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 P0965: Clutch Pressure Control (PC) Solenoid 2 System Performance
DTC P0966: Clutch Pressure Control (PC) Solenoid 2 Control Circuit Low Voltage
DTC P0967: Clutch Pressure Control (PC) Solenoid 2 Control Circuit High Voltage

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
Clutch PC Solenoid 2 Control | P0966 | P0977 | P0977 | P0965
Clutch PC Solenoid 2 High Side Driver 2 | P1833 | P1833 | P1834 | P0965

### Typical Scan Tool Data

#### Clutch PC Solenoid 2

Circuit | Normal Range | Short to Ground | Open | Short to Voltage
--- | --- | --- | --- | ---
Operating Conditions: Key ON, Engine OFF or Engine running, normal operating temperature
Clutch PC 2 Sol. CKT Status | OK | Short to GND | Open/Short to Volts | Open/Short to Volts
High Side Driver 2 CKT Status | OK | Open/Short to GND | Open/Short to GND | Short to Volts

### Circuit/System Description

The clutch pressure control (PC) solenoid 2 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 clutch PC solenoid 2 on the high side driver 2 circuit. The TCM control the PC solenoid 2 through the clutch PC solenoid 2 control circuit. The normally high clutch PC solenoid 2 flows fluid to the 3-5-R clutch when commanded OFF and exhausts fluid when commanded ON. The clutch PC 2 regulates the transmission fluid pressure to the 3-5-R clutch.

### Conditions for Running the DTC

#### P0965

Start the ignition switch, run the engine.

#### P0966

• | DTC P0966 is not set.

• | Start the ignition switch, run the engine.

#### P0967

• | DTC P0967 is not set.

• | Start the ignition switch, run the engine.

### Conditions for Setting the DTC

#### P0965

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

#### P0966

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

#### P0967

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

### Action Taken When the DTC Sets

• | DTC P0965 is a type C DTC.

• | DTCs P0966 and P0967 is a type A DTC.

• | The TCM defaults the transmission to a limited shift pattern, 2 forward gears and reverse, based on the fault detected.

• | The TCM commands maximum line pressure.

• | The TCM freezes transmission adaptive functions.

### Conditions for Clearing the DTC

• | DTC P0965 is a type C DTC.

• | DTCs P0966 and P0967 is a type A DTC.

### Diagnostic Aids

When attempting to set DTCs, it may be helpful to 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 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

• | Automatic Transmission Inline 16-Way Connector End View

• | Automatic Transmission Internal Connector End Views

• | Automatic Transmission Related 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

#### Scan Tool Reference

• | Scan Tool Data List

• | Scan Tool Data Definitions

• | Scan Tool Output Controls

### 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.

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

### Component Testing

The scan tool data parameter Clutch PC 2 Sol. CKT Status normally displays OK.

If the parameter displays Open/Short to Volts, 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