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 Temperature Sensor ( Ambient / Intake ): Testing and Inspection

To check temperature sensor I, disconnect air flow sensor plug, then using suitable ohmmeter measure resistance across terminals 1 and 4 (outer terminals) of air flow sensor. Resistance should be:

0°C = 4400 to 6800 ohms
15-30°C = 1400 to 3600 ohms
40°C = 1000 to 1300 ohms