Radiator Cooling Fan Motor Relay: Testing and Inspection

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 no continuity between terminals 3 and 5. If there is 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 continuity between terminals 3 and 5. If there is no 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.
3. Check that there is continuity between terminals 3 and 5. If there is no continuity, replace the relay.
c. 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