Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC P2728: Pressure Control (PC) Solenoid 5 System PerformanceDTC 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 | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Clutch PC Solenoid 5 Control | P2729 | P2730 | P2730 | P2728 |
Circuit | Short to Ground | Open | Short to Voltage |
|---|---|---|---|
Operating Conditions: Engine running, normal operating temperature Parameter Normal Range: OK | |||
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 and is not serviced separately. The transmission control module (TCM) supplies 12 volts to the PC solenoid 5 through the high side driver 1 circuit. The TCM controls the PC solenoid 5 through the PC solenoid 5 control circuit. The normally low PC solenoid 5 flows fluid to the actuator feed limit valve when commanded ON and exhausts fluid when commanded OFF. The clutch PC 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 volts. |
Conditions for Setting the DTC
P2728
The TCM detects an internal electrical performance malfunction of the clutch PC solenoid 5 control circuit when the actual pressure does not equal the commanded pressure for 5 seconds.
P2729
The TCM detects an internal low voltage electrical malfunction of the clutch PC solenoid 5 control circuit for 500 milliseconds.
P2730
The TCM detects an internal high voltage electrical malfunction of the clutch PC solenoid 5 control circuit for 500 milliseconds
Action Taken When the DTC Sets
| • | DTC P2728 is a Type B DTC. |
| • | DTCs P2729 and P2730 are Type A DTCs. |
| • | The TCM defaults the transmission to a limited shift pattern utilizing 2 forward gears and reverse based on the default detected. |
| • | The TCM commands maximum line pressure. |
| • | The TCM freezes transmission adaptive functions. |
Conditions for Clearing the DTC
| • | DTC P2728 is a Type B DTC. |
| • | DTCs P2729 and P2730 are Type A DTCs. |
Diagnostic Aids
When attempting to set solenoid electrical DTCs, ensure the TCM is warmed up and the transmission is operated 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
Connector End View Reference
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Circuit/System Verification
Perform the following procedure to place the control solenoid (w/body and TCM) valve assembly under the optimal conditions to test solenoid electrical DTCs.
- Ensure the transmission fluid temperature is between 50-80°C (122-176°F).
- Operate the vehicle long enough to ensure at least a 3°C (5°F) rise in TCM temperature.
Circuit/System Testing
The scan tool data parameter PC 5 Sol. CKT Status normally displays OK.
| ⇒ | If the parameter displays Open/Short to Volts or Short to GND or if the DTC resets, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection , and if no concerns are found, replace the control solenoid (w/body and TCM) valve assembly. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for control solenoid (w/body and TCM) valve assembly replacement, setup, and programming.
