VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1434

DTC Code	DTC Name
C1434	Steering Angle Sensor Output Malfunction

DESCRIPTION

Steering angle sensor signals are input to the skid control ECU (brake actuator assembly) via the CAN communication system.

Tech Tips

When a malfunction occurs in the communication line to the steering angle sensor, U0126 is output.

If a DTC related to the CAN communication line is output, first troubleshoot the CAN communication line.

DTCs may be stored if one of the following occurs:

Steering angle sensor zero point malfunction
Steering angle sensor signal malfunction
Steering angle sensor installation abnormality.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
C1434	Steering Angle Sensor Output Malfunction	Normal communication between the skid control ECU and the steering angle sensor and abnormal steering angle sensor zero point.	Sensor installation Steering angle sensor Wire harness or connector Backup boost converter circuit Skid control ECU (brake actuator assembly)	-

WIRING DIAGRAM

Refer to DTC C1432.

Click here

CAUTION / NOTICE / HINT

Note

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

Tech Tips

When U0073, U0124 and/or U0126 is output together with C1434, inspect and repair the trouble areas indicated by U0073, U0124 and/or U0126 first.

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When any of the speed sensors or the yaw rate and acceleration sensor (airbag ECU assembly) has trouble, DTCs for the steering angle sensor may be output even when the steering angle sensor is normal. When DTCs for the speed sensors or yaw rate and acceleration sensor (airbag ECU assembly) are output together with DTCs for the steering angle sensor, inspect and repair the speed sensor and yaw rate and acceleration sensor (airbag ECU assembly) first, and then inspect and repair the steering angle sensor.

PROCEDURE

CHECK DTC

Clear the DTCs.

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Chassis > ABS/VSC/TRC > Clear DTCs
Turn the engine switch off.
Turn the engine switch on (IG) again and check that no CAN communication system DTC is output.

for LHD: Click here

for RHD: Click here
Start the engine.

Drive the vehicle at a speed of 35 km/h (22 mph) and turn the steering wheel to the right and left to check that no speed sensor or yaw rate and acceleration sensor DTCs are output.

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Chassis > ABS/VSC/TRC > Trouble Codes

Tech Tips

If there is a malfunction in any of the speed sensors or the yaw rate and acceleration sensor (airbag ECU assembly), an abnormal value may be output although the steering angle sensor is normal.
If speed sensor and yaw rate and acceleration sensor (airbag ECU assembly) DTCs are output simultaneously, repair these two sensors first and inspect the steering angle sensor.

Result

Result	Proceed to
No CAN communication system, speed sensor, or yaw rate and acceleration sensor DTCs are output.	A
CAN communication system DTC is output.	B
Speed sensor or yaw rate and acceleration sensor DTC is output.	C

CHECK CAN COMMUNICATION SYSTEM for LHD: Click here
CHECK CAN COMMUNICATION SYSTEM for RHD: Click here

REPAIR CIRCUIT INDICATED BY OUTPUT DTC Click here

CHECK STEERING ANGLE SENSOR INSTALLATION

Turn the engine switch off.

Check that the steering angle sensor has been installed properly.

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OK
The steering angle sensor installation is normal.

Result

Proceed to
OK
NG

INSTALL STEERING ANGLE SENSOR CORRECTLY Click here

CHECK TERMINAL VOLTAGE (BAT TERMINAL)

Remove the steering wheel and the column cover lower.

Click here
*a
Front view of wire harness connector

(to Steering Angle Sensor)

Make sure that there is no looseness at the locking part and the connecting part of the connectors.

Note

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.
Disconnect the G12 steering angle sensor connector.

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

Standard Voltage

Tester Connection	Condition	Specified Condition
G12-5 (BAT) - Body ground	1 minute after engine switch off	11 to 14 V

Result

Proceed to
OK
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (BAT CIRCUIT)

CHECK TERMINAL VOLTAGE (IG TERMINAL)

Turn the engine switch on (IG).

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

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

Standard Voltage

Tester Connection	Condition	Specified Condition
G12-4 (IG) - Body ground	Engine switch on (IG)	10.5 to 16 V

Result

Proceed to
OK
NG

INSPECT STOP AND START SYSTEM (BACKUP BOOST CONVERTER CIRCUIT) for 2AR-FE: Click here
INSPECT STOP AND START SYSTEM (BACKUP BOOST CONVERTER CIRCUIT) for 2GR-FKS: Click here

CHECK HARNESS AND CONNECTOR (ESS TERMINAL)

Turn the engine switch off.

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

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

Note

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
G12-1 (ESS) - Body ground	1 minute after turning engine switch off	Below 1 Ω

Tech Tips

If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step.

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Result

Proceed to
OK
NG

REPLACE STEERING ANGLE SENSOR Click here

REPAIR OR REPLACE HARNESS OR CONNECTOR (ESS CIRCUIT)