Variable Foced Solenoid (Linear Solenoid) : With the duty control which uses higher frequency(600Hz), instead of the existing PWM type which adapts low frequency(60Hz) to control,spool valve can be conrolled precisely.
In PWM control,the amount of oil flow is determined by the duration of "ON"signal among continuously repeated ON/OFF signals.
In VFS, the amount is decided by how widely spool valve open the passage of going through.
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.
Item | Detecting Condition | Possible Cause |
DTC Strategy | ● Check voltage range | ● Open or short in circuit ● Faulty VF SOLENOID VALVE ● Faulty PCM/TCM |
Enable Conditions | ● 16V > Voltage Battery >10V ● Engine run time ≥ 0.5sec ● A/T Relay = ON ● Not on shifting | |
Threshold Value | ● Out of available voltage range | |
Diagnostic Time | ● More than 5seconds | |
Fail Safe | ● Locked in 3 rd gear.(Control relay off) |
Solenoid Valve for Pressure Control
- Sensor type : Normal open 3-way
- Operating temperature : -22~266℉(-30℃∼130℃)
- Frequency : LR, 2ND, UD, OD, RED : 61.27Hz (at the ATF temp. -20℃ above)
DCC : 30.64Hz
※ KM series : 35Hz
- Internal resistance : 2.7~3.4Ω(68℉ or 20℃)
- Surge voltage : 56 V
