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Home >> Toyota >> 2015 >> Avalon Hybrid Limited >> Repair and Diagnosis >> Brakes >> Traction Control >> Electronically Controlled Brake System - Diagnostic Codes (2 Of 2) & Symptom Tests - (Hybrid) >> Electronically Controlled Brake System >> DTC C1439/66: Steering Angle Sensor Initialization Incomplete; DTC C1445/66: Vehicle Driven with Steering Angle Sensor not Initialized [10/2015 - ] >> Description

DTC C1439/66: Steering Angle Sensor Initialization Incomplete; DTC C1445/66: Vehicle Driven with Steering Angle Sensor not Initialized [10/2015 - ]: Description

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

DTCs C1439/66 and C1445/66 will be cleared when the power switch is turned off.

DTC No. INF Code DTC Detection Condition Trouble Area
C1439/66 752 After the steering angle sensor zero point calibration is cleared due to, for example, fluctuations in the power source, the steering angle sensor zero point calibration cannot be obtained for 0.048 seconds of continuous driving.
  • Steering angle sensor
  • Yaw rate and acceleration sensor (Airbag ECU assembly)
  • Skid control ECU (Brake booster with master cylinder assembly)
C1445/66 753 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 35 km/h (22 mph) or more for 60 seconds or more.
  • Steering angle sensor
  • Yaw rate and acceleration sensor (Airbag ECU assembly)
  • Skid control ECU (Brake booster with master cylinder assembly)