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Home >> Toyota >> 2008 >> FJ Cruiser RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 24 (Brakes - Abs With VSC (Diagnostics)) >> Vehicle Stability Control System >> DTC C1231/31, C1335/35: Steering Angle Sensor Circuit Malfunction; Steering Angle Sensor Circuit >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

When using the intelligent tester, start from  1. When not using the intelligent tester, start from  2.

  1. READ DATA LIST (STEERING ANGLE SENSOR) 
    1. Check the DATA LIST for proper functioning of the steering angle sensor.

      Skid control ECU assembly: 

      DATA LIST

      Item Measurement Item / Range (Display) Normal Condition Diagnostic Note
      STEERING ANG Steering sensor / Min.: -1682 deg, Max.: 1877 deg -1682 to 1877 deg Turning the steering wheel changes the value
      Left: Becomes greater
      Right: Becomes smaller

      OK: Steering wheel turning angle value must be changing. 

    OK: Go to step   5 

    NG: GO TO NEXT STEP 

  2. CHECK WIRE HARNESS (COMBINATION SWITCH - BATTERY) 
    1. Remove the column lower cover.
    2. Turn the ignition switch ON.
    3. Measure voltage of the wire harness side connector.

      Standard voltage 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      C17-1 (IG1) - C17-2 (ESS) Ignition switch ON 10 to 14 V
      C17-9 (BAT) - C17-2 (ESS) Always 10 to 14 V

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    Fig 1: Identifying Combination Switch Terminals
    G04440341Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO TO NEXT STEP 

  3. INSPECT STEERING ANGLE SENSOR 
    Fig 2: Identifying Wire Harness Side Connector Terminals
    G04440342Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the No. 2 and No. 3 steering wheel lower covers, steering wheel pad, and steering wheel column upper and lower covers.
    2. Disconnect the combination switch connector (for steering angle sensor).
    3. Connect an oscilloscope to terminals 3 and 4 of the combination switch connector (for steering angle sensor).
    4. Apply battery positive voltage between terminals 1 and 2.
    5. Turn the steering wheel slowly and check the signal waveform.

      OK: A waveform is output as shown. 

      HINT:

      The above signal waveform does not repeat ON and OFF regularly, and this interval changes according to the data.

    NG: REPLACE STEERING ANGLE SENSOR 

    OK: GO TO NEXT STEP 

  4. CHECK STEERING SENSOR DISC 
    1. Check steering sensor disc.

    NG: REPLACE STEERING SENSOR DISC 

    OK: GO TO NEXT STEP 

  5. CHECK WIRE HARNESS (COMBINATION SWITCH - SKID CONTROL ECU ASSEMBLY) 

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: REPLACE SKID CONTROL ECU ASSEMBLY 

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