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 - 3:
Tests 4 - 8:
SYMPTOM CHECKING OXYGEN SENSOR HEATER
POSSIBLE CAUSES -
1/2
O2 sensor voltage between
0.4 V & 0.6 V -
1/1 O2 sensor defective
-
1/2
O2 sensor defective
-
ASD relay output circuit open (1/1
O2 sensor)
-
ASD relay output circuit open (1/2
O2 sensor)
-
Heater ground circuit open (1/1
O2 sensor)
-
Heater ground circuit open (1/2
O2 sensor)
