Measure the resistance between the appropriate wheel sensor (+) and ( - ) circuit terminals (see table). DTC Appropriate Terminal (+) Side (-) Side 12 (Right-front) No. 5: FRS (+) No. 4: FRS (+) 14 (Left-front) No. 7: FLS (+) No. 6: FLS (+) 16 (Right-rear) No. 2: RRS (+) No. 1: RRS (+) 18 (Left-rear) No. 9: RLS (+) No. 8: RLS (+) ABS CONTROL UNIT 31P CONNECTOR Wire side of female terminals Is there less than 450 ohms? YES - Repair short to wire between the appropriate wheel sensor (+) and (-) circuits. NO - Go to step 4. Check for continuity between the appropriate wheel sensor (+) circuit terminal and other wheel sensor (+) circuit terminals (see table). DTC Appropriate Terminal Other Terminal 12 No. 5: FRW (+) No. 7 No. 2 No. 9 14 No. 7: FLW (+) No. 5 No. 2 No. 9 16 No. 2: RRW (+) No. 5 No. 7 No. 9 18 No. 9: RLW (+) No. 5 No. 7 No. 2 Is there continuity? YES - Repair short in the wire between the appropriate wheel sensor and the other wheel sensor harnesses. NO - Clear the DTC, and test-drive the vehicle. If the ABS indicator comes on and the same DTC is indicated, replace the ABS modulator-control unit.

DTC 21: Continuous Operation (Chipped pulsar) Clear the DTC. 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. Check the pulsar gear for a chipped tooth. Is the pulsar OK? YES - Check for loose 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 pulsar gear).