Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Steering Angle Sensor Failure (C1626)

DESCRIPTION

This DTC is stored if the parking assist ECU receives a signal via CAN communication from the steering sensor that indicates an internal malfunction.
This DTC is stored if the television camera assembly receives a signal via CAN communication from the steering sensor that indicates an internal malfunction.

Parking Assist ECU

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from
C1626	Steering Angle Sensor Failure	A fail flag is transmitted from the steering angle sensor	Steering sensor Parking assist ECU	Parking assist ECU

Television Camera Assembly

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from
C1626	Steering Angle Sensor Failure	A fail flag is transmitted from the steering angle sensor	Steering sensor Television camera assembly	Television camera assembly

CAUTION / NOTICE / HINT

NOTICE:

When "!" is displayed on the radio and display receiver assembly after the cable is disconnected from the negative (-) battery terminal, correct the steering angle neutral point.
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Depending on the parts that are replaced or operations that are performed during vehicle inspection or maintenance, calibration of other systems as well as the panoramic view monitor system may be needed.
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The vehicle is equipped with a Supplemental Restraint System (SRS) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precaution for Supplemental Restraint System.
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PROCEDURE

1.	CHECK FOR DTC

(a) Clear the DTCs.

Chassis > Panoramic View Monitor > Clear DTCs Chassis > Parking Assist Camera > Clear DTCs

(b) Recheck for DTCs and check that no DTCs are output.

Chassis > Panoramic View Monitor > Trouble Codes Chassis > Parking Assist Camera > Trouble Codes

Result	Proceed to
DTC C1626 is output	A
DTC C1626 is not output	B

USE SIMULATION METHOD TO CHECK

2.	REPLACE STEERING SENSOR

(a) Replace the steering sensor with a normally functioning one.

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3.	CHECK FOR DTC

(a) Clear the DTCs.

Chassis > Panoramic View Monitor > Clear DTCs Chassis > Parking Assist Camera > Clear DTCs

(b) Check for DTCs.

Chassis > Panoramic View Monitor > Trouble Codes Chassis > Parking Assist Camera > Trouble Codes

Result	Proceed to
No DTCs are output	A
DTC C1626 is output ("Panoramic View Monitor")	B
DTC C1626 is output ("Parking Assist Camera")	C

END (STEERING SENSOR WAS DEFECTIVE)

REPLACE PARKING ASSIST ECU

REPLACE TELEVISION CAMERA ASSEMBLY

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Smart Key System(for Start Function, Gasoline Model): Short to GND in Immobiliser System Power Source Circuit (B278A)
DESCRIPTION When there is a short to GND in the power supply for the transponder key amplifier of the engine switch, the certification ECU (smart key ECU assembly) stores this DTC. DTC No. Detection Item DTC Detection Condition Trouble Area Note B278A Short to GND in Immobiliser System Power Source ...

Toyota Avalon (XX50) 2019-2022 Owners Manual