DTC C1348-00: Different Diameter Tire [10/2022 - ]: Procedure

WARNING: This page is about a different car, the 2025 Lexus RX 350h, 2024 Lexus RX 350h, and 2023 Lexus RX 350h. However, it is still accessible from the selected car via links, so may be relevant.

CHECK TIRES

Pre-procedure1

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

Refer to INSPECTION [10/2022 - ]

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

Adjust the air pressure in the tires.

HINT:

Refer to INSPECTION [10/2022 - ]

Result

Proceed to
NEXT

Post-procedure1

None.

Result:

See step 2

CLEAR DTC

Clear the DTCs.

Powertrain > Hybrid Control > Clear DTCs

Result

Proceed to
NEXT

Result:

See step 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

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:

If C1348-00 and electronically controlled brake system DTCs are output simultaneously, check and repair the trouble areas in the electronically controlled brake system.
Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ]
When a DTC has been stored, the vehicle condition when the DTC was stored can be determined from the freeze frame data.
1. Hybrid Control System:
  Refer to FREEZE FRAME DATA [10/2022 - 10/2024] , or refer to FREEZE FRAME DATA [10/2024 - ]
2. Electronically Controlled Brake System:
  Refer to FREEZE FRAME DATA [10/2022 - 08/2023] , or refer to FREEZE FRAME DATA [08/2023 - ]

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 [10/2022 - 08/2023] , or refer to DIAGNOSTIC TROUBLE CODE CHART [08/2023 - ]