Radiator Cooling Fan Motor Relay: Testing and Inspection
INSPECTION1. 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.