2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2767

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2767

The shift solenoid 2 is part of the control solenoid valve assembly and is not serviced separately. The control solenoid valve assembly supplies 12

volts to shift solenoid 2 on the high side driver 1 circuit. The control solenoid valve assembly controls the normally closed shift solenoid 2 on the

shift solenoid 2 control circuit. The shift solenoid 2 controls the transmission fluid to the 1-3 clutch regulator valve assembly.

In the OFF position, shift solenoid 2 controls the transmission fluid to the following components:

* EVT 1 mode, oil is supplied to drive motors with generator 1 and 2 for cooling and the hybrid low, 1-2 clutch

* Gear 1, oil is supplied to the hybrid low, 1-2 clutch and the 1-3 clutch

* Gear 2, oil is supplied to the hybrid low, 1-2 clutch and the hybrid direct 2-3-4 clutch

In the ON position, shift solenoid 2 controls the transmission fluid to the following components:

* EVT 2 mode, oil is supplied to drive motors with generator 1 and 2 for cooling and the hybrid direct 2-3-4 clutch

* Gear 3, oil is supplied to the hybrid direct 2-3-4 clutch and the 1-3 clutch

* Gear 4, oil is supplied to the hybrid direct 2-3-4 clutch and the 4th clutch

Conditions for Running the DTC

* The engine run time is greater than 5 seconds.

* The vehicle speed is less than 200 km/h (124 mph) for 5 seconds.

* The system voltage is 11-18 V.

Conditions for Setting the DTC

P0976

The transmission control module detects an internal low voltage electrical malfunction of the shift solenoid 2 control circuit when the shift solenoid

2 is commanded OFF for 1 second.

P0977

The transmission control module detects an internal high voltage electrical malfunction of the shift solenoid 2 control circuit when the shift

solenoid 2 is commanded ON for 1 second.

Action Taken When the DTC Sets

* DTCs P0976 and P0977 are Type A DTCs.

* The transmission control module defaults the transmission to EVT 1 or EVT 2 depending on vehicle speed.

* The transmission control module commands maximum line pressure.

* The transmission control module freezes transmission adaptive functions.

Conditions for Clearing the DTC

DTCs P0976 and P0977 are Type A DTCs.

Diagnostic Aids

When attempting to set solenoid electrical DTCs, ensure the transmission control module is warmed up and the transmission is operated in 4th gear

long enough to ensure a 3掳C (5掳F) increase in TCM temperature parameter. This will place the transmission control module under the optimal

conditions to test solenoid electrical DTCs.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

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)