DTC Troubleshooting: 71

DTC 71: Different Diameter Tyre Clear the DTC. Disconnect the HDS from the 16P DLC. Turn the ignition switch OFF, then turn it ON (II) again. Test-drive the vehicle. Does the ABS indicator come on, and is DTC 71 indicated?
YES | - | Go to Step 5 .
NO | - | Intermittent failure; confirm that tyre inflation is set to spec. The vehicle is OK at this time.■
Check that all four tyres are the specified size and are inflated to the proper specification. Are all four tyres the correct size and properly inflated?
YES | - | Go to Step 6 .
NO | - | Install the correct tyres or set the tyres to the correct inflation, and retest.■
With the vehicle on level ground, mark each tyre with a small spot of grease. Roll the vehicle until each of the tyres makes two grease spots on the floor. Measure and record the distance between the two grease spots. Is the distance between the shortest and the longest measurement more than 10 %?
YES | - | Replace the tyre/tyres that is smaller or larger than the others.■
NO | - | Replace the ABS modulator-control unit. ■