V6-3.0L Page 1605
The 5 V reference circuit voltage is greater or less than a predetermined threshold.
Action Taken When the DTC Sets
DTCs P0641, P0642, P0643, P0651, P0652, P0653, P0697, P0698, and P0699 are Type A DTCs.
Conditions for Clearing the DTC
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
