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Home >> Lexus >> 2013 >> IS 250 Base, AWD >> Repair and Diagnosis (Single Page) >> Transmission >> Transfer Case >> Four Wheel Drive Control System (Diagnostic Codes & Circuit Tests) >> Four Wheel Drive Control System >> DTC C1297/97: Steering Angle Sensor >> Procedure

DTC C1297/97: Steering Angle Sensor: Procedure

  1. CHECK DTC 
    1. Clear the DTC. Refer to DTC CHECK/CLEAR [08/2012 - ] .
    2. Turn the engine switch off.
    3. Turn the engine switch on (IG) and check that no CAN communication system DTC is output.
    4. Start the engine.
    5. Drive the vehicle and turn the steering wheel to the right and left at a speed of 24 mph (35 km/h) and check if brake control system DTC and/or a CAN communication system DTC are output.

      Result

      Result Proceed to
      Neither a CAN communication system DTC nor brake control system DTC is output A
      CAN communication system DTC is output B
      Brake control system DTC 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 CIRCUITS INDICATED BY OUTPUT DTCS (CAN COMMUNICATION SYSTEM) 

    C → REPAIR CIRCUITS INDICATED BY OUTPUT DTCS (BRAKE CONTROL SYSTEM) 

    A: Go to next step 

  2. INSPECT STEERING ANGLE SENSOR 
    1. Connect the Techstream to the DLC3.
    2. Start the engine.
    3. Drive the vehicle at a speed of 24 mph (35 km/h) or more for approximately 5 seconds.

      HINT: 

      The 4WD control ECU acquires steering angle sensor zero point every time the engine switch is turned on (IG) and vehicle is driven at 24 mph (35 km/h) or more for approximately 5 seconds. The ECU stores the previous zero point.

    4. Select the "Data List" on the Techstream. Refer to DATA LIST/ACTIVE TEST [08/2012 - ] .
      DATA LIST: 4WD

      Item Measurement Item/Range (Display) Normal Condition
      Steering Angle Value Steering Angle Value/
      Min.: -3276.8 deg
      Max.: 3276.7 deg      		 Left: -3276.8 deg
      Center: Approx. 0 deg
      Right: 3276.7 deg
    5. Check that the steering angle sensor value changes in accordance with the steering wheel movement.

      HINT: 

      • Steering sensor value displayed on the Techstream is as follows:
        • The steering wheel is centered: approximately 0 deg.
        • The steering wheel is fully turned to left: -3276.8 deg.
        • The steering wheel is fully turned to light: 3276.8 deg.

      Standard

      The steering angle sensor value changes in accordance with the steering wheel movement.

    NG → See step   3 

    OK → REPLACE 4WD CONTROL ECU 

  3. INSPECT STEERING ANGLE SENSOR (STEERING ANGLE SENSOR POWER SOURCE CIRCUIT) 
    1. Disconnect the steering angle sensor connector.
      GTY134461Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the engine switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard voltage

      Tester Connection Condition Specified Condition
      J23-1 (IG) -
      Body ground      		 Engine switch on (IG) 10 to 14 V

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (IG CIRCUIT) 

    OK: Go to next step 

  4. INSPECT STEERING ANGLE SENSOR (STEERING ANGLE SENSOR GROUND CIRCUIT) 
    1. Turn the engine switch off.
      GTY134460Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Specified Condition
      J23-2 (ESS) - Body ground Below 1 Ω

      Result

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

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

    C → REPAIR OR REPLACE HARNESS OR CONNECTOR (ESS CIRCUIT) 

    A → REPLACE STEERING ANGLE SENSOR 

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