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
Checking Oxygen Sensor Heater
Tests 1 - 4:
SYMPTOM CHECKING THE OXYGEN SENSOR HEATER
POSSIBLE CAUSES -
Any upstream
O2 sensor voltage below
1.0 volt -
ASD relay output circuit open
-
Heater ground circuit open
-
O2 sensor