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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 23 (Hybrid Control System - Diagnostic Codes (1 Of 7)) >> HYBRID CONTROL SYSTEM (for PHEV Model) >> DTC C1348-00: Different Diameter Tire [08/2023 - ] >> Procedure

DTC C1348-00: Different Diameter Tire [08/2023 - ]: Procedure

WARNING: This page is about a different car, the 2025 Lexus RX 450h+ and 2024 Lexus RX 450h+. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK TIRES 

    Pre-procedure1

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

      Refer to INSPECTION [10/2022 - ]

      HINT: 

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

    Post-procedure1

    • None.

    Result: 

    NEXT 

    See step  2

  2. CLEAR DTC 
    1. Clear the DTCs.

      Powertrain > Hybrid Control > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  3

  3. CHECK DTC OUTPUT (HYBRID CONTROL) 

    Pre-procedure1

    • Drive the vehicle at a speed of 30 km/h (19 mph) or more.
    • Check if the same DTC is output.

      Powertrain > Hybrid Control > Trouble Codes 

      Result

      Result Proceed to
      DTCs are not output A
      DTCs are output B

    Post-procedure1

    • None.

    Result: 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ] 

    Result: 

    See step  4

  4. CHECK DTC OUTPUT 

    Pre-procedure1

    • Drive the vehicle at a speed of 30 km/h (19 mph) or more.
    • Check that no speed sensor DTCs are output.

      Chassis > Brake/EPB > Trouble Codes 

      HINT: 

      Result

      Result Proceed to
      DTCs are not output A
      DTCs are output B

    Post-procedure1

    • None.

    Result: 

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

    Result: 

    REPAIR CIRCUITS INDICATED BY OUTPUT DTCS. Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2023 - ]