Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
DIGIFANT IICoolant Temperature Sensor - Checking
The following checks verify proper function of the coolant temperature sensor, related wiring and connectors.
- Switch the ignition OFF.
- Disconnect the multi-pin connector from the Digifant E.C.U.
- Measure temperature of the coolant temperature sensor with a probe type thermometer.
- Connect US 1119 set to ohm scale across terminals 6 and 10 of the Digifant E.C.U. connector.
Resistance should correspond with the graph.
If the resistance is not within the specifications,
- Disconnect coolant temperature sensor.
- Measure resistance across the terminals of the coolant temperature sensor with US 1119 set to ohms scale.
Resistance should correspond with the graph.
If the resistance is not OK,
- Replace the coolant temperature sensor. If the resistance value is OK,
- Repair the wiring to the Digifant E.C.U. using the wiring diagram.