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DTC P2762, P2763, or P2764

Diagnostic 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

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

TCC Pressure Control Solenoid Control

P2764

P2763

P2763

P2762

Typical Scan Tool Data

TCC Pressure Control Solenoid Valve Performance Test Status

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Operating Conditions: Engine running, normal operating temperature

Parameter Normal Range: OK

TCC Pressure Control Solenoid Control

--

--

--

Fault or Malfunction

TCC Pressure Control Solenoid Valve Control Circuit High Voltage Test Status

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Operating Conditions: Engine running, normal operating temperature

Parameter Normal Range: OK

TCC Pressure Control Solenoid Control

-

Fault or Malfunction

Fault or Malfunction

-

TCC Pressure Control Solenoid Valve Control Circuit Low Voltage Test Status

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Operating Conditions: Engine running, normal operating temperature

Parameter Normal Range: OK

TCC Pressure Control Solenoid Control

Fault or Malfunction

--

--

--

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

    • The engine speed is 400 RPM or greater for 5 seconds.
    • The ignition voltage is 9.0 volts or greater.
    • DTC P2762 is not set.

P2763

    • The engine speed is 400 RPM or greater for 5 seconds.
    • The ignition voltage is 9.0 volts or greater.
    • DTC P0658, P0659, or P2763 is not set.
    • The HSD is enabled.

P2764

    • The engine speed is 400 RPM or greater for 5 seconds.
    • The ignition voltage is 9.0 volts or greater.
    • DTC P0658, P0659, or P2764 is not set.
    • The HSD 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-circuit to voltage on the TCC PC solenoid control circuit for 5 seconds.

P2764

The TCM detects a short-circuit 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.
    • 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 5th gear and reverse.
    • The TCM inhibits Tap Up/Down function.
    • The TCM inhibits manual shifting of forward gears.
    • The TCM forces the high side driver OFF.
    • The 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

Connector End View Reference

    •  Component Connector End Views
    •  Inline Harness Connector End Views

Description and Operation

    •  Transmission General Description
    •  Transmission Component and System Description
    •  Electronic Component 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-48616-10 Adapter Harness

For equivalent regional tools, refer to Special Tools .

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.
  3. • 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
  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 .

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 .
  2. Perform the 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-48616-10 harness between the vehicle wire harness X1 14-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.
  6. • 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.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

       Note: Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .

    • Refer to Control Module References for control solenoid valve assembly replacement, set-up, and programming.
    • Perform the Transmission Adaptive Values Learn following all transmission related repairs.
   


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