Diagnostic Instructions

DTC Descriptors

DTC P2728:  Clutch Pressure Control (PC) Solenoid 5 System Performance

DTC P2729:  Clutch Pressure Control (PC) Solenoid 5 Control Circuit Low Voltage

DTC P2730:  Clutch Pressure Control (PC) Solenoid 5 Control Circuit High Voltage

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Clutch PC Solenoid 5 Control	P2729	P2730	P2730	P2728

Typical Scan Tool Data

Clutch PC Solenoid 4 Scan Tool Data

Circuit	Grounded	Open	Shorted to Voltage
Operating conditions: Engine running, normal operating temperature Parameter Normal Range: OK
Clutch PC 5 Sol. CKT Status	Short to GND	Open/Short to Volts	Open/Short to Volts

Circuit/System Description

The clutch pressure control (PC) solenoid 5 is part of the control solenoid (w/body and TCM) valve assembly. The control solenoid (w/body and TCM) valve assembly has no seviceable parts. The TCM supplies 12 volts to the clutch PC solenoid 5 through the high side driver circuit. The TCM controls the clutch PC solenoid 5 through the clutch PC solenoid 5 control circuit. The normally low clutch PC solenoid 5 flows fluid to the 1-2-3-4 clutch when commanded ON and exhausts fluid when commanded OFF. This allows the clutch PC solenoid 5 to regulate the transmission fluid pressure to the 1-2-3-4 clutch.

Conditions for Running the DTC

Conditions for Setting the DTC

P2728

The TCM detects an internal electrical performance malfunction of the clutch PC solenoid 5 control circuit where the actual 1-2-3-4 clutch pressure does not equal the commanded 1-2-3-4 clutch pressure for 10.5 seconds or greater.

P2729

The TCM detects an internal low voltage electrical malfunction of the clutch PC solenoid 5 control circuit for 300 milliseconds.

P2730

The TCM detects an internal high voltage electrical malfunction of the clutch PC solenoid 5 control circuit for 300 milliseconds.

Action Taken When the DTC Sets

P2728

P2729 and P2730

Conditions for Clearing the DTC

Diagnostic Aids

P2728

DTC P2728 detects an out of range error in the 1-2-3-4 clutch variable bleed solenoid (VBS) electrical rationality test.

P2729

DTC P2729 detects a continuous short to ground in the 1-2-3-4 clutch VBS control circuit.

P2730

DTC P2730 detects a continuous open or short to voltage in the 1-2-3-4 clutch VBS control circuit.

When attempting to set solenoid electrical DTCs, ensure the TCM is warmed up and the transmission is operated in second gear long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Description and Operation

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ensure the transmission fluid temperature is between 50-80°C (122-176°F).
2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Cleaning procedure to dislodge debris and free up valves.
3. Operate the vehicle in 2nd gear long enough to ensure at least a 3°C (5°F) rise in TCM temperature.
4. Verify that the scan tool data parameter, Clutch PC 5 Sol. CKT Status, displays OK.

⇒	If not the specified value, replace the control solenoid (w/body and TCM) valve assembly.

5. 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 after completing the diagnostic procedure.