C1348

AXLE SYSTEM: C1348: Different Diameter Tire Malfunction

DTC C1348 - Different Diameter Tire Malfunction

DESCRIPTION

The skid control ECU measures the speed of each wheel by receiving signals from the speed sensors. These signals are used to recognize that all 4 wheels are operating properly. Therefore, all wheel signals must be equal.









INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC
(a) Check the output DTC (axle system, brake control system, CAN communication system).
Result:





HINT: When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor.

B -- REPAIR CIRCUIT INDICATED BY OUTPUT CODE
A -- Continue to next step.
2. CHECK TIRE CONDITION
(a) Check the size and condition of all 4 tires Component Tests and General Diagnostics.
HINT: This DTC is output when tire deformation or a difference in tire sizes is detected.

OK:
The diameter and air pressure of all 4 tires are the same.
NG -- REPLACE TIRES SO THAT ALL 4 TIRE ARE THE SAME IN SIZE, OR ADJUST TIRE PRESSURE
OK -- Continue to next step.
3. READ VALUE OF TECHSTREAM
(a) Connect the Techstream to the DLC3.
(b) Start the engine.
(c) Select the "Data List" on the Techstream Scan Tool Testing and Procedures.
(d) Drive the vehicle several times and check that the speed values detected at all 4 wheels displayed on the Techstream are the same.

DATA LIST: ABS / VSC / TRAC





OK:
The vehicle speed detected at all 4 wheels must be indicated on the Techstream.
NG -- CHECK SPEED SENSOR SIGNAL CIRCUIT (BRAKE CONTROL SYSTEM)
OK -- Continue to next step.
4. RECONFIRM DTC
(a) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.
(b) Turn the ignition switch off.
(c) Start the engine.
(d) Drive the vehicle several times at the speed of 18 mph (30 km/h) or more and check that same DTC is output.
Result:






B -- END
A -- REPLACE SKID CONTROL ECU