2010 Cadillac Truck SRX FWD V6-3.0L Page 2118

2010 Cadillac Truck SRX FWD V6-3.0L Page 2118

* DTCs P2729 and P2730 are Type B DTCs.

* No self learning function.

* The TCM turns OFF all solenoids.

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

Conditions for Clearing the DTC

P2725, P2728

* DTC P2725 and P2728 are Type B DTC.

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

P2729, P2730

* DTCs P2729 and P2730 are Type B DTCs.

* The current consumption of the SLB1 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 in the optimal condition 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)

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 Brake Band Pressure Control Solenoid Valve Current parameter. The reading should be between 0.1-1.1 A.

Circuit/System Testing

Command the Shift Brake Pressure Control Solenoid Valve with a scan tool. The value should change from 0.0-1.0 A.

If the value does not change, turn ignition OFF, remove the K71 Transmission Control Module. Connect a test lamp between the low reference

circuit terminal 16 X2 at the K71 Transmission Control Module and the voltage supply component circuit terminal 21 X2 at the K71 Transmission

Control Module. Command the Shift Brake Pressure Control Solenoid Valve with a scan tool. The test lamp has to illuminate brighter with

increasing current.

If the test lamp always illuminates or always does not illuminate, replace the K71 Transmission Control Module.