DTC C1439: Steering Angle Sensor Initialization Incomplete; DTC C1445: Vehicle Driven with Steering Angle Sensor not Initialized [04/2018 - ]: Description

WARNING: This page is about a different variant/trim than selected.

The skid control ECU (brake booster with master cylinder assembly) acquires the steering angle sensor zero point every time the power switch on (READY) and the vehicle is driven at 35 km/h (22 mph) or more for approximately 5 seconds. The skid control ECU (brake booster with master cylinder assembly) also stores the previous zero point.

If front wheel alignment or the steering wheel position is adjusted without disconnecting the cable from the negative (-) auxiliary battery terminal, or if the yaw rate and acceleration sensor zero point is not acquired after the adjustments have been completed, the skid control ECU (brake booster with master cylinder assembly) detects the difference between the previous zero point and newly acquired zero point and stores this DTC to indicate a poor adjustment.

Warning operation for the steering angle sensor zero point malfunction will be canceled by turning the power switch off.

DTC No.	Detection Item	INF Code	DTC Detection Condition	Trouble Area	MIL	Note
C1439	Steering Angle Sensor Initialization Incomplete	752	The steering angle sensor zero point is lost (due to instability of supplied power, etc.) and cannot be acquired by the skid control ECU (brake booster with master cylinder assembly).	Steering angle sensor Yaw rate sensor (airbag ECU assembly)	Does not come on	VSC DTC
C1445	Vehicle Driven with Steering Angle Sensor not Initialized	753	Steering angle sensor zero point calibration cannot be obtained when the vehicle is driven without a record of steering angle sensor zero point calibration at a speed of 15 km/h (9 mph) or more for 60 seconds or more without the brake pedal being depressed.	Steering angle sensor Yaw rate sensor (airbag ECU assembly)	Does not come on	VSC DTC