DTC C1434: Steering Angle Sensor Output [11/2017 - 03/2019]: Procedure

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [11/2017 - 03/2019]

   Chassis > ABS/VSC/TRAC > Clear DTCs 

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

   Refer to DIAGNOSIS SYSTEM [11/2017 - 03/2019]

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 [11/2017 - 03/2019]

   Chassis > ABS/VSC/TRAC > Trouble Codes 

   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 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 [11/2017 - 03/2019] 

Result: 

C 

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS. Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2017 - 03/2019] 

Result: 

A 

See step  2

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

   Refer to INSTALLATION [09/2014 - ]

   OK

   The steering angle sensor installation is normal.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

INSTALL STEERING ANGLE SENSOR CORRECTLY. Refer to  INSTALLATION [09/2014 - ] 

Result: 

OK 

See step  3

1. Remove the steering wheel and the column cover lower.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Refer to REMOVAL [09/2014 - 03/2019]

2. Make sure that there is no looseness at the locking part and the connecting part of the connector.
3. Disconnect the O28 steering angle sensor connector.
4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   O28-8 (BAT) - Body ground	Always	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (BAT CIRCUIT) 

Result: 

OK 

See step  4

1. Turn the engine switch on (IG).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   O28-4 (IG1) - Body ground	Engine switch on (IG)	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT) 

Result: 

OK 

See step  5

1. Turn the engine 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 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
   O28-1 (ESS) - Body ground	1 minute after engine switch off	Below 1 Ω

   Result

   Proceed to
   OK
   NG

   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 [11/2017 - 03/2019]

Result: 

OK 

REPLACE STEERING ANGLE SENSOR. Refer to  REMOVAL [09/2014 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (ESS CIRCUIT)