2010 Cadillac Truck SRX FWD V6-3.0L Page 2091

2010 Cadillac Truck SRX FWD V6-3.0L Page 2091

P2721

The TCM detects at least 5 times more than 1.333 A current consumption of the SLC3 control circuit for 100 ms.

Action Taken When the DTC Sets

P2716, P2719

* DTCs P2716 and P2719 are Type B DTCs.

* The TCM turns OFF all solenoids.

* The TCM allows the vehicle to operate only in the second gear and "R" range after a stop.

P2720, P2721

* DTCs P2720 and P2721 are Type B DTCs.

* No self learning function

* The TCM turns OFF all solenoids.

* The TCM allows the vehicle after a stop to operate only in the second gear and "R" range.

Conditions for Clearing the DTC

P2716, P2719

* DTCs P2716 and P2719 are Type B DTCs.

* The TCM detects the error current less than 50 mA for 2.75 ms.

P2720, P2721

* DTCs P2720 and P2721 are Type B DTCs.

* The current consumption of the SLC3 control circuit is 0.1-1.1 A for 500 ms.

Diagnostic Aids

When attempting to set solenoid electrical DTCs, ensure the TCM is warmed up and the transmission is operated in 2nd gear long enough to ensure

a 3掳C (5掳F) increase in TCM substrate temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams/Electrical

Diagrams)

Connector End View Reference

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

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

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

Procedures/Connector Repairs/Connector Repairs)

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

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Description and Operation

Transmission Component and System Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/AF40-6 - Automatic Transmission/Transmission Component and System Description)

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. Ensure the transmission fluid temperature is between 50-80掳C (122-176掳F).

2. Operate the vehicle in 2nd gear long enough to ensure at least a 3掳C (5掳F) rise in transmission fluid temperature, then operate the vehicle in

Park for 5 s.

3. Observe the scan tool Clutch Pressure Control Solenoid Valve 3 Current parameter. The reading should be between 0.1-1.1 A.

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2562

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2562

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/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission General Description)

* Transmission Component and System Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission Component and System Description)

* Electronic Component Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Electronic Component Description)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

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

Procedures/Connector Repairs/Connector Repairs)

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

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/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:

* Pressure Control Solenoid Valve 4 Performance Test Status

* Pressure Control Solenoid Valve 4 Control Circuit High Voltage Test Status

* Pressure Control Solenoid Valve 4 Control Circuit Low Voltage Test Status

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.

2010 Cadillac Truck Escalade RWD V8-6.2L Page 2562

2010 Cadillac Truck Escalade RWD V8-6.2L Page 2562

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/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission General Description)

* Transmission Component and System Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission Component and System Description)

* Electronic Component Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Electronic Component Description)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

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

Procedures/Connector Repairs/Connector Repairs)

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

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/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:

* Pressure Control Solenoid Valve 4 Performance Test Status

* Pressure Control Solenoid Valve 4 Control Circuit High Voltage Test Status

* Pressure Control Solenoid Valve 4 Control Circuit Low Voltage Test Status

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.

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2926

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2926

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/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission General Description)

* Transmission Component and System Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission Component and System Description)

* Electronic Component Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Electronic Component Description)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

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

Procedures/Connector Repairs/Connector Repairs)

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

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/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:

* Pressure Control Solenoid Valve 4 Performance Test Status

* Pressure Control Solenoid Valve 4 Control Circuit High Voltage Test Status

* Pressure Control Solenoid Valve 4 Control Circuit Low Voltage Test Status

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.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1954

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1954

P2721

The TCM detects an open or short to voltage on the clutch PC solenoid 4 control circuit for 1 second.

Action Taken When the DTC Sets

P2719

* DTC P2719 is a Type C DTC.

* The TCM freezes transmission adaptive functions on the 2-6 clutch.

P2720

* DTC P2720 is a Type A DTC.

* The TCM commands maximum line pressure.

* The TCM freezes transmission adaptive functions.

* The TCM inhibits manual shifting of forward gears.

* The TCM limits the transmission to 2nd gear.

P2721

* DTC P2721 is a Type A DTC.

* The TCM commands maximum line pressure.

* The TCM freezes transmission adaptive functions.

* The TCM inhibits Tap Up/Down function.

* The TCM inhibits manual shifting of forward gears.

* The TCM limits the transmission to reverse, 1st, and 3rd gear.

Conditions for Clearing the DTC

* DTC P2719 is a Type C DTC.

* DTCs P2720 and P2721 are Type A DTCs.

Reference Information

Connector End View Reference

* Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

* Inline Harness Connector End Views (See: Diagrams/Connector Views/Multiple Junction Connector/Connector End Views By Number)

Description and Operation

Transmission General Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and Operation/6T70/6T75 -

Automatic Transmission/Transmission General Description)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

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

Procedures/Connector Repairs/Connector Repairs)

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

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/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-47825-20 Adapter 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:

2010 Cadillac Truck Escalade AWD V8-6.2L Page 2677

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/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission General Description)

* Transmission Component and System Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission Component and System Description)

* Electronic Component Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Electronic Component Description)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

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

Procedures/Connector Repairs/Connector Repairs)

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

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/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锟斤拷C (5锟斤拷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:

* Pressure Control Solenoid Valve 4 Performance Test Status

* Pressure Control Solenoid Valve 4 Control Circuit High Voltage Test Status

* Pressure Control Solenoid Valve 4 Control Circuit Low Voltage Test Status

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.