Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Wheel Speed Sensor: Testing and Inspection

Wheel Sensor Inspection

1. Check the magnetic encoder (A) after cleaning. If necessary, replace the wheel bearing.
^ Front wheel bearing replacement.
^ Rear wheel bearing replacement.





2. Measure the air gap between the wheel sensor (B) and the magnetic encoder all the way around while rotating the encoder.

Standard:
Front: 0.5-1.5 mm (0.02-0.06 in.)
Rear: 0.5-1.5 mm (0.02-0.06 in.)