Front

Speed Sensor Connector:

Speed Sensor Installation:

Sensor Rotor:

Speed Sensor Oscilloscope Waveform:

1. Inspect wheel speed sensor.
a. Remove the bolt from the pipe clamp of the wire harness.
b. Disconnect the speed sensor connector.
c. Measure the resistance between terminals. Refer to SPECIFICATIONS. If sensor resistance is not as specified, replace the sensor.
d. Check for no continuity between each terminal and sensor body.
e. connect speed sensor connector.
f. Install the bolt of the pipe clamp.
2. Check sensor installation.
a. Check that that the sensor installation bolt is tightened properly. If not, tighten the bolt to 6 ft.-lb.
b. Check for no clearance between the sensor and rear axle carrier. If there is clearance, replace the sensor.
3. Visually inspect sensor rotor serrations.
a. Remove drive shaft.
b. Inspect the sensor rotor serrations for scratches, cracks, warping, or missing teeth.
c. Install the drive shaft.
4. Inspect front speed sensor and sensor serrations by using an oscilloscope.
a. Connect an oscilloscope to the speed sensor connector.
b. Run the vehicle at 12.4 mph, and inspect speed sensor output wave.
c. Check that C is 0.5V or more. If not as specified, replace the speed sensor.
d. Check that B is 70% or more of A. If not as specified, replace the front axle hub.