Inspection Procedure

HINT:

• When U0073/94, U0123/62, U0124/95 or U0126/63 is output together with C1231/31, inspect and repair the trouble areas indicated by U0073/94, U0123/62, U0124/95 or U0126/63 first.
• When the speed sensor or the yaw rate sensor has trouble, DTCs for the steering angle sensor may be output even when the steering angle sensor is normal. When DTCs for the speed sensor (C0200/31, C0205/32, C0210/33, C0215/34, C1235/35, C1236/36, C1238/38, C1239/39) or yaw rate and acceleration sensor (C1232/32, C1234/34, C1243/43, C1244/44, C1245/45, C1381/81) are output together with other DTCs for the steering angle sensor, inspect and repair the speed sensor and yaw rate sensor first, and then inspect and repair the steering angle sensor.

1. INSPECT STEERING ANGLE SENSOR (POWER SOURCE TERMINAL) 
   1. Remove the steering wheel and the column lower cover.
   2. Disconnect the steering angle sensor connector.
   3. Turn the ignition switch to the ON position.
   4. Measure the voltage according to the value (s) in the table below.

      Standard voltage 

      VOLTAGE SPECIFIED CONDITION
      
      

      Tester Connection	Condition	Specified Condition
      S12-1 (IG1) - S12-2 (ESS)	Ignition switch ON	10 to 14 V

   5. Measure the voltage according to the value (s) in the table below.
      Fig 1: Identifying Voltage Between Steering Angle Sensor Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      VOLTAGE SPECIFIED CONDITION
      
      

      Tester Connection	Condition	Specified Condition
      S12-3 (BAT) - S12-2 (ESS)	Ignition switch ON	10 to 14 V

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

   OK: REPLACE STEERING ANGLE SENSOR