P2764
DTC P2762, P2763, or P2764
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) 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 High Voltage
DTC P2764
- Torque Converter Clutch (TCC) Pressure Control Solenoid Control Circuit Low Voltage
Diagnostic Fault Information
Typical Scan Tool Data
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 1 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 apply the TCC.
Conditions for Running the DTC
P2762
* DTC P2762 has not failed this ignition cycle.
* The engine speed is greater than 500 RPM for 5 seconds or greater.
* The ignition voltage is between 8.6-19.0 volts.
P2763
* DTC P2763 has not failed this ignition cycle.
* The engine speed is greater than 500 RPM for 5 seconds or greater.
* The ignition voltage is between 8.6-19.0 volts.
* The high side driver is enabled.
P2764
* DTC P2764 has not failed this ignition cycle.
* The engine speed is greater than 500 RPM for 5 seconds or greater.
* The ignition voltage is between 8.6-19.0 volts.
* The high side driver is enabled.
Conditions for Setting the DTC
P2762
The TCM detects an invalid voltage in the TCC pressure control solenoid circuit for 4.4 seconds or greater in a 5.0 second sample.
P2763
The TCM detects high voltage on the TCC pressure control solenoid control circuit for 4.4 seconds or greater in a 5.0 second sample.
P2764
The TCM detects low voltage on the TCC pressure control solenoid control circuit for 4.4 seconds or greater in a 5.0 second sample.
Action Taken When the DTC Sets
P2762
DTC P2762 is a Type C DTC.
P2763 or P2764
* DTCs P2763 and P2764 are Type A DTCs.
* The TCM inhibits TCC.
* The TCM commands maximum line pressure.
* The TCM freezes transmission adaptive functions.
* The TCM forces High Side Driver 1 OFF.
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 (Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector Views)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
Description and Operation
Transmission Component and System Description (Transmission Component and System Description)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Diagnostic Trouble Code Descriptions)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
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 High Side Driver 1 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 (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.
4. 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 (Verification Tests) after completing the diagnostic procedure.
* Control Module References (Programming and Relearning) for control solenoid (w/body and TCM) valve assembly replacement, setup, and programming.
* Perform the Service Fast Learn Adapts (Programming and Relearning).