Sunday, November 10, 2019

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 2690

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 2690

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

Repair Instructions

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

Control Module References (See: Testing and Inspection/Programming and Relearning) for Q8 control solenoid valve assembly replacement,

setup, and programming.

2ML70 - Automatic Transmission

DTC P2728-P2730

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 P2728

- Pressure Control (PC) Solenoid 5 System Performance

DTC P2729

- Pressure Control (PC) Solenoid 5 Control Circuit Low Voltage

DTC P2730

- Pressure Control (PC) Solenoid 5 Control Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

The clutch pressure control solenoid 5 is part of the control solenoid valve assembly and is not serviced separately. The transmission control

module supplies 12 volts to the PC solenoid 5 through the high side driver 1 circuit. The transmission control module controls the clutch pressure

control solenoid 5 through the clutch pressure control solenoid 5 control circuit. The normally low clutch pressure control solenoid 5 flows fluid to

the actuator feed limit valve when commanded ON and exhausts fluid when commanded OFF. The clutch pressure control solenoid 5 regulates the

transmission fluid pressure from the auxiliary transmission fluid pump in order to maintain transmission fluid pressure during electric only and

auto-stop modes.

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

P2728

The transmission control module detects an internal electrical performance malfunction of the clutch pressure control solenoid 5 control circuit

when the actual pressure does not equal the commanded pressure for 5 seconds.

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