P2763
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 Valve Performance
DTC P2763
- Torque Converter Clutch (TCC) Pressure Control Solenoid Valve Control Circuit High Voltage
DTC P2764
- Torque Converter Clutch (TCC) Pressure Control Solenoid Valve Control Circuit Low Voltage
Circuit/System Description
The torque converter clutch pressure control solenoid is part of the control solenoid valve assembly which has no serviceable components. The normally low TCC pressure control solenoid regulates oil pressure to the TCC regulator valve and TCC control valve. Increasing TCC pressure control 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 pressure control solenoid by controlling the amount of time the low side driver is ON and OFF. Increasing current to the TCC pressure control solenoid increases oil pressure by closing OFF the solenoid exhaust port. Decreasing current to the TCC pressure control solenoid decreases oil pressure by opening up the solenoid exhaust port. TCC pressure control solenoid power is supplied by the TCM through a high side driver. The high side driver protects the circuit and components from excessive current flow. If excessive current flow is detected, the high side driver will turn OFF. When the fault is corrected, the high side driver will reset.
Conditions for Running the DTC
P2762
* DTC P2762 is not set.
* Engine speed is 400-7500 RPM for 5 seconds.
* Ignition voltage is 9-32 V.
P2763 or P2764
* DTC P0658 or P0659 is not set.
* Engine speed is 400-7500 RPM for 5 seconds.
* Ignition voltage is 9.0 V or greater.
* High side driver is enabled.
Conditions for Setting the DTC
P2762
TCM detects an internal electrical performance malfunction of the TCC pressure control solenoid control circuit where the measured TCC pressure control solenoid current does not equal the commanded TCC pressure control solenoid for 5 seconds.
P2763
TCM detects an open/high resistance or short to voltage on the TCC pressure control solenoid control circuit for 5 seconds.
P2764
TCM detects a short to ground on the TCC pressure control 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 B DTC.
* TCM inhibits 6th gear.
* TCM forces TCC OFF.
* TCM changes to a Hot Mode shift pattern.
P2764
* DTC P2764 is a Type A DTC.
* TCM inhibits TCC.
* TCM commands maximum line pressure.
* TCM freezes transmission adaptive functions.
* TCM defaults the transmission to 4th gear and reverse.
* TCM inhibits neutral idle.
* TCM inhibits Tap Up/Down function.
* TCM inhibits manual shifting of forward gears.
* TCM forces the high side driver OFF.
* TCM enables torque management.
* TCM inhibits auto grade braking.
* TCM inhibits powertrain braking.
Conditions for Clearing the DIC/DTC
* DTC P2762 is a Type C DTC.
* DTC P2763 is a Type B DTC.
* DTC P2764 is a Type A DTC.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics Electrical Diagrams
Connector End View Reference
* Component Connector End Views Fuel Pump and Level Sensor Assembly
* Inline Harness Connector End Views X100
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 Control Module References for scan tool information
Special Tools
DT-48616-10 - Adapter Harness
For equivalent regional tools, refer to Special Tools Tools and Equipment.
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.
3. Verify the scan tool parameters listed below do not display Malfunction:
* TCC Pressure Control Solenoid Valve Performance Test Status
* TCC Pressure Control Solenoid Valve Control Circuit Low Voltage Test Status
* TCC Pressure Control Solenoid Valve Control Circuit High Voltage Test Status
• If Malfunction is displayed
Refer to Circuit/System Testing.
• If Malfunction is not displayed
4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
5. Verify the DTC does not set.
• If a DTC sets
Refer to Circuit/System Testing.
• If a DTC does not set
6. All OK
Circuit/System Testing
Note: You must perform the Circuit/System Verification first.
1. Ignition OFF, remove the Q8 Control Solenoid Valve Assembly.
2. Verify the Q8 Control Solenoid Valve Assembly is not contaminated with any debris and clean as necessary. Refer to Control Solenoid Valve and Transmission Control Module Assembly Inspection Control Solenoid Valve and Transmission Control Module Assembly Inspection.
• If contamination is present
Repair as necessary.
• If contamination is not present
3. Verify the resistance is within range the specified range for each solenoid listed in the Control Solenoid Valve and Transmission Control Module Assembly Inspection Control Solenoid Valve and Transmission Control Module Assembly Inspection.
• If the resistance is not within range
Replace the Q8 Control Solenoid Valve Assembly.
• If the resistance is within range
4. Place the Q8 Control Solenoid Valve Assembly on a clean work surface near the transmission assembly.
5. Connect the DT-48616-10 - adapter harness between the vehicle harness connector and the Q8 Control Solenoid Valve Assembly connector. Ignition ON.
6. Verify the scan tool parameters listed below do not display Malfunction:
* Pressure Control Solenoid Valve 2 Performance Test Status
* Pressure Control Solenoid Valve 2 Control Circuit Low Voltage Test Status
* Pressure Control Solenoid Valve 2 Control Circuit High Voltage Test Status
• If Malfunction is displayed
Replace the Q8 Control Solenoid Valve Assembly.
• If Malfunction is not displayed
7. All OK
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Perform the Transmission Adaptive Values Learn Transmission Adaptive Values Learn following all transmission repairs.
* Control Solenoid Valve and Transmission Control Module Assembly Replacement Service and Repair
* Control Module References Control Module References for control solenoid valve assembly replacement, programming and setup.