Front speed sensor is located in front of propeller shaft. This sensor receives information on wheel speed which it sends to TCCU. TCCU compares the front and rear speed sensor signals and monitors the difference in wheel rotation. This sensor signal is used to decide torque distribution amount for front and rear wheels. By rotating wheel, a Hall-effect wave signal is generated.
This trouble code is set if the Front Speed Sensor voltage(Low) is lower than specified value.
Item
Detecting Condition
Possible Cause
DTC Strategy
? Front speed sensor voltage Low
? Power supply malfunction.
? Front speed sensor,TCCU connector looseness and poor terminal to wire connection.
? Front speed sensor circuit open or short to ground.
? Faulty Front speed sensor.
? Faulty TCCU.
Enable Conditions
? Fault recovers 0.5 sec self clearing
Threshold Value
? <0.3
Diagnostic Time
? 0.5 sec
MIL on condition
? No Flash
Fail Safe
? 4H mode fail, Rear speed sensor, EMC Touch off level fixing. 4L Mode fail, EMC Maximum level fixing