For 1990-2009 cars

### 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 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
Clutch PC Solenoid 5 High Side Driver 2 | P1833 | P1833 | P1834 | P2728

### Typical Scan Tool Data

#### Clutch PC Solenoid 5

Circuit | Grounded | Open | Shorted to Voltage
--- | --- | --- | ---
Operating conditions: Engine running, normal operating temperature Parameter Normal Range: OK
PC 5 Sol. CKT Status | Short to GND | Open/Short to Voltage | Open/Short to Voltage
High Side Driver 2 CKT Status | Open/Short to GND | Open/Short to GND | Short to Voltage

### 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 TCM supplies 12 volts to the clutch PC solenoid 5 through the high side driver 2 circuit. The TCM control 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. The clutch PC solenoid 5 regulates the transmission fluid pressure to the 1-2-3-4 clutch.

### Conditions for Running the DTC

#### P2728

Start the ignition voltage, run the engine.

#### P2729

• | DTC P2729 is not set.

• | Start the ignition voltage, run the engine.

#### P2730

• | DTC P2730 is not set.

• | Start the ignition voltage, run the engine.

### Conditions for Setting the DTC

#### P2728

The TCM detects an internal electrical performance malfunction of the clutch PC solenoid 5 control circuit and the actual 1-2-3-4 clutch pressure does not equal the commanded 1-2-3-4 clutch pressure for 4.4 seconds in the 5 seconds sample time.

#### P2729

The TCM detects an internal low voltage electrical malfunction of the clutch PC solenoid 5 control circuit for 300 milliseconds in the 375 milliseconds sample time.

#### P2730

The TCM detects an internal high voltage electrical malfunction of the clutch PC solenoid 5 control circuit for 300 milliseconds in the 375 milliseconds sample time.

### Action Taken When the DTC Sets

• | DTC P2728 is a type C DTC.

• | DTCs P2729 and P2730 is a type A DTC.

• | The TCM defaults the transmission to a limited shift pattern, 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 C DTC.

• | DTCs P2729 and P2730 is a type A DTC.

### Diagnostic Aids

When attempting to set 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 DTCs.

### Reference Information

#### Schematic Reference

Automatic Transmission Controls Schematics

#### Connector End View Reference

Component Connector End Views

#### DTC Type Reference

• | Diagnostic Trouble Code (DTC) Type Definitions

• | Diagnostic Trouble Code (DTC) List/Type

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

### Circuit 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.

1. Ensure the transmission fluid temperature is between 50 and 80°C (122 and 176°F).
2. Operate the vehicle in second gear long enough to ensure at least a 3°C (5°F) rise in TCM substrate temperature.

### Component Testing

The scan tool data parameter Clutch 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.

• | Service Fast Learn Adapts

• | Control Module References for TCM replacement, setup, and programming