Sunday, November 10, 2019

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 2674

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 2674

DTC P2719

- Pressure Control (PC) Solenoid 4 System Performance

DTC P2720

- Pressure Control (PC) Solenoid 4 Control Circuit Low Voltage

DTC P2721

- Pressure Control (PC) Solenoid 4 Control Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

The clutch pressure control solenoid 4 is part of the control solenoid valve assembly and is not serviced separately. The transmission control

module supplies 12 volts to the clutch pressure control solenoid 4 through the high side driver 1 circuit. The transmission control module controls

the clutch pressure control solenoid 4 through the clutch pressure control solenoid 4 control circuit. The normally low clutch pressure control

solenoid 4 flows fluid to the 1-3 clutch when commanded ON and exhausts fluid when commanded OFF. The clutch pressure control solenoid 4

regulates the transmission fluid pressure to the 1-3 clutch.

Conditions for Running the DTC

* The engine run time is greater than 5 seconds.

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

* The system voltage is 11-18 V.

Conditions for Setting the DTC

P2719

The transmission control module detects an internal electrical performance malfunction of the clutch pressure control solenoid 4 control circuit

when the actual 1-3 clutch pressure does not equal the commanded 1-3 clutch pressure for 5 seconds.

P2720

The transmission control module detects an internal low voltage electrical malfunction of the clutch pressure control solenoid 4 control circuit for

500 milliseconds.

P2721

The transmission control module detects an internal high voltage electrical malfunction of the clutch pressure control solenoid 4 control circuit for

500 milliseconds.

Action Taken When the DTC Sets

* P2719 is a Type B DTC.

* P2720 and P2721 are Type A DTCs.

* The transmission control module defaults the transmission to a limited shift pattern utilizing 2 forward gears and reverse based on the default

detected.

* The transmission control module commands maximum line pressure.

* The transmission control module freezes transmission adaptive functions.

Conditions for Clearing the DTC

* P2719 is a Type B DTC.

* P2720 and P2721 are Type A DTCs.

Diagnostic Aids

When attempting to set solenoid electrical DTCs, ensure the transmission control module is warmed up and the transmission is operated long

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