DTC P2761, P2763, or P2764
Diagnostic Instructions
DTC Descriptors
| DTC P2761: 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
|
Torque Converter Clutch Pressure Control Solenoid Valve
Control
|
P2763
|
P2764
|
P2764
|
P2761
|
Low Reference
|
-
|
P2761, P2764
|
P2761, P2764
|
P2761, P2764
|
|
| |
Typical Scan Tool Data
TCC Pressure Control Solenoid Valve Current
Circuit
|
Short to Ground
|
Open
|
Short to Voltage
|
Operating Conditions: Engine running,
normal operating temperature
Parameter Normal Range: 100-1 100 mA
|
Torque Converter Clutch Pressure Control Solenoid Valve
Control
|
0 mA
|
0 mA
|
2 550 mA
|
Low Reference
|
-
|
0 mA
|
1
|
1. Internal transmission control module (TCM) damage may occur if
shorted to B+
|
|
| |
Circuit/System Description
Based on input speed and output speed signals, signals from the
engine control module (engine speed and throttle opening) and
vehicle speed, smooth lock-up control and slip is performed through
the lock-up control solenoid (SLU). The SLU is linearly turned ON
and OFF. The lock-up clutch inside the torque converter is
operated, and the pump impeller and turbine runner are connected.
Through this, the engine and the automatic transmission are coupled
and engine output is connected directly to the automatic
transmission, eliminating transmission loss. By sliding the lock-up
clutch when lock-up is in the OFF range, extends the lock-up range
to low vehicle speeds. It also suppresses a rise in engine speed
and increases transmission efficiency, improving fuel economy and
at the same time, through the sliding of the lockup clutch, engine
vibration can be absorbed by the torque converter.
Conditions for Running the DTC
P2761
| • |
The ignition voltage is
10.2-15.5 V. |
| • |
The engine speed is greater
than 400 RPM for 2 s. |
| • |
The transmission is not in
emergency mode. |
| • |
Transmission Control Module
(TCM) communication is normal. |
| • |
DTCs P2763 and P2764 are not
set. |
P2763
| • |
The ignition voltage is
10.2-15.5 V. |
| • |
The engine speed is greater
than 400 RPM for 2 s. |
| • |
The transmission is not in
emergency mode. |
| • |
TCM communication is
normal. |
P2764
| • |
The ignition voltage is
10.2-15.5 V. |
| • |
The engine speed is greater
than 400 RPM for 2 s. |
| • |
The transmission is not in
emergency mode. |
| • |
TCM communication is
normal. |
Conditions for Setting the DTC
P2761
Deviation between commanded current and feedback current.
P2763
The TCM detects at least 5 times less than 23 mA current
consumption of the SLU control circuit for 100 ms.
P2764
The TCM detects at least 5 times more than 1.33 A current
consumption of the SLU control circuit for 100 ms.
Action Taken When the DTC Sets
P2761
| • |
DTC P2761 is a Type B
DTC. |
| • |
The TCM turns OFF all
solenoids. |
| • |
The TCM allows the vehicle to
operate only in second gear and "R" range after a stop.
|
P2763, P2764
| • |
DTCs P2763 and P2764 are Type
B DTCs. |
| • |
No self learning
function. |
| • |
The TCM turns OFF all
solenoids. |
| • |
The TCM allows the vehicle to
operate only in second gear and "R" range after a stop.
|
Conditions for Clearing the DTC
P2761
| • |
DTC P2761 is a Type B
DTC. |
| • |
The TCM detects the error
current less than 50 mA for 2.75 ms. |
P2763, P2764
| • |
DTCs P2763 and P2764 are Type
B DTCs. |
| • |
The current consumption of the
SLU control circuit is 0.1-1.1 A for 500 ms. |
Diagnostic Aids
When attempting to set solenoid electrical DTCs, ensure the TCM
is warmed up and the transmission is operated in 2nd gear long
enough to ensure a 3°C (5°F) increase in TCM substrate
temperature. This will place the TCM in the optimal condition to
test solenoid electrical DTCs.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics
Connector End View Reference
Component Connector End Views
Electrical Information Reference
Description and Operation
Transmission Component and System Description
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
| 1. |
Ensure the transmission fluid
temperature is between 50-80°C (122-176°F). |
| 2. |
Operate the vehicle in 2nd
gear long enough to ensure at least a 3°C (5°F) rise in
transmission fluid temperature, then operate the vehicle in Park
for 5 s. |
| 3. |
Observe the scan tool data TCC
Pressure Control Solenoid Valve Current parameter, the reading
should be between 0.1-1.1 A. |
Circuit/System Testing
Command the TCC Solenoid Valve increase and decrease with a scan
tool. The value should rise from 0.1-1.1 A and return to 0.1 A.
If the value does not change, turn ignition OFF, remove the K71
Transmission Control Module. Connect a test lamp between the low
reference circuit terminal 4 X2 at the K71 Transmission Control
Module and the voltage supply component circuit terminal 9 X2 at
the K71 Transmission Control Module. Command the TCC Solenoid Valve
increase and decrease with a scan tool. The test lamp has to
illuminate brighter with increasing current. If the test lamp
always illuminates or always does not illuminate, replace the K71
Transmission Control Module.
Component Testing
Static Test
| 1. |
Ignition OFF, remove the K71
Transmission Control Module. |
| 2. |
Test for 5-5.6 Ω at
20°C (68°F) between the low reference circuit terminal 4 X2
and the voltage supply circuit terminal 9 X2. |
| ⇒ |
If less than the specified range, test the wiring
harness for internal short. If the circuit test normal, replace the
Q27D Pressure Control Solenoid Valve 4. |
| 3. |
Test for infinite resistance
between each terminal and the low reference circuit terminal 4 X2
and also to the voltage supply circuit terminal 9 X2. |
| ⇒ |
If less than the specified range, replace the
wiring harness. |
| ⇒ |
If the inspection test normal, replace the control
valve body. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|
