2010 Cadillac CTS Sedan AWD V6-3.0L Page 1463
* DTC P0120, P0220 or P0503 are not set.
* The TP sensor angle is more than 3.5 percent.
* The engine is running.
* The system voltage is 8-18V.
* TFT is more than -40掳C (-40掳F)
* The engine speed is 1,500-6,500 RPM.
* Vehicle speed is less than 200 km/h (124 mph).
* Engine torque is 68-8192 Nm (50-6,042 lb ft).
P0503
* The system voltage is 8-18V.
* The engine speed is 500-7,500 RPM.
* Transmission out speed change is less than 146 RPM for 2 seconds.
Conditions for Setting the DTC
P0502
The transmission output speed is 58 RPM or less for 5 seconds.
P0503
The transmission output speed drops 351 RPMs in less than 3 seconds.
Action Taken When the DTC Sets
P0502 and P0503 are Type B DTCs.
Conditions for Clearing the DTC
P0502 and P0503 are Type B DTCs.
Reference Information
Schematic Reference
Manual Transmission Schematics (See: Transmission and Drivetrain/Manual Transmission/Transaxle/Diagrams/Electrical Diagrams/Tremec
6-Speed - Manual Transmission)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Manual Transmission Description and Operation (See: Transmission and Drivetrain/Manual Transmission/Transaxle/Description and
Operation/Tremec 6-Speed - Manual Transmission/Manual Transmission Description and Operation)
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)
Special Tools
J 35616 - GM-Approved Terminal Test Kit
For equivalent regional tools, refer to Special Tools (See: Transmission and Drivetrain/Manual Transmission/Transaxle/Tools and
Equipment/Tremec 6-Speed - Manual Transmission).
Circuit/System Verification
1. Raise and support the drive wheels.
