Unwarranted Abs Activity
- Premature loss of speed sensor signal during vehicle deceleration may be caused by a weak or erratic sensor signal or a damaged rotor. To correct this condition, refer to TEST LL under CIRCUIT TEST for left front sensor, TEST MM for right front sensor, or TEST NN for rear axle sensor under CIRCUIT TESTS. Inspect rotors. Repair as necessary.
- Intermittent speed sensor signal to control module during deceleration may be caused by intermittently open or shorted sensor circuit, an open sensor circuit at wire connections (especially at bulkhead connections), chafed wire insulation, or a wire pinched due to improper routing. To correct these conditions, perform INTERMITTENT DIAGNOSIS PROCEDURE on speed sensor circuits and connectors. See WIRING DIAGRAMS for circuit identification. Inspect front and rear sensor wiring harness routing from sensor to frame for worn or chafed wire insulation.
- Misadjusted rear brakes or brake grab may be caused by rear brake adjustment too tight, or defective pads or brake linings. To correct condition, inspect brake pads and linings for uneven wear and contamination. Inspect rotors and drums for out-of-round condition. Repair or replace components as necessary.