The Automatic Transmission changes the gear position of the transmission utilizing a combination of Clutches and Brakes, which are controlled by solenoid valves. The HIVEC Automatic Transmission consists of a: LR ( Low and Reverse Brake ), 2-4( 2-4 Brake ), UD ( Under Drive Clutch ), OD ( Over Drive Clutch ), REV ( Reverse Clutch ).
The PCM/TCM checks the Under Drive Clutch 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 PCM/TCM judges that 2nd Brake drive contorl solenoid circuit is malfunctioning and sets this code.
Item | Detecting Condition | Possible Cause |
DTC Strategy | ● Check voltage range | ● Open or short in circuit ● Faulty 2-4 SOLENOID VALVE ● Faulty PCM/TCM |
Enable Conditions | ● 16V > Actuator(TCU) power supply voltage >10V | |
Threshold Value | ● Circuit open or short to ground | |
Diagnostic Time | ● More than 1sec | |
Fail Safe | ● Locked in 3 rd gear. |
Solenoid Valve for Pressure Control
- Sensor type : Normal open 3-way
- Operating temperature : -30℃∼130℃
- Frequency :PCSV-A,B,C,D :50Hz (at the ATF temp. -20℃ above)
VFS : 400~1000
※ KM series : 35Hz
- Internal resistance : 3.5 ± 0.2 Ω(20℃)
- Surge voltage : 56 V
