Inspection Procedure

HINT:

• When U0073/94, U0123/62, U0124/95 or U0126/63 are 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 relating to the steering angle sensor may be output even when the steering angle sensor is normal. When DTCs relating to the speed sensor (C0200/31, C0205/32, C0210/33, C0215/34, C1235/35, C1236/36, C1238/38, C1239/39) or yaw rate (deceleration) sensor (C1232/32, C1234/34, C1243/43, C1244/44, C1245/45, C1381/97) are output together with other DTCs relating to the steering angle sensor, inspect and repair the speed sensor and yaw rate (deceleration) sensor first, and then inspect and repair the steering angle sensor.

1. CHECK CAN COMMUNICATION SYSTEM 
   1. Check for CAN communication system DTCs (See DIAGNOSIS SYSTEM ).

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      DTC not output	A
      DTC output	B

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

   A: Go to next step 

2. CHECK MOMENTARY INTERRUPTION (STEERING ANGLE SENSOR) 
   1. Connect a Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the tester on.
   4. Using the Techstream, check for any momentary interruption in the wire harness and connector corresponding to a DTC.

      Select the following menu items: Chassis / ABS/VSC/ TRAC/ Data List

      DATA LIST: ABS/VSC/TRAC 

      ABS/VSC/TRAC DATA LIST REFERENCE
      
      

      Tester Display	Measurement Item / Range	Normal Condition	Diagnostic Note
      Steering Open	Steering angle sensor open detection : OPN_DET or NORMAL	OPN_DET: Momentary interruption NORMAL: Normal	-

      OK: 

      There are no momentary interruptions. 

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      OK (When troubleshooting in accordance with DTC CHART)	A
      OK (When troubleshooting in accordance with PROBLEM SYMPTOMS TABLE)	B
      NG	C

   B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

   C:  Go to step  4

   A: Go to next step 

3. RECONFIRM DTC 
   1. Clear the DTCs (See DTC CHECK/CLEAR  ).
   2. Check if the same DTCs are recorded (See DTC CHECK/CLEAR  ).

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      DTC output	A
      DTC not output	B

   B: END 

   A: REPLACE MASTER CYLINDER SOLENOID  (See DISASSEMBLY )

4. CHECK TERMINAL VOLTAGE (STEERING ANGLE SENSOR) 
   1. Remove the steering wheel and the column lower cover.
   2. Disconnect the steering angle sensor connector.
   Fig 1: Identifying Steering Angle Sensor Connector Terminals
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Turn the ignition switch to ON.
   4. Measure the voltage.

      Standard voltage 

      VOLTAGE SPECIFICATION
      
      

      Tester Connection	Specified Condition
      E16-1 (IG) - E16-2 (ESS)	11 to 14 V
      E16-9 (BAT) - E16-2 (ESS)	11 to 14 V

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to next step 

5. REPLACE STEERING ANGLE SENSOR 
   1. Replace the steering angle sensor (See REMOVAL  ).
6. RECONFIRM DTC 
   1. Clear the DTCs (See DTC CHECK/CLEAR  ).
   2. Check if the same DTCs are recorded (See DTC CHECK/CLEAR  ).

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      DTC output	A
      DTC not output	B

   B: END 

   A: REPLACE MASTER CYLINDER SOLENOID  (See DISASSEMBLY )