2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2895

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2895

The transmission control module (TCM) samples the system voltage on the Ignition 1 voltage circuit every 0.1 seconds. Lower than normal voltage

may be inadequate to operate the transmission control solenoids properly. Improper solenoid operation may cause erratic transmission operation,

which may result in internal damage.

Conditions for Running the DTC

* The engine speed is greater than 500 RPM.

* Ignition voltage is between 8.6-19.0 volts.

Conditions for Setting the DTC

The TCM detects 6 volts or less on the ignition 1 voltage circuit at the TCM for 1.0 second or more.

Action Taken When the DTC Sets

* DTC P2534 is a Type A DTC.

* The TCM turns OFF HSD1 and HSD2.

* The TCM turns OFF all solenoids.

* The TCM commands maximum line pressure.

* The TCM freezes transmission adaptive functions.

* The TCM commands the TCC OFF.

* The TCM allows the vehicle to operate in transmission protection mode.

* The TCM disables Tap up and Tap down functions.

Conditions for Clearing the DTC

DTC P2534 is a Type A DTC.

Diagnostic Aids

If all circuit tests are OK, ensure the transmission pass through connector and harness terminals are clean and not damaged, and the charging

system is functioning correctly.

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)

Description and Operation

* Transmission General Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission General Description)

* Transmission Component and System Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission Component and System Description)

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, accessories OFF, measure and record the battery voltage with a DMM. The battery voltage should be between 12.5-14.5 volts.