DTC P2762, P2763, or P2764
Diagnostic Instructions
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. |
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. |
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. |
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 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
Description and Operation
Electrical Information Reference
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
- Operate the vehicle in 2nd gear long enough to ensure
at least a 3°C (5°F) rise in TCM temperature.
- 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 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 |
- 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.
- Ignition OFF, remove the Q8 control solenoid valve
assembly. Refer to
Control Solenoid Valve and Transmission Control Module Assembly
Replacement .
- Perform the
Control Solenoid Valve and Transmission Control Module Assembly
Inspection .
- Place the Q8 control solenoid valve assembly on a
clean work surface near the transmission assembly.
- 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, 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. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|