Cooling Fan Relay

INSPECTION
1. REMOVE RELAY BOX COVER
2. INSPECT NO.1 COOLING FAN RELAY





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





b. 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.





c. 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.
d. Reinstall the No.1 cooling fan relay.
3. INSPECT NO.2 COOLING FAN RELAY





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





b. 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.





c. 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.
d. Reinstall the No.2 cooling fan relay.
4. INSPECT NO.3 COOLING FAN RELAY





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





b. 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.





c. 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.
d. Reinstall the No.3 cooling fan relay.
5. REINSTALL RELAY BOX COVER