Radiator Cooling Fan Motor Relay: Testing and Inspection

INSPECTION
1. INSPECT NO. 1 COOLING FAN RELAY
a. Remove the relay box cover.





b. Remove the No. 1 cooling fan relay (Marking: FAN NO.1).





c. Inspect the No. 1 cooling fan relay continuity.
1) Using an ohmmeter, check that there is continuity between terminals 1 and
If there is no continuity, replace the relay.
2) Check that there is no continuity between terminals 3 and 5.
If there is continuity, replace the relay.





d. Inspect the No. 1 cooling fan relay operation.
1) Apply battery positive voltage to terminals 1 and 2.
2) Using an ohmmeter, check that there is continuity between terminals 3 and
If there is continuity, replace the relay.
e. Reinstall the No. 1 cooling fan relay.
f. Reinstall the relay box cover.
2. INSPECT NO. 2 COOLING FAN RELAY
a. Remove the relay box cover.





b. Remove the No. 2 cooling fan relay (Marking: FAN NO.2).





c. Inspect the No. 2 cooling fan relay continuity.
1) Using an ohmmeter, check that there is continuity between terminals 1 and 2.
If there is no continuity, replace the relay.
2) Check that there is continuity between terminals 3 and 4.
If there is no continuity, replace the relay.
3) Check that there is no continuity between terminals 3 and 5.
If there is continuity. replace the relay.





d. Inspect the No. 2 cooling fan relay operation.
1) Apply battery positive voltage to terminals 1 and 2.
2) Using an ohmmeter, check that there is no continuity between terminals 3 and 4.
If there is continuity, replace the relay.
3) Using an ohmmeter, check that there is continuity between terminals 3 and 5.
If there is no continuity, replace the relay.
e. Reinstall the No. 2 cooling fan relay.
f. Reinstall the relay box cover.
3. INSPECT NO. 3 COOLING FAN RELAY





a. Remove the relay box cover.
b. Remove the No. 3 cooling fan relay (Marking: FAN NO.3).





c. Inspect the No. 3 cooling fan relay continuity.
1) Using an ohmmeter, check that there is continuity between terminals 1 and 2.
If there is no continuity, replace the relay.
2) Check that there is no continuity between terminals 3 and 5.
If there is continuity, replace the relay.





d. Inspect the No. 3 cooling fan relay operation.
1) Apply battery positive voltage to terminals 1 and 2.
2) Using an ohmmeter, check that there is continuity between terminals 3 and 5.
If there is no continuity, replace the relay.
e. Reinstall the No. 3 cooling fan relay.
f. Reinstall the relay box cover.