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. 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 ).
DTC Description
The PCM/TCM checks the Over Drive Clutch Control/Low & Reverse Brake 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 Under Drive Clutch contorl solenoid circuit is malfunctioning and sets this code.
DTC Detecting Condition
Item | Detecting Condition | Possible Cause |
Case 1 | DTC Strategy | Electrical Check
| Open or short in circuit
Faulty OD/LR 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 | DTC Strategy | -
|
Enable Conditions | 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.
|
Specification
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 O(20?) |
Surge voltage : 56 V |
Diagnostic Circuit Diagram
Signal Waveform
Fig 1) Wave form of "OD/LR(SCSV-A)" in 2nd gear