DTC C1439: Steering Angle Sensor Initialization Incomplete; DTC C1445: Vehicle Driven with Steering Angle Sensor not Initialized [08/2015 - 08/2019]: Procedure

1. Clear the DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).
2. Turn the ignition switch off.
3. Turn the ignition switch to ON again and check that no CAN communication system DTC is output.
4. Drive the vehicle at a speed of 40 km/h (25 mph) and turn the steering wheel to the right and left, and then check that no speed sensor and yaw rate and acceleration sensor DTCs are output (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).
   RESULT
   
   

   Result		Proceed to
   DTC is output	C1439 and/or C1445	A
   	Relating to CAN communication system	B
   	Relating to speed sensor or yaw rate and acceleration sensor	C
   DTC is not output		D

   HINT: 

   • If there is a malfunction in the speed sensor or the yaw rate and acceleration sensor, an abnormal value may be output although the steering angle sensor (spiral with sensor cable sub-assembly) is normal.
   • If the speed sensor and the yaw rate and acceleration sensor DTCs are output simultaneously, repair the sensors and inspect the steering angle sensor (spiral with sensor cable sub-assembly).
   • If DTC C1439 and/or C1445 is not output again, the DTC may have been stored due to a temporary loss of the steering angle zero point calibration, such as when the power voltage drops.

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] )

Result: 

C 

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 

(Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2015 - 08/2019] )

Result: 

D 

USE SIMULATION METHOD TO CHECK 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] )

Result: 

A 

See step  2

1. Drive the vehicle straight ahead at 40 km/h (25 mph) or more for at least 10 seconds.
2. Check that the centered position of the steering wheel is correctly set while driving straight ahead.

   HINT: 

   If the front wheel alignment and steering position are adjusted as a result of an abnormal centered position of the steering wheel, acquire the yaw rate and acceleration sensor zero point again after the adjustments are completed.

   OK

   The centered position of the steering wheel is correctly set.

Result: 

NG 

ADJUST FRONT WHEEL ALIGNMENT OR STEERING POSITION 

(Refer to ADJUSTMENT [08/2015 - 12/2016] , or refer to ADJUSTMENT [12/2016 - ] )

Result: 

OK 

See step  3

1. Clear the DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).
2. Turn the ignition switch off.
3. Start the engine.
4. Drive the vehicle at a speed of 40 km/h (25 mph) or more and turn the steering wheel to the right and left.
5. Check if the same DTC is output (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).
   RESULT
   
   

   Result	Proceed to
   DTCs C1439 and C1445 are not output	A
   Yaw rate and acceleration sensor and/or steering angle sensor DTC is output	B

   HINT: 

   If DTC C1439 and/or C1445 is not output again, the DTC may have been stored due to a temporary loss of the steering angle zero point calibration, such as when the power voltage drops.

Result: 

A 

END 

Result: 

B 

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 

(Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2015 - 08/2019] )