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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Engine Temperature Sensor (Coolant)




Check function:
[D] 200 - The indicated engine temperature should correspond to the coolant temperature. A value below - 30 °C indicates a break in the temperature sensor or in the wire to the DME control unit.

Resistance test:
Connect universal adapter to the engine wire harness. Measure resistance over the terminals 45 and 19.