2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2680

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2680

Repair Instructions

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

* Control Solenoid Valve and Transmission Control Module Assembly Replacement (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Extension Housing/Service and Repair/Control Solenoid Valve and Transmission Control Module Assembly

Replacement).

* Hybrid Low, 1-2 Clutch Piston Removal (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Service and

Repair/Overhaul/2ML70 - Automatic Transmission/24. Hybrid Low, 1-2 Clutch Piston Removal) and Hybrid Low, 1-2 Clutch Piston

Installation (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Service and Repair/Overhaul/2ML70 - Automatic

Transmission/31. Hybrid Low, 1-2 Clutch Piston Installation) for low and hybrid low, 1-2 clutch assembly repair or replacement.

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

setup, and programming.

2ML70 - Automatic Transmission

DTC P0815, P0816, or P0826

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 P0815

- Upshift Switch Circuit

DTC P0816

- Downshift Switch Circuit

DTC P0826

- Up and Down Shift Switch Circuit

Diagnostic Fault Information

Circuit/System Description

The driver shift control, also known as the TAP Shift, allows the driver to manually shift transmission modes and gears by pressing the Plus/Minus

button to select the desired range of gears for your current driving conditions by using the driver shift control shift switch located on the automatic

transmission gear shift lever. Pushing the Plus switch will command an upshift and pushing the Minus switch will command a downshift. 12 volt

reference voltage flows from the ignition body control module through the driver shift control switch resistor array to the body control module. The

driver shift control shift system is activated when the gear selector is in the Manual (M) position. The driver shift control system is deactivated in

all other range positions.

Conditions for Running the DTC

* The engine speed is 500-6,500 RPM for at least 5 seconds.

* No DTC P0826.

* The vehicle speed is less than 200 km/h (124 mph) for 5 seconds.

* The transmission fluid temperature is -59 to +159掳C (-74 to +318掳F).

* The system voltage is 11-18 V.

Conditions for Setting the DTC

P0815

The body control module detects an upshift request for 3 seconds when the transmission range selector is in D or 600 seconds in P, R, or N.