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 ), 2ND ( 2nd Brake ), UD ( Under Drive Clutch ), OD ( Over Drive Clutch ), REV ( Reverse Clutch ), and RED ( Reduction Brake, only for 5 speed transmissions). The OD Clutch is engaged in the 3rd gear and 4th gear positions.
DTC Description
The 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 TCM judges that the OVER DRIVE CLUTCH drive control solenoid circuit is malfunctioning and sets this code.
DTC Detecting Condition
Item | Detecting Condition | Possible Cause |
CASE1 | DTC Strategy | ? Check voltage range | ? Open or short in circuit ? Faulty OD SOLENOID VALVE ? Faulty PCM/TCM |
Enable Conditions | ? 16V > Voltage Battery >10V |
Threshold Value | ? Feedback voltage from 2nd control solenoide>vb-2V and 2nd control duty is 0% ? Feedback voltage from 2nd control solenoide=5.5V and 2nd control duty is 100% |
Diagnostic Time | ? More than 320 ms |
Fail Safe | ? Locked in 3 rd gear.(Control relay off) |
CASE2 | DTC Strategy | ? Check voltage range |
Enable Conditions | ? Voltage Battery >10V ? OIL TEMP. = -23.5? ? 2nd gear and not under the down shifting ? Ne = 450rpm ? No > 100rpm ? Nt > 0rpm ? Inhibitor switch is normal and after 2sec is passed from IG ON |
Threshold Value | ??input speed/3rd gear ratio - output speed ?= 50rpm |
Diagnostic Time | ? More than 320 ms |
Fail Safe | ? Locked in 3 rd gear.(Control relay off) |
Specification
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 : 2.7~3.4O(20?)
- Surge voltage : 56 V
Schematic Diagram