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 continuity exists between terminals 1 and 2.
If no continuity exists, replace the relay.
2. Check that no continuity exists between terminals 3 and 5.
If continuity exists, replace the relay.





d. Inspect the No. 1 cooling fan relay operation.
1. Apply battery voltage across terminals 1 and 2.
2. Using an ohmmeter, check that continuity exists between terminals 3 and 5.
If no continuity exists, 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 continuity exists between terminals 1 and 2.
If no continuity exists, replace the relay.
2. Check that continuity exists between terminals 3 and 4.
If no continuity exists, replace the relay.
3. Check that no continuity exists between terminals 3 and 5.
If continuity exists, replace the relay.





d. Inspect the No. 2 cooling fan relay operation.
1. Apply battery voltage across terminals 1 and 2.
2. Using an ohmmeter, check that no continuity exists between terminals 3 and 4. If continuity exists, replace the relay.
3. Using an ohmmeter, check that continuity exists between terminals 3 and 5.
If no continuity exists, replace the relay.
e. Reinstall the No. 2 cooling fan relay.
f. Reinstall the relay box cover.




1. REMOVE COOLING FAN RELAYS NO.1 AND NO.2 FROM ENGINE ROOM RELAY BLOCK.







2. INSPECT NO.1 COOLING FAN RELAY (Marking: FAN1) CONTINUITY.
If continuity is not as specified, replace the relay.







3. INSPECT NO.2 COOLING FAN RELAY (Marking: FAN2) CONTINUITY.
If continuity is not as specified, replace the relay.

4. INSTALL COOLING FAN RELAYS NO.1 AND NO.2 FROM ENGINE ROOM RELAY BLOCK.