Engine Coolant Temperature (ECT) sensor(s) — replacement
Warning: Wait until the engine has cooled completely before beginning this procedure.
Engine Coolant Temperature (ECT) sensor
1. The Engine Coolant Temperature (ECT)sensor 1 is located at the right end of the cylinder head (see illustration).
i.1 The Engine Coolant Temperature (ECT) sensor is located on the thermostathousing (Civic 1.8L engine shown)
2. Drain the engine coolant (see Tune-up and routine maintenance).
Note: If you don’t drain the coolant, some coolant will run out when you remove the ECT sensor, so install the new sensor as quickly as possible.
3. On 2015 and later CR-V models, removethe high-pressure fuel pump cover.
4. Disconnect the electrical connector fromthe ECT sensor.
5. Unscrew the ECT sensor.
Caution: If you’re planning to reuse the old ECT sensor, handle it with care. Damage to the ECT sensor will adversely affect the operation of the PGM-Fl system.
6. Remove and discard the old ECT sensor0-ring. Whether you’re planning to reuse the old ECT sensor or install a new unit, be sure to use a new 0-ring.
7. Installation is the reverse of removal. Besure to tighten the ECT sensor securely.
8. Refill the cooling system (see Tune-up and routine maintenance).
Engine Coolant Temperature (ECT) sensor 2
9. The Engine Coolant Temperature (ECT)sensor 2 is located in the lower radiator tank next to the radiator hose (see illustration).
i.9 ECT sensor no. 2 is located on the back side of the lower radiator tank
10. Drain the engine coolant (see Tune-up and routine maintenance).
11. Disconnect the electrical connector from the ECT sensor.
12. Unscrew the ECT sensor.
Caution: If you’re planning to reuse the old ECT sensor, handle it with care. Damage to the ECT sensor will adversely affect the operation of the PGM-Fl system.
13. Remove and discard the old ECT sensor 0-ring. Whether you’re planning to reuse the old ECT sensor or install a new unit, be sure to use a new 0-ring.
14. Installation is the reverse of removal. Be sure to tighten the ECT sensor securely.
15. Refill the cooling system (see Tune-up and routine maintenance).