DTC P0748 L61

The powertrain control module (PCM) uses the pressure control (PC) solenoid in order to regulate the transaxle line pressure. The PC solenoid consists of an electrical connector, a coil, an armature, a regulating spring, and a poppet valve. The PC solenoid is attached to the upper control body. The PCM compares TP voltage, engine speed, fluid temperature, gear states, and other inputs in order to determine the line pressure appropriate for a given load. The PCM regulates the pressure by applying a varying current to the PC solenoid. The applied current varies from 0.1 amps for maximum line pressure to 1.1 amps for minimum line pressure. The PCM then monitors the current at the return line.

DTC P0748 will set if PC actual current differs from PC command current by more than 0.16 amps and the following conditions have been met:

P0748 is a type C DTC.

Extended engine cranking with a weak battery could set DTC P0748.

DTC P0748 L81

The transaxle control module (TCM) uses the pressure control (PC) solenoid in order to regulate the transaxle line pressure. The PC solenoid consists of an electrical connector, a coil, an armature, a regulating spring, and a poppet valve. The PC solenoid is attached to the upper control body. The TCM compares TP voltage, engine speed, fluid temperature, gear states, and other inputs in order to determine the line pressure appropriate for a given load. The TCM regulates the pressure by applying a varying current to the PC solenoid. The applied current varies from 0.1 amps for maximum line pressure to 1.1 amps for minimum line pressure. The TCM then monitors the current at the return line. When the TCM detects a continuous open or short to ground in the PC solenoid circuit DTC P0748 sets.

DTC P0748 will set if PC actual current differs from PC command current by more than 0.16 amps and the following conditions have been met:

P0748 is a type C DTC.

Inspect the wiring at the TCM, the transmission connector and the PC solenoid connector for the following conditions: