6T30/6T40/6T45 - Automatic Transmission
DTC P2762, P2763, or P2764
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions 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 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 (PC) solenoid is part of the control solenoid (w/body and TCM) valve assembly which has no serviceable parts. The normally low TCC PC solenoid regulates oil pressure to the TCC regulator valve and TCC control valve. Increasing TCC PC solenoid oil pressure increases oil pressure to the torque converter to apply the clutch. The transmission control module (TCM) varies the current to the TCC PC solenoid through a low side driver. Increasing current to the TCC PC solenoid increases oil pressure by closing OFF the solenoid exhaust port. Decreasing current to the TCC PC solenoid decreases oil pressure by opening up the solenoid exhaust port. The TCC PC solenoid power is supplied by the TCM through a high side driver (HSD). The HSD protects the circuit and components from excessive current flow. If excessive current flow is detected, the HSD will turn OFF. When the fault is corrected, the HSD will reset.
Conditions for Running the DTC
P2762, P2763, or P2764
* The engine speed is 500 RPM or greater for 5 seconds.
* The ignition voltage is between 9.0 volts and 18.0 volts.
Conditions for Setting the DTC
P2762
The TCM detects an internal electrical performance malfunction of the TCC PC solenoid control circuit where the measured TCC PC solenoid current does not equal the commanded TCC PC solenoid for 5 seconds.
P2763
The TCM detects an open/high resistance or short to voltage on the TCC PC solenoid control circuit for 5 seconds.
P2764
The TCM detects a short to ground on the TCC PC solenoid control circuit for 5 seconds.
Action Taken When the DTC Sets
P2762
DTC P2762 is a Type C DTC.
P2763
* DTC P2763 is a Type A DTC.
* The TCM inhibits 6th gear.
* The TCM forces TCC OFF.
* The TCM inhibits Tap Up/Down function.
* The TCM inhibits manual shifting of forward gears.
* The TCM changes to a Hot Mode shift pattern.
P2764
* DTC P2764 is a Type A DTC.
* The TCM inhibits TCC.
* The TCM commands maximum line pressure.
* The TCM freezes transmission adaptive functions.
* The TCM defaults the transmission to first or third gear and reverse.
* The TCM inhibits Tap Up/Down function.
* The TCM inhibits manual shifting of forward gears.
Conditions for Clearing the DIC/DTC
* DTC P2762 is a Type C DTC.
* DTCs P2763 and P2764 are Type A DTCs.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics 6T30/6T40/6T45 - Automatic Transmission
Connector End View Reference
* Component Connector End Views Connector End Views By Name
* Inline Harness Connector End Views Connector End Views By Number
Description and Operation
* Transmission General Description Transmission General Description
* Transmission Component and System Description Transmission Component and System Description
* Electronic Component Description Electronic Component Description
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References Programming and Relearning for scan tool information
Special Tools
DT-48616-10 - Jumper Harness
For equivalent regional tools, refer to Special Tools 6T30/6T40/6T45 - Automatic Transmission.
Circuit/System Verification
1. Operate the vehicle in 2nd gear long enough to ensure at least a 3°C (5°F) rise in TCM temperature.
2. Operate the vehicle in drive range and ensure TCC is commanded ON for 1 minute. Verify with a scan tool the following parameters display OK.
* TCC PC Sol Perf Test Status
* TCC PC Sol Ctrl Low Voltage Test Status
* TCC PC Sol Ctrl High Voltage Test Status
3. 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.
Circuit/System Testing
Note: You must perform the Circuit/System Verification first.
1. Ignition OFF, remove the control solenoid (w/body and TCM) assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly Replacement 6T30/6T40/6T45 - Automatic Transmission.
2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection Control Solenoid Valve and Transmission Control Module Assembly Inspection.
3. Place the control solenoid (w/body and TCM) valve assembly on a clean work surface near the transmission assembly.
4. Connect DT-48616-10 - harness between the vehicle wire harness electrical connector, and the control solenoid (w/body and TCM) valve assembly electrical connector.
5. Ignition ON, verify with a scan tool the following test status parameters display OK.
* TCC PC Sol Perf Test Status
* TCC PC Sol Ctrl High Voltage Test Status
* TCC PC Sol Perf Test Status
• If any test status parameter displays Fault or Malfunction, replace the control solenoid (w/body and TCM) valve assembly.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
Note: Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection Control Solenoid Valve and Transmission Control Module Assembly Inspection.
* Refer to 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 6T30/6T40/6T45 - Automatic Transmission following all transmission related repairs.