ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1348

DTC Code DTC Name
C1348 Different Diameter Tire Malfunction

DESCRIPTION

If the hybrid vehicle control ECU receives a signal from the skid control ECU (brake booster with master cylinder assembly) that the AWD system is malfunctioning, the hybrid vehicle control ECU outputs this DTC.

DTC No. Detection Item INF Code DTC Detection Condition Trouble Area Note
C1348 Different Diameter Tire Malfunction 216 Large difference between front and rear tire revolution when driving straight ahead at a constant speed of 30 km/h or higher

  • Incorrect tire size

  • Tire air pressure not adjusted correctly

  • Speed sensor system

  • Hybrid vehicle control ECU

AWD system DTC

Tech Tips

Destination ECU: Hybrid vehicle control ECU

PROCEDURE


  1. CHECK TIRE SIZE


    1. Check the tire sizes to ensure that the front and rear tire sizes are not different.

      Click here

      Tech Tips

      If different tire sizes are discovered, replace the tires so that the tire sizes are the same on all 4 wheels.

    2. Adjust the air pressure in the tires.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  2. RECONFIRM DTC


    1. Clear the DTCs.

      Click here


      Powertrain > Hybrid Control > Clear DTCs

    2. Turn the power switch off.

    3. Turn the power switch on (READY).

    4. Drive the vehicle at a constant speed of 30 km/h or higher for several minutes.

    5. Check if the same DTC is output.

      Click here


      Powertrain > Hybrid Control > Trouble Codes

    6. Check that no electronically controlled brake system speed sensor DTCs are output.

      Click here


      Chassis > ABS/VSC/TRC > Trouble Codes

      Tech Tips


      • If C1348 and electronically controlled brake system DTCs are output simultaneously, check and repair the trouble areas in the electronically controlled brake system.

        Click here

      • When a DTC has been stored, the vehicle condition when the DTC was stored can be determined from the freeze frame data.

        Hybrid Control System: Click here

        Electronically Controlled Brake System: Click here

      Result
      Result Proceed to
      DTCs not output A
      Electronically controlled brake system speed sensor DTCs are output B
      Only C1348 is output C

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPAIR CIRCUITS INDICATED BY OUTPUT DTCS Click here

    C

    REPLACE HYBRID VEHICLE CONTROL ECU Click here