Inspection Procedure

HINT:

Check the condition of each related circuit connector before troubleshooting (see ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

1. CHECK FOR DTC 
   1. Clear the DTC (see DTC CHECK / CLEAR ).
   2. Turn the ignition switch OFF.
   3. Turn the ignition switch ON again and check that no CAN communication system DTC(s) is output.
   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 (24 mph) and check that no brake control system (steering angle sensor) DTC (C1231/31) is output (see DIAGNOSTIC TROUBLE CODE CHART ).

      Result 

      RESULT
      
      

      Result	Proceed to
      Neither CAN communication system DTC nor brake control system DTC is out put	A
      CAN communication system DTC is output	B
      Brake control system (steering angle sensor) DTC (C1231/31) is output	C

      HINT:

      When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor.

   B: REPAIR CIRCUIT INDICATOR OUTPUT CODE (CAN COMMUNICATION SYSTEM) 

   C: REPAIR OR REPLACE CIRCUIT INDICATOR OUTPUT CODE (STEERING ANGLE SENSOR CIRCUIT) 

   A: GO TO NEXT STEP. 

2. CHECK WIRE HARNESS (STEERING ANGLE SENSOR - BATTERY) 
   1. Disconnect the E11 sensor connector.
   2. Measure the voltage of the wire harness side connector.

      Standard voltage 

      TESTER CONNECTION AND SPECIFIED CONDITION
      
      

      Tester Condition	Condition	Specified Condition
      E11-1 (IG) - Body ground	Ignition switch ON	10 to 14 V

   NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

   Fig 1: Identifying E11 Sensor Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: GO TO NEXT STEP. 

3. CHECK WIRE HARNESS (STEERING ANGLE SENSOR - BODY GROUND) 
   1. Disconnect the E11 sensor connector.
   2. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION
      
      

      Tester Condition	Specified Condition
      E11-2 (ESS) - Body ground	Below 1 Ω

      Fig 2: Identifying E11 Sensor Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result 

      RESULT
      
      

      Result	Proceed to
      OK (When troubleshooting according to PROBLEM SYMPTOMS TABLE)	A
      OK (When troubleshooting according to DTC chart)	B
      NG	C

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

   C: REPAIR OR REPLACE HARNESS AND CONNECTOR 

   A: REPLACE STEERING ANGLE SENSOR