Cooling Fan Relay

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 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.





d. Inspect the No. 1 cooling fan relay operation.
(1) Apply battery positive voltage across 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.
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 across 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 across 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.