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
