Advanced Diagnostics

Advanced Diagnostics - DTC P0796: CVT Start Clutch Pressure Control Solenoid Valve Stuck OFF
















General Description
The CVT clutch pressure control solenoid valve controls and optimizes clutch pressure (hydraulic pressure) for various driving conditions. If the vehicle will not move when opening the throttle to accelerate, and the engine speed and the start clutch target oil pressure increase for a specified time, the powertrain control module (PCM) detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status






Enable Conditions






Malfunction Threshold
The engine speed is greater than the engine speed in graph 2, the oil pressure of the start clutch is at the specified value or more for at least 2 seconds.

Driving Pattern
1. Apply the parking brake, and block all four wheels.
2. Start the engine.
3. With the brake pedal pressed, shift to D.
4. Keep the brake pedal firmly, try to raise the engine speed up to 4,000 rpm.

- If the engine speed is steady under 4,000 rpm (in a normal, it is not over a stall speed), stop the Driving Pattern immediately.

Diagnosis Details

Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC and the freeze data are stored.

Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery.