Legacy Sedan 4WD F4-2.2L SOHC (1992)
Disconnect sensor connector and measure resistance between sensor terminals. It should read as follows:
Resistance:
Temperature:
2.0 - 3.0K Ohms
20°C (68°F)
0.3 - 0.4K Ohms
80°C (176°F)
CHECK HARNESS BETWEEN ECU AND COOLANT SENSOR
1. Disconnect ECU and coolant sensor connectors.
2. Measure resistance between ECU and coolant sensor connectors as follows:
Connector & terminal:
Resistance:
(B48)7 - (E7)1
0 Ohm
(B48)21 - (E7)2
0 Ohm
3. Measure resistance between coolant sensor terminals and ground as follows:
Connector & terminal:
Resistance:
(E7)1 - Ground
1M Ohms min.
(E7)2 - Ground
1M Ohms min.