Inspection Procedure

HINT:

When U0073/94, U0123/62, U0124/69 or U0126/63 is output together with C1231/31, inspect and repair the trouble areas indicated by U0073/94, U0123/62, U0124/69 or U0126/63 first.

1. PERFORM INITIALIZATION OF STEERING ANGLE SENSOR 
   1. Check that the steering wheel is in the centered position.
   2. Disconnect the negative battery terminal for more than 2 seconds.
      NOTE: After the ignition switch is turned off, the navigation system requires approximately 90 seconds to record various types of memory and settings. As a result, after turning the ignition switch off, wait 90 seconds or more before disconnecting the cable from the negative (-) battery terminal.
   3. Reconnect the negative battery terminal.
   4. After driving the vehicle straight ahead at 15 km/h (9.3 mph) or more for a few seconds, drive the vehicle at a speed of 45 km/h (28 mph) or more and turn the steering wheel to the right and left for several seconds.
2. READ VALUE USING TECHSTREAM (STEERING ANGLE SENSOR) 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the Techstream ON.
   4. Check that the steering wheel is centered.
   5. Select the Data List mode on the Techstream.
      1. Techstream

         ABS/VSC/TRAC 

         DATA LIST REFERENCE
         
         

         Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
         Steering Angle Sensor	Steering angle sensor / min.: -3276.8°, max.: 3276.7°	Left turn: Increase Right turn: Decrease	-
         Steering Angle Value	Steering angle value / min.: -3276.8°, max.: 3276.7°	Min.: -3276.8° Max.: 3276.7°	-

   6. Check that the steering wheel turning angle of the steering angle sensor changes when turning the steering wheel.

      OK: Turning the steering wheel to the left: Value increases 

      Turning the steering wheel to the right: Value decreases 

   NG:  Go to step  4

   OK: Go to Next Step 

3. RECONFIRM DTC 
   1. Clear the DTC (See DTC CHECK/CLEAR  ).
   2. Start the engine.
   3. After driving the vehicle straight ahead at 15 km/h (9.3 mph) or more for a few seconds, drive the vehicle at a speed of 45 km/h (28 mph) or more and turn the steering wheel to the right and left for several seconds.
   4. Check if the same DTC is recorded (See DTC CHECK/CLEAR  ).

      Result 

      RESULT REFERENCE
      
      

      Result	Proceed to
      DTC is output	A
      DTC is not output	B

   B: CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION)  (See HOW TO PROCEED WITH TROUBLESHOOTING )

   A: REPLACE VSC ACTUATOR ASSEMBLY  (See REMOVAL  )

4. CHECK CAN COMMUNICATION SYSTEM 
   1. Check if the CAN communication system DTC is output (See DIAGNOSIS SYSTEM ).

      Result 

      RESULT REFERENCE
      
      

      Result	Proceed to
      DTC is not output	A
      DTC is output	B

   B: GO TO CAN COMMUNICATION SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )

   A: Go to Next Step 

5. CHECK STEERING ANGLE SENSOR 
   1. Check that the steering angle sensor has been installed correctly (See INSPECTION  ).

      OK: The sensor is installed correctly. 

   NG: INSTALL STEERING ANGLE SENSOR CORRECTLY 

   OK: Go to Next Step 

6. CHECK HARNESS AND CONNECTOR (STEERING ANGLE SENSOR - BATTERY AND BODY GROUND) 
   1. Remove the steering wheel and the column cover lower.
   2. Disconnect the steering angle sensor connector.
   3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      VOLTAGE SPECIFICATION
      
      

      Tester Connection	Switch Condition	Specified Condition
      H6-1 (1G) - Body ground	Ignition switch ON	11 to 14 V
      H6-3 (BAT) - Body ground	Always

   4. Measure the resistance according to the value(s) in the table below.
      Fig 1: Identifying Steering Angle Sensor Connector Terminal

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance 

      RESISTANCE REFERENCE
      
      

      Tester Connection	Condition	Specified Condition
      H6-2 (ESS) - Body ground	Always	Below 1 Ω

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to Next Step 

7. REPLACE STEERING ANGLE SENSOR 
   1. Replace the steering angle sensor (See INSPECTION  ).
8. RECONFIRM DTC 
   1. Clear the DTC (See DTC CHECK/CLEAR  ).
   2. Start the engine.
   3. Drive the vehicle at a speed of 45 km/h (28 mph) or more and turn the steering wheel to the right and left for several seconds.
   4. Check if the same DTC is recorded (See DTC CHECK/CLEAR  ).

      Result 

      RESULT REFERENCE
      
      

      Result	Proceed to
      DTC is output	A
      DTC is not output	B

   B: END 

   A: REPLACE VSC ACTUATOR ASSEMBLY  (See REMOVAL  )