The Automatic Transmission changes the gear position of the transmission utilizing a combination of Clutches and Brakes, which are controlled by solenoid valves. This 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 2-4 SOLENOID VALVE 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 & Limp Home
Possible cause
Case 1
DTC
Strategy
Electrical Check
Open or short in circuit
Faulty 2-4 SOLENOID VALVE
Faulty PCM/TCM
Enable
Conditions
PWM DUTY > 25%
Threshold Value
Comparision solenoid operation time with Feed back signal.(Solenoid ON and Short circuit)
Case 2
-
Comparision solenoid operation time with Feed back signal.(Solenoid OFF and Short circuit)
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?
Voltage/Current : 5V, 1.2 A Max.
Internal resistance : 3.5 ± 0.2 O(25?)
Fig 1) Wave form of "PCSV-B(2-4SOLENOID VALVE)"