Sunday, December 22, 2019

2010 Cadillac Truck Escalade AWD V8-6.2L Page 2498

Typical Scan Tool Data

Circuit/System Description

The shift solenoid 1 is part of the control solenoid valve assembly and is not serviced separately. The control solenoid valve assembly supplies 12

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

shift solenoid 1 control circuit. The shift solenoid 1 controls the transmission fluid to the hybrid low, 1-2 clutch boost valve assembly.

In the OFF position, shift solenoid 1 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

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

In the ON position, shift solenoid 1 controls the transmission fluid to the following components:

* 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

* 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

P0973

The control solenoid valve assembly detects an internal low voltage electrical malfunction of the shift solenoid 1 control circuit when shift solenoid

1 is commanded OFF for 1 second.

P0974

The control solenoid valve assembly detects an internal high voltage electrical malfunction of the shift solenoid 1 control circuit when shift

solenoid 1 is commanded ON for 1 second.

Action Taken When the DTC Sets

* DTCs P0973 and P0974 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 P0973 and P0974 are Type A DTCs.

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锟斤拷C (5锟斤拷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

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