Component Location
General Description
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 ).
DTC Description
The PCM/TCM checks the OD Clutch & LR Brake 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 OD & LR Brake contorl solenoid circuit is malfunctioning and sets this code.
DTC Detecting Condition
Item | Detecting Condition | Possible Cause |
DTC Strategy | Check voltage range
| Open or short in circuit
Faulty UD 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.
|
Specification
Solenoid Valve for Pressure Control
- Sensor type : Normal open 3-way
- Operating temperature : -30°C~130°C
- Frequency :PCSV-A,B,C,D :50Hz (at the ATF temp. -20°C above)
VFS : 400~1000
? KM series : 35Hz
- Internal resistance : 3.5 ± 0.2 ?(20°C)
- Surge voltage : 56 V
Schematic Diagram
Signal Waveform
Fig 1) Waveform in 1st(Brake ON),3rd and 4th gear
Fig 2) Waveform in 1st (Brake OFF) and 2nd gear