2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2760

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2760

Circuit/System Description

The shift solenoid (SS) 1 is part of the control solenoid valve assembly which has no serviceable parts. SS 1 is a normally closed (NC) ON/OFF

solenoid and is controlled by the TCM through a low side driver. When the SS 1 is energized (ON), SS 1 fluid pressure is directed to the clutch

select valve 2. Power to the SS 1 is supplied by the TCM through a high side driver (HSD). The HSD protects the circuit and components from

excessive current flow. If excessive current flow is detected, the HSD will turn OFF. When the fault is corrected, the HSD will reset.

Conditions for Running the DTC

P0973 or P0974

* DTCs P0973 or P0974 have not set this ignition.

* The ignition voltage is 8.6 volts or greater.

* The engine speed is 500 RPM or greater for 5 seconds.

Conditions for Setting the DTC

P0973

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

OFF for 2 seconds.

P0974

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

ON for 2 seconds.

Action Taken When the DTC Sets

P0973

* DTC P0973 is a Type A DTC.

* The TCM defaults the transmission to 2nd gear or reverse gear.

* The TCM forces the torque converter clutch (TCC) OFF.

* The TCM commands maximum line pressure.

* The TCM freezes transmission adaptive functions.

* The TCM enables Torque Management.

* The TCM inhibits TAP function.

* The TCM inhibits manual shifting of forward gears.

P0974

* DTC P0974 is a Type B DTC.

* The TCM inhibits 1st gear.

Conditions for Clearing the DIC/DTC

* DTC P0973 is a Type A DTC.

* DTC P0974 is a Type B DTC.

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)

* Inline Harness Connector End Views (See: Power and Ground Distribution/Multiple Junction Connector/Diagrams)

Description and Operation