Operation CHARM: Car repair manuals for everyone.
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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Cylinder Block Heater Inspection

Cylinder Block Heater (If Equipped) Inspection
1) Check continuity between terminal "a" and "c" by using ohmmeter.
If there is no continuity, replace cylinder block heater.
2) Check that there is no continuity between terminal "a" and "b" or "c" and "b". If there is continuity, replace cylinder block heater.





3) Check no continuity between "c" and block heater body.
If there is continuity, replace cylinder block heater.