2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2227

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2227

Circuit/System Verification

1. Engine idling at normal operating temperature, verify the scan tool TCM Temperature parameter is between -247 and +247掳C (-412 and

+477掳F).

瀚慖f not within the specified range, replace the Q8 control solenoid valve assembly.

2. Operate the vehicle at 64 km/h (40 mph) for 10 minutes. Monitor the TCM Temperature parameter and the Transmission Fluid Temperature

parameter with a scan tool. The TCM Temperature parameter should increase by more than 2掳C (3.5掳F). Also, the TCM Temperature

parameter and the Transmission Fluid Temperature parameter should be within 10掳C (18掳F) of each other.

瀚慖f the TCM Temperature parameter does not increase by more than 2掳C (3.5掳F) or the TCM Temperature parameter value is not within 10

掳C (18掳F) of the Transmission Fluid Temperature parameter, then replace the Q8 control solenoid valve assembly.

3. 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

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

* Control solenoid valve assembly replacement. Refer to Control Module References (See: Testing and Inspection/Programming and

Relearning) for replacement, setup, and programming.

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

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

2ML70 - Automatic Transmission

DTC P0667, P0668, or P0669

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 P0667

- Transmission Control Module (TCM) Temperature Sensor Performance

DTC P0668

- Transmission Control Module (TCM) Temperature Sensor Circuit Low Voltage

DTC P0669

- Transmission Control Module (TCM) Temperature Sensor Circuit High Voltage

Circuit/System Description

The transmission control module temperature sensor is located inside of the transmission control module. The transmission control module is

located within the control solenoid valve assembly and is not serviced separately. The transmission control module temperature sensor provides the

transmission control module temperature. This temperature reading is used in various shifting and diagnostic routines in the transmission control

module software.

Conditions for Running the DTC

* Ignition voltage is 11-18 V.

* The engine speed is greater than 450 RPM.

* No DTCs P0722 or P0723.

P0667

* No DTCs P0711, P0712, P077B, or P215C.

* DTC P0667 has not passed this key ON.

* The transmission control module temperature is between -39 and +149掳C (-38 and +300掳F).