FixVault
Home › Lexus › 2008 › GX 470 › Repair and Diagnosis › Brakes › Traction Control › Brake Control › Vehicle Stability Control System › DTC C1337/37 Different Diameter Tire Malfunction › Inspection Procedure

Inspection Procedure

NOTE: When replacing the master cylinder solenoid, perform zero point calibration (See CALIBRATION  ).
  1. CHECK TIRE SIZE 
    1. Check tire size and condition of all 4 wheels.

    NG: REPLACE TIRES SO THAT ALL 4 TIRES ARE SAME IN SIZE 

    OK: Go to next step 

  2. INSPECT SPEED SENSOR ROTOR 
    1. Check the front speed sensor circuit (See DTC C0200/31 FRONT SPEED SENSOR RH CIRCUIT; DTC C0205/32 FRONT SPEED SENSOR LH CIRCUIT; DTC C1235/35 FOREIGN OBJECT IS ATTACHED ON TIP OF FRONT SPEED SENSOR RH; DTC C1236/36 FOREIGN OBJECT IS ATTACHED ON TIP OF FRONT SPEED SENSOR LH  ) and rear speed sensor circuit (See DTC C0210/33 REAR SPEED SENSOR RH CIRCUIT; DTC C0215/34 REAR SPEED SENSOR LH CIRCUIT; DTC C1238/38 FOREIGN OBJECT IS ATTACHED ON TIP OF REAR SPEED SENSOR RH; DTC C1239/39 FOREIGN OBJECT IS ATTACHED ON TIP OF REAR SPEED SENSOR LH  ).

    NG: REPLACE SPEED SENSOR ROTOR 

    OK: Go to next step 

  3. INSPECT SPEED SENSOR 
    1. Check the front speed sensor circuit (See DTC C0200/31 FRONT SPEED SENSOR RH CIRCUIT; DTC C0205/32 FRONT SPEED SENSOR LH CIRCUIT; DTC C1235/35 FOREIGN OBJECT IS ATTACHED ON TIP OF FRONT SPEED SENSOR RH; DTC C1236/36 FOREIGN OBJECT IS ATTACHED ON TIP OF FRONT SPEED SENSOR LH  ) and rear speed sensor circuit (See DTC C0210/33 REAR SPEED SENSOR RH CIRCUIT; DTC C0215/34 REAR SPEED SENSOR LH CIRCUIT; DTC C1238/38 FOREIGN OBJECT IS ATTACHED ON TIP OF REAR SPEED SENSOR RH; DTC C1239/39 FOREIGN OBJECT IS ATTACHED ON TIP OF REAR SPEED SENSOR LH  ).

    NG: REPLACE SPEED SENSOR 

    OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - SPEED SENSOR) 
    1. Check the front speed sensor circuit (See DTC C0200/31 FRONT SPEED SENSOR RH CIRCUIT; DTC C0205/32 FRONT SPEED SENSOR LH CIRCUIT; DTC C1235/35 FOREIGN OBJECT IS ATTACHED ON TIP OF FRONT SPEED SENSOR RH; DTC C1236/36 FOREIGN OBJECT IS ATTACHED ON TIP OF FRONT SPEED SENSOR LH  ) and rear speed sensor circuit (See DTC C0210/33 REAR SPEED SENSOR RH CIRCUIT; DTC C0215/34 REAR SPEED SENSOR LH CIRCUIT; DTC C1238/38 FOREIGN OBJECT IS ATTACHED ON TIP OF REAR SPEED SENSOR RH; DTC C1239/39 FOREIGN OBJECT IS ATTACHED ON TIP OF REAR SPEED SENSOR LH  ).

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (SPEED SENSOR CIRCUIT) 

    OK: Go to next step 

  5. RECONFIRM DTC 
    1. Clear the DTCs (See DTC CHECK/CLEAR  ).
    2. Drive the vehicle at a speed of approximately 32 km/h (20 mph) or more for 60 seconds or more.
    3. Check if the same pending DTCs are detected (See DTC CHECK/CLEAR  ).

      HINT.

      Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.

      Result 

      RESULT CHART

      Condition Proceed to
      DTC is output A
      DTC is not output B

    B: END 

    A: REPLACE MASTER CYLINDER SOLENOID 

About FixVault