2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1752

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1752

change. As a fail-safe function, if any shift solenoid abnormality occurs, the transmission control module (TCM) will disable the current to the

solenoids.

Conditions for Running the DTC

P0985

* The ignition voltage is 10.2-15.5 V.

* The engine speed is greater than 400 RPM for 2 s.

* The transmission is not in emergency mode.

* 10 ms after solenoid output changed.

P0986

* The ignition voltage is 10.2-15.5 V.

* The engine speed is greater than 400 RPM for 2 s.

* The transmission is not in emergency mode.

* 10 ms after solenoid output changed.

Conditions for Setting the DTC

P0985

The TCM detects an ON signal (12 V) of the shift solenoid valve 1 circuit when the shift solenoid valve 1 is commanded OFF (0 V) for 100 ms

continuously after 5 times.

P0986

The TCM detects an OFF signal (0 V) of the shift solenoid valve 1 circuit when the shift solenoid valve 1 is commanded ON (12 V) for 100 ms

continuously after 5 times.

Action Taken When the DTC Sets

* DTCs P0985 and P0986 are Type A DTCs.

* The TCM freezes transmission adaptive functions.

* 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

* DTCs P0985 and P0986 are Type A DTCs.

* The TCM detects an ON signal (12 V) of the shift solenoid valve 1 circuit when the shift solenoid valve 1 is commanded ON (12 V) for 1 s

continuously.

* The TCM detects an OFF signal (0 V) of the 1 circuit when the shift solenoid valve 1 is commanded OFF (0 V) for 1 s continuously.

Diagnostic Aids

When attempting to set solenoid electrical DTCs, ensure the control solenoid valve assembly is warmed up and the transmission is operated long

enough to ensure a 3掳C (5掳F) increase in temperature. This will place the TCM in 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