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)

Or, hide this message: temporarily or permanently

Test K: Engine Coolant Temperature (ECT) Sensor



PINPOINT TEST K: ENGINE COOLANT TEMPERATURE (ECT) SENSOR

This pinpoint test is intended to diagnose the following:

^ ECT sensor (12A648)

^ harness circuits: ECT and SIGRTN

^ powertrain control module (PCM) (12A650)













K1 - K2:





K3 - K4:





K5 - K6:





K7 - K8: