BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model): C1434; Steering Angle Sensor Output; 2019 - 2021 MY Avalon [04/2018

Last Modified: 08-21-2023	6.11:8.1.0	Doc ID: RM100000001AZ97
Model Year Start: 2019	Model: Avalon	Prod Date Range: [04/2018 - 08/2021]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model): C1434; Steering Angle Sensor Output; 2019 - 2021 MY Avalon [04/2018 - 08/2021]

DTC

C1434

Steering Angle Sensor Output

DESCRIPTION

The skid control ECU (brake actuator assembly) receives signals from the steering angle sensor via CAN communication.

HINT:

If there is a malfunction in the bus lines between the steering angle sensor and the CAN communication system, DTC U0126 (Lost Communication With Steering Angle Sensor Module) is output. When U0126 is output together with C1434, inspect and repair the trouble areas indicated by U0126 first.

DTCs may be stored if one of the following occurs:

Steering angle sensor zero point value malfunction.
Steering angle sensor signal malfunction.
Steering angle sensor signal stuck malfunction.
Steering angle sensor and the yaw rate sensor values inconsistent.
Steering angle sensor installation abnormality.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1434	Steering Angle Sensor Output	Any of the following is detected: The difference between the zero point of the steering angle sensor and the estimated zero point exceeds 15 deg. The offset value of the steering angle sensor is -13.5 deg. or less or 13.5 deg. or more. The steering angle sensor value exceeds a specified value for 0.3 seconds or more. The change of the steering angle sensor value within 0.02 seconds is abnormal. The steering angle sensor value changes by less than 5 deg. and both left and right turns have been recognized. There is a difference between the skid control ECU (brake actuator assembly) estimated value and the steering angle sensor value due to an abnormal steering angle sensor value.	Steering angle sensor installation Steering angle sensor power supply Steering angle sensor Skid control ECU (brake actuator assembly)

DTC Detection Conditions: C1434

		Vehicle Condition
		Pattern 1	Pattern 2	Pattern 3	Pattern 4	Pattern 5	Pattern 6
Diagnosis Condition	The steering angle sensor value changes by less than 5 deg.	-	-	-	-	○	-
Malfunction Status	The difference between the zero point of the steering angle sensor and the estimated zero point exceeds 15 deg.	○	-	-	-	-	-
	The offset value of the steering angle sensor is -13.5 deg. or less or 13.5 deg. or more.	-	○	-	-	-	-
	The steering angle sensor value exceeds a specified value.	-	-	○	-	-	-
	The change of the steering angle sensor value within 0.02 seconds is abnormal.	-	-	-	○	-	-
	Both left and right turns have been recognized.	-	-	-	-	○	-
	There is a difference between the skid control ECU (brake actuator assembly) estimated value and the steering angle sensor value due to an abnormal steering angle sensor value.	-	-	-	-	-	○
Detection Time		-	-	0.3 seconds or more	-	-	-
Number of Trips		1 trip	1 trip	1 trip	1 trip	1 trip	1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

WIRING DIAGRAM

Refer to DTC C1231.

Click here

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

HINT:

When U0073, U0123 and/or U0126 is output together with C1434, inspect and repair the trouble areas indicated by U0073, U0123 and/or U0126 first.
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When a speed sensor or the yaw rate and acceleration sensor (airbag sensor assembly) is malfunctioning, DTCs for the steering angle sensor may be stored even though the steering angle sensor is normal. When DTCs for a speed sensor or yaw rate and acceleration sensor (airbag sensor assembly) are output together with DTCs for the steering angle sensor, inspect and repair the speed sensor or yaw rate and acceleration sensor (airbag sensor assembly) first, and then inspect and repair the steering angle sensor.

PROCEDURE

CHECK DTC

(a) Clear the DTCs.

Chassis > ABS/VSC/TRAC/EPB > Clear DTCs

(b) Turn the engine switch off.

Click here

(d) Start the engine.

(e) Drive the vehicle at a speed of 50 km/h (31 mph) and turn the steering wheel to the right and left and then check that no speed sensor or yaw rate and acceleration sensor (airbag sensor assembly) DTCs are output.

Chassis > ABS/VSC/TRAC/EPB > Trouble Codes

Result	Proceed to
No CAN communication system, speed sensor, or yaw rate and acceleration sensor (airbag sensor assembly) DTCs are output	A
CAN communication system DTCs are output	B
Speed sensor and/or yaw rate and acceleration sensor (airbag sensor assembly) DTCs are output	C

HINT:

If a speed sensor or the yaw rate and acceleration sensor (airbag sensor assembly) is malfunctioning, DTCs for the steering angle sensor may be stored even though the steering angle sensor is normal.
If speed sensor and yaw rate and acceleration sensor (airbag sensor assembly) DTCs are output simultaneously, repair these malfunctions and then inspect the steering angle sensor.

INSPECT CAN COMMUNICATION SYSTEM

REPAIR CIRCUIT INDICATED BY OUTPUT DTC

2.	CHECK STEERING ANGLE SENSOR INSTALLATION

(a) Turn the engine switch off.

(b) Check that the steering angle sensor has been installed properly.

Click here

OK:

The steering angle sensor installation is normal.

INSTALL STEERING ANGLE SENSOR CORRECTLY

3.	CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)

(a) Remove the steering wheel and column cover.

*a	Front view of wire harness connector (to Steering Angle Sensor)

(b) Make sure that there is no looseness at the locking part and the connecting part of the connector.

OK:

The connector is securely connected.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(e) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
G48-4 (BAT) - Body ground	Always	11 to 14 V
G48-9 (IG1) - Body ground	Engine switch on (IG)	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

4.	CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)

(a) Turn the engine switch off.

*a	Front view of wire harness connector (to Steering Angle Sensor)

(b) Measure the resistance according to the value(s) in the table below.

NOTICE:

Before measuring the resistance of the steering angle sensor, turn the engine switch off and leave the vehicle for 1 minute or more without operating the key or switches, or opening or closing the doors.

Standard Resistance:

Tester Connection	Condition	Specified Condition
G48-6 (ESS) - Body ground	1 minute after engine switch off	Below 1 Ω

REPLACE STEERING ANGLE SENSOR

REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)