2010 Cadillac CTS Sedan AWD V6-3.0L Page 1995
P2720
* DTC P2720 is a Type A DTC.
* The TCM defaults the transmission to a limited shift pattern utilizing 2nd gear and reverse gear.
* The TCM forces TCC OFF.
* The TCM freezes transmission adaptive functions.
* The TCM commands maximum line pressure.
* The TCM enables Torque management.
* The TCM inhibits TAP Up/Down function.
* The TCM inhibits manual shifting of forward gears.
P2721
* DTC P2721 is a Type A DTC.
* The TCM defaults the transmission to a limited shift pattern utilizing 3rd gear and reverse gear.
* The TCM forces TCC OFF.
* The TCM freezes transmission adaptive functions.
* The TCM commands maximum line pressure.
* The TCM enables Torque management.
* The TCM inhibits TAP Up/Down function.
* The TCM inhibits manual shifting of forward gears.
Conditions for Clearing the DTC
* DTC P2719 is a Type C DTC.
* DTCs P2720 and P2721 are Type A DTCs.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams)
Connector End View Reference
* Component Connector End Views (See: Diagrams/Connector Views)
* Inline Harness Connector End Views (See: Power and Ground Distribution/Multiple Junction Connector/Diagrams)
Description and Operation
* Transmission General Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and
Operation/Transmission General Description)
* Transmission Component and System Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and
Operation/Transmission Component and System Description)
* Electronic Component Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and
Operation/Electronic Component Description)
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
Special Tools
DT-47825-10 - Jumper Harness
Circuit/System Verification
1. Operate the vehicle in second gear long enough to ensure at least a 3掳C (5掳F) rise in TCM temperature, then operate the vehicle in Park for 5
seconds.
2. Operate the vehicle in drive range. Allow the transmission to shift through all forward gear ranges. Verify with a scan tool the following test
status parameters display OK:
