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 of the steering sensor may be output even when the steering sensor is normal. When DTCs of 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 of the steering angle sensor, inspect and repair the speed sensor and yaw rate sensor first, and then inspect and repair the steering sensor.

1. Check CAN communication system. 

   CHECK: 

   Check CAN communication system DTC (see DTC CHECK / CLEAR  ).

   RESULT: 

   DTC OUTPUT RESULT
   
   

   DTC is not output	A
   DTC is output	B

   1. B: Repair CAN communication system according to the output code (See  DIAGNOSTIC TROUBLE CODE CHART  ). 
   2. A: Go to next step. 
2. Check steering angle sensor operation. 

   PREPARATION: 

   1. Connect the hand-held tester to the DLC3.
   2. Turn the ignition switch to the ON position.
   3. Select DATA LIST mode on the hand-held tester.
   DATA LIST REFERENCE
   
   

   Item	Measurement Item/Range (Display)	Normal Condition	Diagnostic Note
   STEERING ANG	Steering angle sensor/min.: - 1152 deg., max.: 1150.875 deg	Left turn: Increase Right turn: Decrease	-

   CHECK: 

   Check that the steering wheel turning angle value of the steering angle sensor displayed on the hand-held tester changes when turning the steering wheel.

   OK: 

   Steering angle value changes. 

   1. NG: Go to step   4 . 
   2. OK: Go to next step. 
3. Reconfirm DTC (See  DTC CHECK / CLEAR   ). 

   PREPARATION: 

   Clear the DTCs.

   CHECK: 

   Check if the same DTCs are detected.

   RESULT: 

   DTC OUTPUT RESULT
   
   

   DTC is output	A
   DTC is not output	B

   1. B: END. 
   2. Replace master cylinder solenoid (See  DISASSEMBLY  ). 
4. Measure voltage of the steering angle sensor. 

   PREPARATION: 

   Remove the column lower cover.

   CHECK: 

   1. Turn the ignition switch to the ON position.
   2. Measure the voltage between terminals 1 and 2, 9 and 2 of the harness side connector.

   OK: 

   STEERING ANGLE SENSOR VOLTAGE SPECIFICATIONS
   
   

   Tester Connection	Condition	Specified Condition
   Terminals 1 - 2	IG switch ON	10 to 14V
   Terminals 9 - 2	IG switch ON	10 to 14V

   Fig 1: Identifying Steering Angle Sensor Connector Terminals (Harness Side)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   CHECK: 

   Measure the resistance between terminal 2 and body ground.

   OK: 

   TERMINAL 2 AND BODY GROUND RESISTANCE SPECIFICATIONS
   
   

   Tester Connection	Condition	Specified Condition
   Terminal 2 - Body ground	Always	Below 1Ω

   1. NG: Check and replace harness and connector. 
   2. OK: Go to next step. 
5. Replace  STEERING ANGLE SENSOR  . 
   1. NEXT: Go to next step. 
6. Reconfirm DTC (See  DTC CHECK / CLEAR   ). 

   PREPARATION: 

   Clear the DTCs.

   CHECK: 

   Check if the same DTCs are detected.

   HINT:

   Drive the vehicle at more than 13 mph (20 km/h) for more than 60 seconds.

   RESULT: 

   DTC OUTPUT RESULT
   
   

   DTC is output	A
   DTC is not output	B

   1. B: END. 
   2. A: Replace master cylinder solenoid (See  DISASSEMBLY  ).