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(=Electric Magnetic Clutch) 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 on a paved road.
This code related to communication line between ECU and 4WD ECM is set when CAN signal from ECU can't received for more than 1sec or ECU internal error occur.
If failure is detected 4WD ECM prohibits the ITM control.
Item
Detecting Condition
Possible Cause
DTC Strategy
SAS-ITM Communication Line, or ECU side malfunction
Poor connection of each unit
Fault of each communication unit
CAN HIGH/LOW circuit open/short.
Faulty SAS
Enable Conditions
IG KEY "ON" , ENGINE "ON "
Threshold Value
When the 4WD ECM doesn't get signals of Steering Angle Sensor or those signals are out of a normal range.
Diagnostic Time
1 sec.
MIL on condition
0.5 sec.
Fail Safe
Prohibiting ITM control
Fig.1) CAN Signal : high & low