Wheel Speed Sensor
- Disconnect harness connector from the appropriate Wheel Speed Sensor (WSS). Using a digital volt/ohmmeter, measure resistance across WSS terminals. Resistance specification should be 900-1300 ohms. Replace WSS if resistance is not within specification. See appropriate procedure under REMOVAL & INSTALLATION If resistance is within specification, go to next step.
- Using a feeler gauge, check WSS air gap in at least 4 places. Clearance should be .017-.067" (.42-1.71 mm) for front WSS, and 0.15-0.52" (.38-1.31 mm) for rear WSS. Repair air gap as necessary. If air gap is okay, use a dial indicator to check tone wheel runout. Replace tone wheel if runout exceeds .006" (.15 mm).
NOTE:
Front tone wheel is pressed into front axle shaft, and rear tone wheel is pressed into rear hub and bearing assembly. Replacement of tone wheel requires replacement of axle shaft or rear hub bearing assembly.