2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2195

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2195

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)

Scan Tool Reference

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

Circuit/System Verification

Important: Because of normal system communications between the TDM and ECM, any theft deterrent B-codes must be diagnosed prior

to the diagnosis of P-codes.

DTC P0633 will clear upon a successful engine start. Any malfunction that will cause a no-start condition will prevent DTC P0633 from

clearing. Prior to diagnosing DTC P0633, ensure that all power moding and engine control systems are operating properly and all

conditions that may cause a no-start have been corrected.

1. Ignition in the CRANK position, verify the scan tool Ignition Run/Crank parameter is Active.

瀚慖f not the specified value, refer to Power Mode Mismatch (See: Power and Ground Distribution/Testing and Inspection/Symptom

Related Diagnostic Procedures/Power Mode Mismatch).

2. Perform the 10-Minute Immobilizer Relearn procedure. Refer to Immobilizer System Component Programming (See: Accessories and

Optional Equipment/Antitheft and Alarm Systems/Testing and Inspection/Programming and Relearning). The ECM should successfully

complete the password learn and the vehicle should start.

瀚慖f the ECM does not complete the learn or vehicle starting remains disabled, replace the ECM.

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 ECM replacement, setup, and programming

2ML70 - Automatic Transmission

DTC P0634

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 P0634

- Transmission Control Module (TCM) Overtemperature

Diagnostic Fault Information