The Speed Sensor receives information on wheel speed and sends it 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 speed sensor reference voltage is lower than specified value.
Item
Detecting Condition
Possible Cause
DTC Strategy
? Speed sensor reference voltage Low
? Power supply malfunction.
? Rear speed sensor,TCCU connector looseness and poor terminal to wire connection.
? Speed sensor circuit open or short to ground.
? 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, Zero speed sensor, EMC Touch off level fixing. 4L Mode fail, EMC Maximum level fixing.