Sunday, December 22, 2019

2010 Cadillac Truck Escalade AWD V8-6.2L Page 2503

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

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)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information.

Circuit/System Verification

1. Engine ON, verify the transmission fluid temperature is between 50-80锟斤拷C (122-176锟斤拷F).

2. Operate the vehicle with the transmission in M1 range long enough to verify at least a 3锟斤拷C (5锟斤拷F) rise in TCM temperature parameter, then

operate the vehicle in Park for 5 seconds.

3. Engine ON, observe the scan tool Shift Sol. 1 CKT Status parameter. The reading should display OK or Indeterminate.

锟斤拷If the reading is not within the specified range, replace the control solenoid valve assembly.

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

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