Radiator Cooling Fan Motor Relay: Testing and Inspection
COOLING FAN RELAYINSPECTION
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.
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