Vehicle uses 2WD(2 wheel drive) for driving at normal speed, but sometimes it uses 4WD ECM(= TCCU : Transfer Case Control Unit) accordign to driving condition. (cornering or acceleration)
EMC(=Electric Magnetic Clutch) distributes proper torque to front wheel by controling amount of current inside EMC coil.
That time power pressing the multi plate clutch by apply cam is changed by a rate of EMC duty. after multi plate clutch start slip the force for acceletion at front/rear wheel is controlled at a range of 100:0 ~ 50 : 50.
ITM system has 4WD-LOCK function that can make driving force to 50:50 by compulsion according to driver's intention.
If the EMC is rapidly heated by an excessive tire's slip, the 4WD ECM sets this DTC in order to protect the clutch from damage.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Temperature Monitoring |
•
Wheel Speed Sensor
•
Different type of tire or abnormal tire installed
•
Tire excessively worn down
•
Excessive tire's slip |
Enable Conditions |
•
Driving state | |
Threshold Value |
•
When an internal temperature of the EMC exceeds the critical value. | |
Diagnostic Time |
•
1 sec | |
MIL on condition |
•
0.5 Sec. | |
Fail Safe |
•
Prohibiting ITM control |
