2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1738

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1738

8. Inspect the hybrid direct, 2-3-4 clutch for a slipping or damaged condition.

瀚慖f you found a hybrid direct, 2-3-4 clutch concern, repair or replace the hybrid direct, 2-3-4 clutch assembly as necessary.

Repair Instructions

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

* Control Valve Assembly Disassemble (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Service and

Repair/Overhaul/2ML70 - Automatic Transmission/54. Control Valve Assembly Disassemble) for valve body inspection procedures.

* Control Valve Upper Body Replacement (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and

Repair/2ML70 - Automatic Transmission) for control valve body replacement.

* Hybrid Direct, 2-3-4 Clutch Housing Overhaul (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Service and

Repair/Overhaul/2ML70 - Automatic Transmission/29. Hybrid Direct, 2-3-4 Clutch Housing Overhaul) for hybrid direct, 2-3-4 clutch

replacement.

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

setup, and programming.

P079C

DTC P079C

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 P079C

- Transmission Clutch 3 Slip Detected

Circuit/System Description

The transmission control module monitors the 4th clutch slip Speed when the 4th clutch is applied. The 4th clutch is displayed as Clutch 3 on the

scan tool. The transmission control module is part of the control solenoid valve assembly and is not serviced separately.

Conditions for Running the DTC

The clutch PC solenoid 3 commanded pressure is 1800 kPa (261 psi) for 3 seconds.

Conditions for Setting the DTC

The transmission control module detects the 4th clutch slip speed is greater than 100 RPM for greater than 3 seconds.

Action Taken When the DTC Sets

* P079C is a Type B DTC.

* The transmission control module inhibits gear 4.

Conditions for Clearing the DTC

P079C is a Type B DTC.

Diagnostic Aids

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure

conditions. Ensure the transmission fluid level is correct and there are no leaks. If there are any other transmission DTCs set, diagnose those first.

Reference Information

DTC Type Reference

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

(DTC) Type Definitions)