Advanced Diagnostics

Advanced Diagnostics - DTC P0746: CVT Drive Pulley Pressure Control Solenoid Valve Stuck OFF











General Description
The CVT drive pulley pressure control solenoid valve controls hydraulic pressure to the drive pulley. When the pulley ratio with the vehicle stopped and the throttle closed is overdrive while in D or S, and the estimated input torque when starting is a specified value, but the pulley ratio is not within the pulley ratio range equivalent to the belt slippage, the powertrain control module (PCM) detects a malfunction and stores a DTC.

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






Enable Conditions






Malfunction Threshold
Both conditions must be met.
Judgment of condition B occurs after judgment of condition A happens.

Judgment A
The pulley ratio is 0.3 to 0.8 for at least 2.5 seconds.

Judgment B
The pulley ratio is less than 3 for at least 10 seconds.

Driving Pattern






1. Start the engine, and warm up the engine until the engine coolant temperature reaches 176 °F (80 °C).
2. Shift to D, and keep the brake pedal pressed for 5 seconds.
3. Drive for 15 seconds or more at wide open throttle.
4. Slow down and stop the vehicle, then keep the brake pedal pressed for 5 seconds.
5. Turn the ignition switch to LOCK (0).
6. Repeat Driving Pattern steps 1 through 4.

- Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

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.