Circuit/System Description

The line pressure control solenoid regulates the transmission fluid line pressure. The hybrid/EV powertrain control module 1 varies the current to the normally high line pressure control solenoid valve from 0.1 amp for maximum line pressure, to 1.1 amps for minimum line pressure. This is accomplished by varying the current in order to obtain the desired line pressure in kPa (psi). The hybrid/EV powertrain control module 1 is part of the drive motor generator power inverter module and is not serviced separately.