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
Oxygen Sensor Relay: Description and Operation
The oxygen sensor is equipped with a heating element that is ECU controlled through a
relay. The heating element quickly warms the sensor to operating temperature. With this system, sensor operating temperature is maintained when it would otherwise tend to cool down, such as during extended curb idle.