2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1617

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1617

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 or overhaul.

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

setup, and programming.

P07A7

DTC P07A7

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 P07A7

- Transmission Clutch 3 Stuck On

Circuit/System Description

The hybrid powertrain control module monitors the clutch slip speed for each Hybrid Trans. Mode Commanded state. This DTC detects no clutch

slip speed when the 4th clutch is commanded OFF, indicating a stuck or welded clutch condition. The 4th clutch is displayed as Clutch 3 on the

scan tool.

Conditions for Running the DTC

* 4th clutch is commanded off.

* The Calc. Trans Input Speed is greater than 250 RPM.

Conditions for Setting the DTC

The 4th clutch is commanded OFF and the hybrid powertrain control module detects the clutch 4 slip speed is less than 80 RPM for 3 seconds.

Action Taken When the DTC Sets

* P07A7 is a Type B DTC.

* The hybrid control module inhibits gear 4.

Conditions for Clearing the DTC

P07A7 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)

Scan Tool Reference

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

Circuit/System Verification

1. 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)

to verify correct fluid level.

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