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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Sensor Heating Element Test

Use an ohmmeter to test the heating element of the oxygen sensors:
- Disconnect the electrical connector from each oxygen sensor.
- The white wires in the sensor connector are the power and ground circuits for the heater.
- Connect the ohmmeter test leads to terminals of the white wires in the heated oxygen sensor connector.
- Replace the heated oxygen sensor if the resistance is not between 4 and 7 ohms.