Cooling Fan Relay(s)

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. (DENSO)
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. (DENSO)
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. Inspect the No.1 cooling fan relay continuity. (BOSCH)
1. Using an ohmmeter, check that there is continuity between terminals 85 and 86.
If there is no continuity, replace the relay.
2. Check that there is continuity between terminals 30 and 87a.
If there is no continuity, replace the relay.





e. Inspect the No.1 cooling fan relay operation. (BOSCH)
1. Apply battery positive voltage across terminals 85 and 86.
2. Using an ohmmeter, check that there is no continuity between terminals 30 and 87a.
If there is continuity, replace the relay.
f. Install 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. Using an ohmmeter, check that there is continuity between terminals 3 and 5.
If there is no continuity, replace the relay.
d. Install 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. Install the No.3 cooling fan relay.


CONTINUITY







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







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







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