Del Sol Si VTEC L4-1590cc 1.6L DOHC (VTEC) MFI (1997)
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Temperature Sensor (Gauge): Testing and Inspection
1. Disconnect the YEL/GRN wire from the sending unit.
Sending Unit Test
2. With the engine cold, use an ohmmeter to measure resistance between the positive terminal and the engine (ground).
3. Check the temperature of the engine coolant.
Sending Unit Test
4. Run the engine and measure the change in resistance with the engine at operating temperature (radiator fan comes on).
5. If the readings you get are substantially different from the specifications above, replace the sending unit.
