2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1997
P2759
DTC P2759 or P2762-P2764
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
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
Typical Scan Tool Data
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
* 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.
* Driving in D range.
* Transmission Control Module (TCM) communication is normal.
* DTCs P2763 and P2764 are not set.
P2762
* The ignition voltage is 10.2-15.5 V.
