2010 Cadillac Truck Escalade AWD V8-6.2L Page 2644

The TCM is communicating on the GMLAN serial data bus.

Conditions for Setting the DTC

The TCM detects less than 2 volts on the IGN voltage circuit at the TCM for greater than 10 seconds.

Action Taken When the DTC Sets

* P2534 is a Type A DTC.

* The TCM turns OFF all solenoids.

* The TCM commands maximum line pressure.

* The TCM freezes transmission adaptive functions.

Conditions for Clearing the DTC

P2534 is a Type A DTC.

Diagnostic Aids

* Ensure the transmission pass through connector and harness terminals are clean and not damaged, and the charging system is functioning

correctly.

* The transmission 24-way inline harness connector must be disconnected prior to disconnecting the transmission 16-way inline harness

connector

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)

DTC Type Reference

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

(DTC) Type Definitions)

Circuit/System Testing

1. Ignition OFF, disconnect the transmission 24-way inline harness connector, then the transmission 16-way in line harness connector at the

transmission, verify that a test lamp does not illuminate between the ignition voltage circuit terminal 12 and ground.

锟斤拷If the test lamp illuminates, test the IGN voltage circuit for a short to voltage.

2. Ignition ON, verify that a test lamp illuminates between the ignition voltage circuit terminal 12 and ground.

锟斤拷If the test lamp does not illuminate, test the ignition voltage circuit for a short to ground or an open/high resistance.

锟斤拷If the circuit tests normal replace the control solenoid (w/body and TCM) valve assembly.

Repair Instructions

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

Control Module References (See: Testing and Inspection/Programming and Relearning) for control solenoid (w/body and TCM) valve assembly

replacement, setup, and programming.