DTC P2759 or P2762-P2764
| DTC P2759 or P2762-P2764 |
| Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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| DTC Descriptors |
DTC P2759
Torque Converter Clutch (TCC) Pressure Control Solenoid Valve Performance
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 |
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Signal
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P2763
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P2764
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P2764
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P2759, P2762
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Low Reference
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-
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P2759, P2762, P2764
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P2759, P2762, P2764
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P2759, P2762, P2764
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| Typical Scan Tool Data |
TCC Pressure Control Solenoid Valve Current
| Circuit | Short to Ground | Open | Short to Voltage |
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Operating Conditions:
Engine running, normal operating temperature
Parameter Normal Range: 0.1-1.1 A |
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Signal
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0 A
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2.55 A
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2.55 A
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Low Reference
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-
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2.55 A
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1
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1. Internal TCM damage may occur if shorted to B+
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| 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 |
P2759
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The ignition voltage is 10.2-15.5 V.
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The engine speed is greater than 400 RPM for 2 s.
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The transmission is not in emergency mode.
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Driving in D range.
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Transmission control module (TCM) communication is normal.
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DTCs P2763 and P2764 are not set.
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P2762
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The ignition voltage is 10.2-15.5 V.
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The engine speed is greater than 400 RPM for 2 s.
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The transmission is not in emergency mode.
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Driving in D range.
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TCM communication is normal.
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The Automatic Transmission Fluid Temperature is more than 20°C (68°F)
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SLU current is more than 0.85 A.
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SLU current is not changed.
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P2763
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The ignition voltage is 10.2-15.5 V.
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The engine speed is greater than 400 RPM for 2 s.
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The transmission is not in emergency mode.
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Driving in D range.
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TCM communication is normal.
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DTC P2764 is not set.
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P2764
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The ignition voltage is 10.2-15.5 V.
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The engine speed is greater than 400 RPM for 2 s.
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The transmission is not in emergency mode.
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Driving in D range.
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TCM communication is normal.
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DTC P2763 is not set.
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| Conditions for Setting the DTC |
P2759
Deviation between commanded current and feedback currentP2762
The TCM detects the error current more than 80 mA for 2.75 ms.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 1.333 A current consumption of the SLU control circuit for 100 ms.| Action Taken When the DTC Sets |
P2759, P2762
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DTCs P2759 and P2762 are Type B DTCs.
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The TCM turns OFF all solenoids.
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The TCM allows the vehicle after a stop to operate only in the second gear and “R” range.
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P2763, P2764
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DTCs P2763 and P2764 are Type B DTCs.
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No self learning function.
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The TCM turns OFF all solenoids.
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The TCM allows the vehicle after a stop to operate only in the second gear and “R” range.
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| Conditions for Clearing the DTC |
P2759, P2762
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DTCs P2759 and P2762 are Type B DTCs.
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The TCM detects the error current less than 50 mA for 2.75 ms.
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P2763, P2764
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DTCs P2763 and P2764 are Type B DTCs.
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The current consumption of the SLU control circuit is 0.1-1.1 A for 500 ms.
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| 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 under the optimal conditions to test solenoid electrical DTCs.
| Reference Information |
Schematic Reference
Automatic Transmission Controls Schematics
Connector End View Reference
Component Connector End Views
Electrical Information Reference
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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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).
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| 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.
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| 3. |
Observe the scan tool data TCC Pressure Control Solenoid Valve Current parameter. The reading should be between 0.1-1.1 A.
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| 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.
| Component Testing |
Static Test
| 1. |
Ignition OFF, remove the K71 Transmission Control Module.
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| 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.
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| 3. |
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.
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| 4. |
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.
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| 5. |
If less than the specified range, replace the wiring harness.
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| 6. |
If all circuit test normal, perform the control solenoid valve inspection. Refer to
Control Solenoid Valve Inspection (M36 and MXE)
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| 7. |
If the inspection test normal, replace the control valve body.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Control valve body replacement-Refer to
Control Valve Body Replacement
for replacement, setup, and programming.
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TCM-Refer to
Control Module References
for replacement, setup and programming.
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Perform the
Transmission Adaptive Functions
.
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Wiring harness-Refer to
Automatic Transmission Wiring Harness Replacement
for replacement.
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