Neon, 2000-2005

Wheel Speed Sensor Rotors (Toothed Rings)

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Inspection



Tone wheels can cause erratic wheel speed sensor signals. Inspect tone wheels for the following possible causes:



Missing, chipped, or broken teeth
 
Contact with the wheel speed sensor
 
Wheel speed sensor to tone wheel alignment
 
Wheel speed sensor to tone wheel clearance
 
Excessive tone wheel run-out
 
Tone wheel loose on its mounting surface
 

If a front tone wheel is found to need replacement, the halfshaft must be replaced. No attempt should be made to replace just the tone wheel.

If a rear tone wheel is found to need replacement, the rear hub and bearing must be replaced. No attempt should be made to replace just the tone wheel.

If wheel speed sensor to tone wheel contact is evident, determine the cause and correct it before replacing the wheel speed sensor or tone wheel.

Tone wheels are pressed onto their mounting surfaces and should not rotate independently from the mounting surface. Replace the front halfshaft or rear hub and bearing as necessary.

Check the gap between the speed sensor head and the tone wheel to ensure it is within specifications.

Excessive tone wheel run-out can cause erratic wheel speed sensor signals. If tone wheel run out is excessive, determine if it is caused by a defect in the halfshaft assembly or hub and bearing. Replace as necessary.

Specifications



Wheel speed sensor to tone wheel air gap specifications:



Front: 0.011-0.056 inch (0.28-1.42mm)
 
Rear: 0.0.18-0.044 inch (0.045-1.12mm)
 

Tone wheel run-out specifications:



Max. front run-out: 0.009 inch (0.25mm)
 
Max rear run-out: 0.009 inch (0.25mm)
 

 
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