2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1675

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1675

IMS ground and the ECM PNP Switch parameter displays Park/Neutral when terminal F is connected to ground.

* Switch Signal A terminal E

* Switch Signal B terminal D

* Switch Signal C terminal C

* Switch Signal P terminal B

* PNP Switch Signal terminal F

瀚慖f not the specified value, replace the control solenoid valve assembly.

12. If all circuits test normal, replace the IMS.

Repair Instructions

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.

* 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).

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

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

replacement, setup, and programming

* Range Selector Lever Cable Adjustment (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Shift Linkage/Shift

Cable/Adjustments)

* Control Valve Body Cover Replacement (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and

Repair/6T70/6T75 - Automatic Transmission/Control Valve Body Cover Replacement)

* Manual Shift Detent Lever with Shaft Position Switch Assembly Replacement (See: Powertrain Management/Computers and Control

Systems/Sensors and Switches - Computers and Control Systems/Transmission Position Sensor/Switch/Service and Repair)

Antilock Brake System

DTC P0856

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 P0856 00

- Traction Control Torque Request Circuit Malfunction

Circuit/System Description

When traction control is active, the electronic brake control module (EBCM) sends a serial data message to the engine control module (ECM)

requesting torque reduction. When certain ECM DTCs are set, the ECM will not be able to perform the torque reduction for traction control. A

serial data message is sent to the EBCM indicating that traction control is not allowed.

Conditions for Running the DTC

Engine running

Conditions for Setting the DTC

The ECM detects a fault that prevents it from performing a traction control function and sends a serial data message to the EBCM indicating that

torque reduction is not allowed.

Action Taken When the DTC Sets

* The EBCM disables the traction control and stability control for the duration of the ignition cycle.