P2762
DTC P2762, P2763, or P2764Diagnostic 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 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
TCC Pressure Control Solenoid Valve Control Circuit Status
TCC Pressure Control Solenoid Valve Control Circuit Low Voltage Test Status
TCC Pressure Control Solenoid Valve Control Circuit High Voltage Test Status
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 pressure control solenoid controls oil pressure to the TCC regulating valve and TCC control valve. Increasing the pressure for the TCC pressure control solenoid increases the oil pressure to the torque converter to activate 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. Reducing the current to the TCC pressure control solenoid reduces the oil pressure by opening the solenoid's exhaust port. The TCC pressure control solenoid is supplied by TCM via a driver on the high side (HSD). HSD protects the circuit and components against too high 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
- DTC P2762 is not set.
- The engine speed is 400 RPM or greater for 5 seconds.
- The ignition voltage is 8.6 volts or greater.
P2763
- DTC P0658, P0659, or P2763 is not set.
- The engine speed is 400 RPM or greater for 5 seconds.
- The ignition voltage is 8.6 volts or greater.
- The high side driver is enabled.
P2764
- DTC P0658, P0659, or P2764 is not set.
- The engine speed is 400 RPM or greater for 5 seconds.
- The ignition voltage is 8.6 volts or greater.
- The high side driver is enabled.
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 pressure solenoid control circuit for 5 seconds.
P2764
The TCM detects a short to ground on the TCC pressure 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.
- The TCM inhibits 6th gear.
- The TCM forces TCC OFF.
- The TCM commands the hot mode shift pattern.
- The TCM inhibits Tap Up/Down function.
- The TCM inhibits manual shifting of forward gears.
P2764
- DTC P2764 is a Type A DTC.
- The TCM inhibits TCC.
- The TCM freezes transmission adaptive functions.
- The TCM commands maximum line pressure.
- The TCM inhibits Tap Up/Down function.
- The TCM inhibits manual shifting of forward gears.
- The TCM limits the transmission to Reverse and 5th gear operation.
- The TCM turns the HSD OFF.
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
Connector End View Reference
- Component Connector End Views
- Inline Harness Connector End Views
Description and Operation
Transmission General Description
Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Special Tools
DT-47825-20 Adapter Harness
For equivalent regional tools, refer to Special Tools.
Circuit/System Verification
1. Operate the vehicle in second 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 test status parameters displays OK:
- TCC Pressure Control Solenoid Valve Control Circuit Status
- TCC Pressure Control Solenoid Valve Control Circuit High Voltage Test Status
- TCC Pressure Control Solenoid Valve Control Circuit Low Voltage Test Status
3. After performing the above steps, verify that the DTC does not reset by operating the vehicle within the conditions for running fault codes (DTC). You may also operate the vehicle within the conditions you observe from the freeze frame/failure records. If the vehicle passes the circuit/system verification procedure, then stop. Do not perform the circuit/system test or component test as this may result in unnecessary part replacement. Refer to Testing for Intermittent Conditions and Poor Connections.
Circuit/System Testing
1. Note
You must perform the Circuit/System Verification first.
Remove control solenoid valve assembly Q8 with ignition OFF. See Replacing control solenoid valve assembly and transmission control module.
2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection. Control Solenoid Valve and Transmission Control Module Assembly Inspection
3. Place the Q8 control solenoid valve assembly on a clean work surface near the transmission assembly.
4. Connect the DT-47825-20 harness between the vehicle wire harness X1 20-way transmission electrical connector, and the Q8 control solenoid valve assembly electrical connector.
5. Ignition ON, verify with a scan tool the following test status parameters display OK:
- TCC Pressure Control Solenoid Valve Control Circuit Status
- TCC Pressure Control Solenoid Valve Control Circuit High Voltage Test Status
- TCC Pressure Control Solenoid Valve Control Circuit Low Voltage Test Status
6. If any test status parameter displays Fault or Malfunction, replace the Q8 control solenoid valve assembly.
Repair Instructions
Note
- Perform the Transmission Adaptive Values Learn following all transmission related repairs. Programming and Relearning
- Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection. Control Solenoid Valve and Transmission Control Module Assembly Inspection
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for control solenoid valve assembly replacement, setup, and programming