Wheel Speed Sensor senses vehicle speed and difference between front and rear wheel speed.
Opreation for getting Rotating Speeds of front/rear wheel can be got from deviding wheel speed sensor Rotating Speeds of front/rear by 2.
In case of ESP(or FTCS) system applied 4WD ECU receives this signal through CAN line, If it is not the case 4WD ECU receives this signal directly by using PWM communication line.
The wheel speed sensor is the essential component the ITM ECU uses to determine how to distribute driving force to front / rear wheel with steering angle sensor signal and TPS, brake signal.
This code related to communication line between ECU and TCCU is set when CAN signal from ECU can’t received for more than 1sec or ECU internal error occur.
If failure is detected TCCU prohibits the ITM control and cuts the current to control coil.
Item
Detecting Condition
Possible Cause
DTC Strategy
? Loss of signal
? ABS MODULE,TCCU connector looseness and poor terminal to wire connection.
? Wheel sensor comm line circuit open/short.
? Faulty Wheel sensor .
? Faulty ABS MODULE .
? Faulty TCCU .
Enable Conditions
? Message present 1.0 sec self clearing
Threshold Value
? Measure individual wheel, if speed difference is 30kph for 30 seconds fault code will be set.ignition cycle reset
Diagnostic Time
? 1 sec
MIL on condition
? 0.5 Sec.
Fail Safe
? Speed sensor error will turn ITM off. ITM will not have output