DTC 71

DTC 71: Different Diameter Tire
1. Clear the DTC.
2. Test-drive the vehicle.
Does the ABS indicator come on, and is DTC 71 indicated?
YES - Go to step 3.
NO - Intermittent failure; confirm that tire inflation is set to spec. The vehicle is OK at this time.
3. Check that all four tires-are the specified size and are inflated to the proper specification.
Are all four tires the correct size and properly inflated?
YES - Go to step 4.
NO - Install the correct tires or set the tires to the correct inflation, and retest.
4. With the vehicle on level ground, mark each tire with a small spot of grease. Roll the vehicle until each of the tires makes two grease spots on the floor.
5. Measure and record the distance between the two grease spots.
Is the difference between the shortest and the longest measurement more than 10 %?
YES - Replace the tire/tires that is smaller or larger than the others.
NO - Replace the ABS modulator-control unit.