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
Coolant Temperature Sensor/Switch: Description and Operation
The engine coolant temperature is detected by the engine coolant temperature sensor in the electronic fuel injection system and sent from ECM to TCM as a signal. TCM uses this signal as one of the factors to control gear shift to the 4th (O/D) gear, TCC operation and throttle pressure.
