Steering Wheel Angle Sensor installed in steering wheel prevents a state of TCB(Tight Corner Braking) by sensing the rotating direction & straight driving of vehicle and is used for EMC duty control. In case of ESP system applied, 4WD ECM( = TCCU : Transfer Case Control Unit) receives this signal through CAN line. If it is not the case, 4WD ECM receives this signal from Steering Wheel Angle Sensor directly.
※ TCB (Tight Corner Braking) : TCB is that the vehicle makes an abnormal noise and hesistation when the vehicle turns left / right fully with low speed at a paved road.
This code related to Steering Angle Sensor Signal( #1) is set when voltage of signal is above 4.5V or loss of signal is occurred for more than 1sec. In case of ESP system applied, this code is set when can bus off or ecu enternal error is occurred.
If failure is detected 4WD ECM(= TCCU : Transfer Case Control Unit) prohibits the ITM control and cuts the current to control coil.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Signal Monitoring |
•
Steering angle sensor,4WD ECM(TCCU) connector looseness and poor terminal to wire connection.
•
Steering angle sensor circuit open/short.
•
Faulty Steering angle sensor.
•
Faulty 4WD ECM. |
Enable Conditions |
•
IG KEY "ON" , ENGINE "ON " | |
Threshold Value |
•
When the signal voltage from Steering Angle Sensor is higher than 4.5V. | |
Diagnostic Time |
•
1 sec. | |
MIL on condition |
•
0.5 sec. | |
Fail Safe |
•
Prohibiting ITM control |
Fig.1) Steering Wheel Angle Sensor #1,#2
