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 P2762: Torque Converter Clutch (TCC) Pressure Control Solenoid System Performance
DTC P2763: Torque Converter Clutch (TCC) Pressure Control Solenoid Control Circuit Low Voltage
DTC P2764: Torque Converter Clutch (TCC) Pressure Control Solenoid Control Circuit High Voltage

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
TCC Pressure Control Solenoid | P2763 | P2764 | P2764 | P2762
TCC Pressure Control Solenoid Side Driver 2 | P1833 | P1833 | P1834 | P2762

### Typical Scan Tool Data

#### TCC PC Solenoid

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

### Circuit/System Description

The torque converter clutch (TCC) pressure control solenoid is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The TCM supplies 12 volts to the TCC pressure control solenoid through the high side driver 2 circuit. The TCM controls the TCC solenoid through the TCC solenoid control circuit. The normally low TCC pressure control solenoid flows fluid to the TCC when commanded ON and exhausts fluid when commanded OFF. The TCC solenoid regulates the transmission fluid pressure to the TCC.

### Conditions for Running the DTC

#### P2762

Start the ignition voltage, run the engine.

#### P2763

• | DTC P2763 is not set.

• | Start the ignition voltage, run the engine.

• | Active the high side driver.

#### P2764

• | DTC P2764 is not set.

• | Start the ignition voltage, run the engine.

• | Active the high side driver.

### Conditions for Setting the DTC

#### P2762

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

#### P2763

The TCM detects an internal low voltage electrical malfunction of the converter clutch PC solenoid 4 control circuit for 4.4 seconds in the 5 seconds sample time.

#### P2764

The TCM detects an internal high voltage electrical malfunction of the converter clutch PC solenoid 4 control circuit for 4.4 seconds in the 5 seconds sample time.

### Action Taken When the DTC Sets

• | DTC P2762 is a Type C DTC.

• | DTCs P2763 and P2764 are Type A DTCs.

• | The TCM inhibits 6th gear in Hot Mode.

• | The TCM inhibits TCC.

• | The TCM commands maximum line pressure.

• | The TCM freezes transmission adaptive functions.

### Conditions for Clearing the DIC/DTC

• | DTC P2762 is a Type C DTC.

• | DTCs P2763 and P2764 are Type A DTCs.

### Diagnostic Aids

When attempting to set solenoid electrical DTCs, ensure the TCM is warmed up and the transmission is operated in 2nd 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

#### 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 Output Controls

• | Scan Tool Data List

• | Scan Tool Data Definitions

### Circuit/System Testing

1. Ensure the transmission fluid temperature is between 50-80°C (122-176°F).
2. Operate the vehicle in 2nd gear long enough to ensure at least a 3°C (5°F) rise in TCM temperature, then operate the vehicle to ensure TCC engagement for 5 seconds.
3. Observe the scan tool data parameter TCC PC Sol. CKT Status, the parameter should display 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.

⇒ | If no concerns are found during the inspection, 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