2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2755

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2755

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

Control Module References (See: Testing and Inspection/Programming and Relearning) for control solenoid valve assembly replacement, setup,

and programming.

6L50/6L80/6L90 - Automatic Transmission

DTC P0973 or P0974

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0973

- Shift Solenoid (SS) 1 Control Circuit Low Voltage

DTC P0974

- Shift Solenoid (SS) 1 Control Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

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