General Information

P0748 Pressure Control Solenoid Valve (VFS) \'A\' Electrical

General Information

Component Location





General Description

Variable Forced Solenoid (Linear Solenoid) : The amount of oil flow is determined by current signal for maintaining constant line pressure. The amount is decided by how widely spool valve open the passage of going through.

DTC Description

The TCM checks the VFS Control Signal by monitoring the feedback signal from the solenoid valve drive circuit. If an unexpected signal is monitored (for example, high voltage is detected when low voltage is expected, or low voltage is detected when high voltage is expected), the TCM judges that the Low and Reverse control solenoid circuit is malfunctioning and sets this code.

DTC Detecting Condition





Specification

Solenoid Valve for Pressure Control
- Sensor type : Normal open 3-way
- Operating temperature : -30°C~130°C
- Voltage/Current : 5 V, 1.2 A Max.
- Internal resistance : 3.5 ± 0.2 Ohms (20°C)

Diagnostic Circuit Diagram










Signal Waveform & Data




Fig 1) Wave form of "VFS".