Dtc C1434 Steering Angle Sensor Output Malfunction

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC

CHECK TERMINAL VOLTAGE (BAT TERMINAL)

CHECK TERMINAL VOLTAGE (IG TERMINAL)

CHECK HARNESS AND CONNECTOR (ESS TERMINAL)

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

1. Do not remove the steering sensor from the spiral cable.
   
2. When replacing the spiral cable sub-assembly, confirm that the replacement part is of the correct specification.
   
3. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
   

HINT:

1. 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 (YARIS_NCP93 RM000000YUO0EPX.html).
   
2. When the speed sensor or the yaw rate and deceleration sensor (airbag sensor assembly) has trouble, DTCs for the steering angle sensor (spiral cable sub-assembly) may be output even when the steering angle sensor is normal. When DTCs for the speed sensor or yaw rate and deceleration sensor (airbag sensor assembly) are output together with DTCs for the steering angle sensor (spiral cable sub-assembly), inspect and repair the speed sensor and yaw rate and deceleration sensor (airbag sensor assembly) first, and then inspect and repair the steering angle sensor (spiral cable sub-assembly).
   

1. Clear the DTCs (YARIS_NCP93 RM000000XHV0CQX.html).
   

2. Turn the ignition switch off.
   

3. Turn the ignition switch to ON again and check that no CAN communication system DTC is output (YARIS_NCP93 RM000001RSW02LX.html).
   

4. Start the engine.
   

5. Drive the vehicle and turn the steering wheel to the right and left at a speed of 35 km/h (22 mph) and check that no speed sensor or yaw rate and acceleration sensor DTCs are output (YARIS_NCP93 RM000000XHU08YX.html).
   
   

   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

   HINT:

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

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

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   D122-6 (BAT) - Body ground	Always	11 to 14 V

   Text in Illustration

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

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

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

3. Disconnect the steering angle sensor connector.
   

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

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   D122-5 (IG) - Body ground	Ignition switch ON	11 to 14 V

   Text in Illustration

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

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   D122-2 (ESS) - Body ground	Always	Below 1 Ω

   HINT:

   If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (YARIS_NCP93 RM000000XHN0BRX.html)

2. Reconnect the steering angle sensor connector.
   

3. Reinstall the steering wheel and the column cover lower.