BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS VEHICLE STABILITY CONTROL SYSTEM C1434 Steering Angle Sensor Output Malfunction

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 installation abnormality.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1434	Steering Angle Sensor Output Malfunction	Error in communication between the skid control ECU (brake actuator assembly) and the steering angle sensor, or abnormal steering angle sensor zero point.	· Sensor installation · Steering angle sensor power supply · Steering angle sensor

WIRING DIAGRAM

0.833,0.677 1.219,0.865 0.385,0.188 10 false CANL 0.823,1.26 1.25,1.458 0.427,0.198 10 false CANH 0.927,1.938 1.313,2.125 0.385,0.188 10 false BAT 1.052,2.625 1.438,2.813 0.385,0.188 10 false IG 0.917,3.292 1.302,3.479 0.385,0.188 10 false ESS 0.219,3.865 0.615,4.052 0.396,0.188 10 false E115 0.198,4.021 1.833,4.323 1.635,0.302 10 false Steering Angle Sensor 2.917,4.365 4.604,4.573 1.688,0.208 10 false : CAN Communication Line 2.052,2.771 2.969,2.938 0.917,0.167 10 false ECU-IG NO. 1 3.917,1.958 4.75,2.167 0.833,0.208 10 false from Battery 3.906,2.615 5.323,2.823 1.417,0.208 10 false from IG1 NO. 1 Relay 1.281,2.521 1.417,2.688 0.135,0.167 10 false 4 1.281,1.854 1.417,2.021 0.135,0.167 10 false 5 1.281,1.094 1.417,1.281 0.135,0.188 10 false 3 1.281,0.521 1.417,0.688 0.135,0.167 10 false 2 1.281,3.188 1.417,3.354 0.135,0.167 10 false 1 5.792,0.51 6.01,0.677 0.219,0.167 10 false 14 5.781,1.104 6,1.271 0.219,0.167 10 false 25 6.031,0.677 6.417,0.865 0.385,0.188 10 false CANL 6.031,1.271 6.458,1.469 0.427,0.198 10 false CANH 5.583,3.781 5.948,3.979 0.365,0.198 10 false A64 5.583,3.958 7.135,4.323 1.552,0.365 10 false Skid Control ECU (Brake Actuator Assembly) 2.094,2.104 3,2.365 0.906,0.26 10 false ECU-B NO. 1 2.167,2.521 2.302,2.688 0.135,0.167 10 false 2 2.646,2.521 2.771,2.688 0.125,0.167 10 false 1 2.188,1.833 2.344,2.031 0.156,0.198 10 false 2 2.667,1.823 2.823,2.021 0.156,0.198 10 false 1

CAUTION / NOTICE / HINT

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

HINT:: ·

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.

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>VEHICLE STABILITY CONTROL SYSTEM>U0073

·

When a speed sensor, or the yaw rate and acceleration sensor (airbag ECU 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 ECU assembly) are output together with DTCs for the steering angle sensor, inspect and repair the speed sensor or yaw rate and acceleration sensor (airbag ECU assembly) first, and then inspect and repair the steering angle sensor.

PROCEDURE

1.CHECK DTC

Clear the DTCs.

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>VEHICLE STABILITY CONTROL SYSTEM>DTC CHECK / CLEAR

Chassis > ABS/VSC/TRC > Clear DTCs: 50002 105

Turn the engine switch off.

Turn the engine switch on (IG) again and check that no CAN communication system DTCs are output.

Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM>DIAGNOSIS SYSTEM

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 and then check that no speed sensor or yaw rate and acceleration sensor DTCs are output.

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>VEHICLE STABILITY CONTROL SYSTEM>DTC CHECK / CLEAR

Chassis > ABS/VSC/TRC > Trouble Codes: 50001 105

Result:

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

HINT:: ·

If a speed sensor, or the yaw rate and acceleration sensor (airbag ECU 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 DTCs are output simultaneously, repair these malfunctions and then inspect the steering angle sensor.

2.CHECK STEERING ANGLE SENSOR INSTALLATION

INSPECT CAN COMMUNICATION SYSTEM

Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>VEHICLE STABILITY CONTROL SYSTEM>DIAGNOSTIC TROUBLE CODE CHART

2.CHECK STEERING ANGLE SENSOR INSTALLATION

Turn the engine switch off.

Check that the steering angle sensor has been installed properly.

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>STEERING ANGLE SENSOR>INSTALLATION

OK:: The steering angle sensor installation is normal.

Result:

Proceed to
OK
NG

3.CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)

INSTALL STEERING ANGLE SENSOR CORRECTLY

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>STEERING ANGLE SENSOR>INSTALLATION

3.CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)

1.479,0.281 1.885,0.552 0.406,0.271 1.583,1.917 1.854,1.469 true 2.5,1.927 2.146,1.448 true 0.146,0.167 0.458,0.323 0.313,0.156 10 false *a 1.521,0.333 2.135,0.531 0.615,0.198 10 false E115 2.396,1.927 2.813,2.177 0.417,0.25 10 false BAT 1.5,1.927 1.917,2.177 0.417,0.25 10 false IG

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

Remove the steering wheel and column cover.

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

Disconnect the E115 steering angle sensor connector.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
E115-5 (BAT) - Body ground	Always	11 to 14 V
E115-4 (IG) - Body ground	Engine switch on (IG)	11 to 14 V

Result:

Proceed to
OK
NG

4.CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

4.CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)

1.5,0.302 1.906,0.573 0.406,0.271 1.031,1.917 1.302,1.469 true 0.146,0.167 0.458,0.323 0.313,0.156 10 false *a 1.542,0.354 2.156,0.552 0.615,0.198 10 false E115 0.885,1.927 1.302,2.177 0.417,0.25 10 false ESS

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

Turn the engine switch off.

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
E115-1 (ESS) - Body ground	1 minute after turning engine switch off	Below 1 Ω

HINT:: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing parts.; Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>VEHICLE STABILITY CONTROL SYSTEM>PROBLEM SYMPTOMS TABLE

Result:

Proceed to
OK
NG

REPLACE STEERING ANGLE SENSOR

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>STEERING ANGLE SENSOR>REMOVAL

REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)