2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2771

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2771

Instructions) provides an overview of each diagnostic category.

DTC Descriptor

DTC P0976

- Shift Solenoid (SS) 2 Control Circuit Low Voltage

DTC P0977

- Shift Solenoid (SS) 2 Control Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

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