Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Different Diameter Tire (C134800)

Toyota Corolla Cross (2022-2024) Service Manual / Engine & Hybrid System / Hybrid / Battery Control / Hybrid Control System / Different Diameter Tire (C134800)

DESCRIPTION

If the hybrid vehicle control ECU receives a signal from the skid control ECU that the AWD system is malfunctioning, the hybrid vehicle control ECU outputs this DTC.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

Note

C134800

Different Diameter Tire

The vehicle is being driven in a straight line at a constant speed of 30 km/h (19 mph) or more, and the wheel speeds differ between front and rear significantly.

(1 trip detection logic)
  • Tire and wheel size
  • Tire pressure
  • Speed sensor circuit
  • Hybrid vehicle control ECU

Does not come on

Master Warning:

Does not come on

SAE Code:

C1348

PROCEDURE

1.

CHECK TIRES

(a) Check the tire sizes to ensure that the front and rear tire sizes are not different.

Click here

HINT:

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

(b) Adjust the air pressure in the tires.

Click here

NEXT

2.

RECONFIRM DTC

(a) Clear the DTCs.

Powertrain > Hybrid Control > Clear DTCs

(b) Drive the vehicle at a speed of 30 km/h (19 mph) or more.

(c) Check if the same DTC is output.

Powertrain > Hybrid Control > Trouble Codes

(d) Check that no speed sensor DTCs are output.

Chassis > Brake/EPB > Trouble Codes

HINT:

  • If C134800 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

Proceed to

DTC C134800 and speed sensor DTC are not output.

A

Speed sensor DTC is output.

B

DTC C134800 is output.

C
A

USE SIMULATION METHOD TO CHECK

B

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

C

REPLACE HYBRID VEHICLE CONTROL ECU

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