2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2245

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2245

DTC P0711, P0712, or P0713

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 P0711

- Transmission Fluid Temperature (TFT) Sensor Performance

DTC P0712

- Transmission Fluid Temperature (TFT) Sensor Circuit Low Voltage

DTC P0713

- Transmission Fluid Temperature (TFT) Sensor Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

The primary source of heat in the transmission is the drive motor generators. The drive motor generators are cooled by the transmission fluid. Hot

fluid exits the drive motor generators and flows to the transmission cooler supply line. The supply line connects to the cooler, which is in front of

the radiator. The transmission fluid cooler pipe assembly is equipped with an internal thermostat that opens at 80掳C (176掳F) for optimum

transmission operation and fuel economy. The transmission cooler pipe thermostat is part of the transmission fluid cooler pipe assembly, located

near the transmission and is not serviced separately. From the cooler, the fluid returns through the transmission fluid cooler pipe assembly and

enters the lubrication circuits. After lubricating the internal components, the fluid returns to the oil pan. The transmission fluid temperature sensor is

located in the control solenoid valve assembly and is not serviced separately.

Conditions for Running the DTC

* No OSS DTCs P0721, P0722, or P0723, P077B, P215C.

* The engine run time is greater than 5 seconds.

* The system voltage is 11-18 V.

* The estimated drive motor power loss is greater than 0.4 kw for 200 seconds.

* The OSS is greater than 200 RPM for 5 seconds.

P0711

* The Trans. Fluid Temp. parameter is -50 to +21掳C (-58 to +70掳F) at start up.

* The ECT is greater than 70掳C (158掳F).

* The ECT is greater than 55掳C (131掳F) at start up.

* The vehicle speed is greater than 8 km/h (5 mph) for 300 seconds.

* The vehicle speed is less than 200 km/h (124 mph) for 5 seconds.

* The TCM temperature parameter is -49 to +169掳C (-56 to +336掳F).