2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1233

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1233

瀚慖f both MTS values were not at or near 200掳C (392掳F), test the MTS signal circuit for a low resistance to ground condition.

瀚慖f the circuit tests normal, replace the motor temperature sensor.

3. Inspect the transmission cooling system for restrictions or damage.

瀚慖f a concern is found, repair or replace the restricted or damaged components as necessary.

4. Perform the Transmission Fluid Cooler Flushing and Flow Test (J 45096) (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Testing and Inspection/Symptom Related Diagnostic Procedures/2ML70 - Automatic Transmission/Transmission

Fluid Cooler Flushing and Flow Test (J 45096)).

瀚慖f a concern is found, repair or replace the damaged components as necessary.

5. Perform the automatic transmission Line Pressure Check (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and

Inspection/Component Tests and General Diagnostics/2ML70 - Automatic Transmission/Line Pressure Check).

瀚慖f a concern is found repair or replace the damaged components as necessary.

Component Testing

* Perform the Fluid Leak Diagnosis (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component

Tests and General Diagnostics/2ML70 - Automatic Transmission/Fluid Leak Diagnosis).

* Perform the Transmission Fluid Level and Condition Check (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing

and Inspection/Symptom Related Diagnostic Procedures/2ML70 - Automatic Transmission/Transmission Fluid Level and Condition Check)

procedure.

* Perform the Line Pressure Check (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component

Tests and General Diagnostics/2ML70 - Automatic Transmission/Line Pressure Check) procedure.

Repair Instructions

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

* Drive Motor with Generator Assembly Removal - 2nd Position (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Service and Repair/Overhaul/2ML70 - Automatic Transmission/13. Drive Motor with Generator Assembly Removal

- 2nd Position).

* Transmission Control Wiring Harness Extension Harness Removal (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Service and Repair/Overhaul/2ML70 - Automatic Transmission/5. Transmission Control Wiring Harness Extension

Harness Removal).

P0A40

DTC P0A40

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 Descriptor

DTC P0A40

- Drive Motor 1 Position Sensor Performance

Diagnostic Fault Information