2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1591

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1591

Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair/6T70/6T75 - Automatic Transmission/Control Valve Body

Cover Replacement).

2. Connect the TCM harness connector.

3. Disconnect the OSS harness connector X4 from the control solenoid valve assembly.

4. Ignition ON, test for 8.3-9.3 volts between the OSS voltage circuit terminal A on the control solenoid valve assembly and ground at the

transmission case.

瀚慖f not within the specified range, replace the control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control

Module Assembly Replacement (See: Powertrain Management/Transmission Control Systems/Actuators and Solenoids - Transmission

and Drivetrain/Actuators and Solenoids - A/T/Shift Solenoid/Service and Repair).

5. Perform the Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test (See:

Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component Tests and General

Diagnostics/6T70/6T75 - Automatic Transmission/Control Solenoid Valve and Transmission Control Module Assembly Input Shaft

Speed/Output Shaft Speed Input Test).

6. Inspect the front differential transfer drive gear teeth surface for damage or misalignment and for metallic debris on the face of the sensor.

Repair or replace as necessary.

7. If all circuits test normal, replace the output speed sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

Important: Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and

Inspection/Programming and Relearning) following all transmission related repairs.

* Output Speed Sensor Replacement (See: Powertrain Management/Transmission Control Systems/Sensors and Switches - Transmission and

Drivetrain/Sensors and Switches - A/T/Transmission Speed Sensor/Service and Repair/Output Speed Sensor Replacement)

Important: Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection

(See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component Tests and General

Diagnostics/6T70/6T75 - Automatic Transmission/Control Solenoid Valve and Transmission Control Module Assembly Inspection).

* Control Module References (See: Testing and Inspection/Programming and Relearning) for control solenoid valve assembly replacement,

setup, and programming

P0729

DTC P0729

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptor

DTC P0729

- 6th Gear Ratio Incorrect

Diagnostic Fault Information