2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1495

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1495

(DTC) Type Definitions)

Scan Tool Reference

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

Circuit/System Verification

1. Ignition ON, review the Failure Records when the DTC set. Verify the scan tool ECT Sensor parameter is less than 125掳C (257掳F).

瀚慖f greater than the specified range, refer to Engine Overheating (See: Engine, Cooling and Exhaust/Cooling System/Testing and

Inspection/Symptom Related Diagnostic Procedures/Engine Overheating).

2. Engine running, accessories OFF, measure and record the battery voltage at the battery terminals with a DMM. The voltage should be

between 12.6-15.0 volts.

瀚慖f not within the specified range, or the charge indicator light is ON, refer to Charging System Test (See: Starting and Charging/Testing

and Inspection/Component Tests and General Diagnostics/Charging System Test).

3. Perform the Transmission Fluid Level and Condition Check (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing

and Inspection/Component Tests and General Diagnostics/6T70/6T75 - Automatic Transmission/Transmission Fluid Level and Condition

Check) to verify correct fluid level and condition.

4. Perform the Transmission Fluid Cooler Flushing and Flow Test (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/6T70/6T75 - Automatic

Transmission/Transmission Fluid Cooler Flushing and Flow Test) to verify proper transmission oil cooler flow.

5. Operate the vehicle within the conditions for running and setting the DTC until normal engine temperature is reached. Verify the scan tool

TCM Temperature parameter is less than 146掳C (295掳F).

瀚慖f greater than the specified range, inspect the transmission cooling system for obstructions to the airflow of the radiator or transmission

due to debris, kinked, or damaged transmission fluid lines, or damage to the transmission cooler. If all the items test normal, replace the

control solenoid valve assembly.

6. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

Repair Instructions

Important:

* Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and

Inspection/Programming and Relearning) following all transmission related repairs.

* Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (See:

Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component Tests and General

Diagnostics/6T70/6T75 - Automatic Transmission/Control Solenoid Valve and Transmission Control Module Assembly Inspection).

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 valve assembly replacement, setup,

and programming

P0638

DTC P0638, P2100-P2103, or P2119 (Without LF1, LFW)

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 Descriptors

DTC P0638

- Throttle Actuator Control (TAC) Command Performance

DTC P2100

- Throttle Actuator Control (TAC) Motor Control Circuit