DTC C1434: Steering Angle Sensor Output Malfunction [11/2016 - ]: Procedure

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [11/2016 - ]

   Chassis > ABS/VSC/TRAC > Clear DTCs 

2. Turn the ignition switch off.
3. Turn the ignition switch to ON again and check that no CAN communication system DTCs are output.

   Refer to DIAGNOSIS SYSTEM [11/2016 - ]

4. Start the engine.
5. 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.

   Refer to DTC CHECK / CLEAR [11/2016 - ]

   Chassis > ABS/VSC/TRAC > Trouble Codes 

   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 DTCs are output simultaneously, repair these malfunctions and then inspect the steering angle sensor.

Result:

B 

INSPECT CAN COMMUNICATION SYSTEM. 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2016 - ]

Result:

C 

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS. 

Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2016 - ]

Result:

A 

Go to next step 

1. Turn the ignition switch off.
2. Check that the steering angle sensor has been installed properly.

   Refer to INSTALLATION [12/2013 - ]

   OK

   The steering angle sensor installation is normal.

Result:

NG 

INSTALL STEERING ANGLE SENSOR CORRECTLY. 

Refer to INSTALLATION [12/2013 - ]

Result:

OK 

Go to next step 

1. Remove the steering wheel and column cover.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

2. Make sure that there is no looseness at the locking part and the connecting part of the connector.
3. Disconnect the F58 steering angle sensor connector.
4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   F58-5 (BAT) - Body ground	Always	11 to 14 V

Result:

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

Result:

OK 

Go to next step 

1. Turn the ignition switch to ON.
2. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   F58-4 (IG1) - Body ground	Ignition switch ON	10.5 to 16 V

   Result	Proceed to
   OK	A
   NG (w/o Stop and Start System)	B
   NG (w/ Stop and Start System)	C

Result:

B 

REPAIR OR REPLACE HARNESS OR CONNECTOR (IG CIRCUIT) 

Result:

C 

INSPECT STOP AND START SYSTEM (BACKUP BOOST CONVERTER CIRCUIT). 

Refer to Backup Boost Converter Circuit [11/2016 - ]

Result:

A 

Go to next step 

1. Turn the ignition switch off.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Before measuring the resistance of the steering angle sensor, turn the ignition 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
   F58-1 (ESS) - Body ground	1 minute after turning ignition 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.

   Refer to PROBLEM SYMPTOMS TABLE [11/2016 - ]

Result:

OK 

REPLACE STEERING ANGLE SENSOR. 

Refer to REMOVAL [12/2013 - ]

Result:

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)