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Home >> Toyota >> 2008 >> FJ Cruiser RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 146 (Brakes - Abs With VSC) >> Vehicle Stability Control System >> DTC C1231/31 Steering Angle Sensor Circuit Malfunction; DTC C1335/35 Steering Angle Sensor Circuit >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2007 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 
    1. Check the DATA LIST for proper functioning of the steering angle sensor.

    Skid control ECU assembly: 

    DATA LIST REFERENCE

    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)*2 
    1. Remove the column lower cover.
    2. Turn the ignition switch ON.
    3. Measure voltage of the wire harness side connector.

    Standard voltage 

    STANDARD VOLTAGE REFERENCE CHART

    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
    G05197619Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO TO Next Step 

  3. INSPECT STEERING ANGLE SENSOR 
    Fig 2: Identifying Steering Angle Sensor Connector Terminal
    G05197620Courtesy 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 in the illustration. 

    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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