DTC C1439: Steering Angle Sensor Initialization Incomplete; DTC C1445: Vehicle Driven with Steering Angle Sensor not Initialized [12/2017 - 09/2018]: Procedure

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [12/2017 - 09/2018]

   Chassis > ABS/VSC/TRAC > Clear DTCs 

2. Turn the engine switch off.
3. Turn the engine switch on (IG) again and check that no CAN communication system DTCs are output.

   Refer to DIAGNOSIS SYSTEM [12/2017 - 09/2018]

4. Start the engine.
5. Drive the vehicle at a speed of 35 km/h (22 mph) or more and turn the steering wheel to the right and left and check that no speed sensor or acceleration sensor (yaw rate sensor) DTCs are output.

   Refer to DTC CHECK / CLEAR [12/2017 - 09/2018]

   Chassis > ABS/VSC/TRAC > Trouble Codes 

   HINT: 

   • If a speed sensor or the acceleration sensor (yaw rate sensor) is malfunctioning, DTCs for the steering sensor may be stored even though the steering sensor is normal.
   • If speed sensor and acceleration sensor (yaw rate sensor) DTCs are output simultaneously, repair these malfunctions and then inspect the steering sensor.
   • If DTC C1439 and/or C1445 is not output again, the DTC may have been stored due to a temporary loss of steering sensor zero point calibration, such as a loss of calibration due to the power source voltage being low.

   Result

   Result	Proceed to
   DTCs C1439 and/or C1445 are output.	A
   CAN communication system DTCs are output.	B
   Speed sensor, acceleration sensor (yaw rate sensor) and/or steering sensor DTCs are output.	C
   DTCs C1439 and C1445 are not output.	D

Result: 

B 

INSPECT CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2017 - 09/2018] 

Result: 

C 

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS. Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2017 - 09/2018] 

Result: 

D 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2017 - 09/2018] 

Result: 

A 

See step  2

1. Drive the vehicle straight ahead at 35 km/h (22 mph) or more for at least 5 seconds.
2. Check that the steering wheel is correctly centered while driving straight ahead.

   HINT: 

   If front wheel alignment and steering are adjusted as a result of an off-center steering wheel, acquire the acceleration sensor (yaw rate sensor) zero point again after the adjustments are completed.

   OK

   The centered position of the steering wheel is correctly set.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

ADJUST FRONT WHEEL ALIGNMENT OR STEERING 

for AWD: Refer to ADJUSTMENT [12/2017 - 09/2018]

for 2WD: Refer to ADJUSTMENT [12/2017 - 09/2018]

Result: 

OK 

See step  3

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [12/2017 - 09/2018]

   Chassis > ABS/VSC/TRAC > Clear DTCs 

2. Turn the engine switch off.
3. Start the engine.
4. Drive the vehicle at a speed of 35 km/h (22 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 [12/2017 - 09/2018]

   Chassis > ABS/VSC/TRAC > Trouble Codes 

   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 sensor zero point calibration, such as a loss of calibration due to the power source voltage being low.

   Result

   Result	Proceed to
   DTCs C1439 and C1445 are not output.	A
   Acceleration sensor (yaw rate sensor) and/or steering angle sensor (spiral cable with sensor sub-assembly) DTCs are output.	B

Result: 

A 

END 

Result: 

B 

REPLACE CIRCUITS INDICATED BY OUTPUT DTCS. Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2017 - 09/2018]