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 (For Computer): Testing and Inspection
A Tech 1 scan tool displays engine coolant temperature
(ECT) in degrees. After the engine is started, the temperature should rise steadily to about 90°C (194°F) then stabilize when the thermostat opens. If the engine has not been run for several hours (overnight) the engine coolant and intake air temperature (IAT) sensor should be within 5 degrees of each other. A fault in the ECT sensor circuit should set a DTC P0117 or DTC P0118. The Diagnostic Trouble Code (DTC) charts also contain a chart to check for sensor resistance values relative to temperature.
Testing and Inspection