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)

Or, hide this message: temporarily or permanently

Air Flow Meter/Sensor: Testing and Inspection

Air Flow Sensor Inspection:






1. Check sensor body for cracks and damage.
2. Verify that measuring cone move in and out smoothly.

Air Flow Sensor Specification Chart:






3. Measure resistance across terminals as described on image chart.
4. Inspect grommet and replace if needed.
5. Sensor is not repairable; replace if any problems are detected.