DTC 21

DTC 21: Continuous Operation (Chipped pulser)
1. Clear the DTC.
2. Test-drive the vehicle at 19 mph (30 km/h) or more.
Does the ABS indicator come on and is DTC 21 indicated?
YES - Go to step 3.
NO - The system is OK at this time.
3. Check the purser gears for a chipped tooth.
Are the purser gears OK?
YES - Check for loose terminals in the ABS control unit 31P connector. If necessary, substitute a known-good ABS modulator-control unit, and recheck.
NO - Replace the driveshaft or hub unit. (Chipped 2 Pulser gear).