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
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 valve assembly which has no serviceable components. 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
* Engine speed is 400 RPM or greater for 5 seconds.
* Ignition voltage is 9.0 volts or greater.
* DTC P2762 is not set.
P2763
* Engine speed is 400 RPM or greater for 5 seconds.
* Ignition voltage is 9.0 volts or greater.
* DTC P0658, P0659, or P2763 is not set.
* HSD is enabled.
P2764
* Engine speed is 400 RPM or greater for 5 seconds.
* Ignition voltage is 9.0 volts or greater.
* DTC P0658, P0659, or P2764 is not set.
* HSD is enabled.
Conditions for Setting the DTC
P2762
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
TCM detects an open/high resistance or short to voltage on the TCC PC solenoid control circuit for 5 seconds.
P2764
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 B DTC.
* TCM inhibits 6th gear.
* TCM forces TCC OFF.
* TCM inhibits Tap Up/Down function.
* TCM inhibits manual shifting of forward gears.
* 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 5th 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.
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 6T30/6T40/6T45/6T50 - 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.
3. Verify with a scan tool the following parameters display OK.
* 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 any test status parameter displays Fault or Malfunction
Refer to Circuit/System Testing below.
• If all test status parameters display OK
4. After performing the above steps, verify that the DTC does not reset by operating the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions you observe from the Freeze Frame/Failure Records data. If the vehicle passes the Circuit/System Verification procedure, then STOP. Do not perform the Circuit/System Testing or Component Testing as this may result in an unnecessary part replacement. Refer to Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections.
Circuit/System Testing
Note: You must perform the Circuit/System Verification first.
1. Ignition OFF, remove the Q8 control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly Replacement Service and Repair.
2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (Gen 1 with 1.4L - LCU, 1.6L - LDE or LFJ, 1.8L - LUW) Control Solenoid Valve and Transmission Control Module Assembly Inspection (Gen 1 with 1.4L - LCU, 1.6L - LDE or LFJ, 1.8L - LUControl Solenoid Valve and Transmission Control Module Assembly Inspection (Gen 2 with 1.4L - LUV) Control Solenoid Valve and Transmission Control Module Assembly Inspection (Gen 2 with 1.4L - LUV). The Q8 control solenoid valve assembly must be externally cleaned of all debris.
3. Place the Q8 control solenoid valve assembly on a clean work surface near the transmission assembly.
4. Connect the DT-48616-10 - harness between the vehicle wire harness X1 14-way transmission electrical connector, and the Q8 control solenoid valve assembly electrical connector, ignition ON.
5. Verify with a scan tool the following test status parameters display OK.
* 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 any test status parameter displays Fault or Malfunction
Replace the Q8 control solenoid valve assembly.
• If all test status parameters display OK
6. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
Note: Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (Gen 1 with 1.4L - LCU, 1.6L - LDE or LFJ, 1.8L - LUW) Control Solenoid Valve and Transmission Control Module Assembly Inspection (Gen 1 with 1.4L - LCU, 1.6L - LDE or LFJ, 1.8L - LUControl Solenoid Valve and Transmission Control Module Assembly Inspection (Gen 2 with 1.4L - LUV) Control Solenoid Valve and Transmission Control Module Assembly Inspection (Gen 2 with 1.4L - LUV).
* Refer to Control Module References Control Module References for control solenoid valve assembly replacement, programming and setup.
* Perform the Transmission Adaptive Values Learn Programming and Relearning following all transmission related repairs.