DESCRIPTION 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.
PROCEDURE
(a) Clear the DTCs. Click here Chassis > ABS/VSC/TRAC > Clear DTCs(b) Turn the power switch off. (c) Turn the power switch on (IG) again and check that no CAN communication system DTC is output. Click here (d) Turn the power switch on (READY). (e) Drive the vehicle at a speed of 35 km/h (22 mph), turn the steering wheel to the right and left, and check that no speed sensor and/or yaw rate and acceleration sensor DTCs are output. Click here Chassis > ABS/VSC/TRAC > Trouble CodesHINT:
(a) Drive the vehicle straight ahead at 35 km/h (22 mph) or more for at least 5 seconds. (b) Check that the centered position of the steering wheel is correctly set while driving straight ahead. OK: The steering wheel is centered correctly. HINT: If the front wheel alignment and steering position are adjusted as a result of an off-center steering wheel, acquire the yaw rate and acceleration sensor zero point again after the adjustments are completed.
(a) Clear the DTCs. Click here Chassis > ABS/VSC/TRAC > Clear DTCs(b) Turn the power switch off. (c) Turn the power switch on (READY). (d) Drive the vehicle at a speed of 35 km/h (22 mph) or more and turn the steering wheel to the right and left. (e) Check if the same DTC is output. Click here Chassis > ABS/VSC/TRAC > Trouble Codes
HINT: If DTCs C1439 and/or C1445 are 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 source voltage drops.
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Camshaft Position Sensor: Removal
REMOVAL CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during VVT sensor removal/installation are shown below. Necessary Procedures After Parts Removed/Installed/Repl ...