2010 Cadillac Truck SRX AWD V6-3.0L Page 1776

2010 Cadillac Truck SRX AWD V6-3.0L Page 1776

Cover Replacement).

7. Connect the TCM harness connector.

8. Disconnect the IMS connector at the control solenoid valve assembly.

9. Ignition ON, verify the scan tool IMS A/B/C/P parameter displays HI for all four signal circuits.

瀚慖f not the specified value, 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).

10. Verify the scan tool ECM PNP Switch parameter displays In Gear.

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

11. Connect a 3-amp fused jumper wire between each transmission range signal circuit terminal listed below and the IMS ground circuit,

terminal A. Verify the corresponding scan tool IMS A/B/C/P parameter displays LOW when terminals E, D, C, and B are connected to the

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)

P0852

DTC P0850-P0852

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 Descriptors

DTC P0850

- Park/Neutral Position (PNP) Switch Circuit

DTC P0851

- Park/Neutral Position (PNP) Switch Circuit Low Voltage