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

Downstream Sensor

Heated Oxygen Sensor Check:

1. Disconnect the heated oxygen sensor connection
2. Check that there is continuity between following terminals:
- Front bank side -- terminals 1 & 3
- Rear bank side -- terminals 3 & 4
3. If there is no continuity, replace the heated oxygen sensor.

NOTE: If the scan tool does not display the standard value although no malfunction is found by the above-mentioned continuity test and harness check, replace the heated oxygen sensor.