Radiator cooling fan (w/o A/C)¶

System circuit¶

Turn ignition switch "ON".

Check that the cooling fan stops.

If not, check the cooling fan relays and water temperature switch, and check for a separated connector or severed wire between the cooling fan relay and water temperature switch.
Disconnect water temperature switch connector.

Check that the cooling fan rotates.

If not, check the fan main relay, cooling fan relays, cooling fan and fuses, and check for a short circuit between the cooling fan relay and water temperature switch.
Connect water temperature switch connector.

Start engine.
1. Raise coolant temperature to above 93°C (199°F).
2. Check that the cooling fan rotates.
If not, replace the water temperature switch.

Inspect fan main relay ("FAN MAIN"). (See Ignition main relay "IGN")

Check the relay in the same way as the Ignition Main Relay.
Inspect No.1 cooling fan relay ("FAN NO.1"). (See Radiator cooling fans (w/ A/C) › Inspection of radiator cooling fan components)
Inspect radiator water temperature switch.
1. Using an ohmmeter, check that there is no continuity between the terminals when the coolant temperature is above 93°C (199°F).
2. Using an ohmmeter, check that there is continuity between the terminals when the coolant temperature is below 83°C (181°F).
If continuity is not as specified, replace the switch.
Inspect No.1 radiator cooling fan.
1. Connect battery and ammeter to the cooling fan connector.
2. Check that the cooling fan rotates smoothly, and check the reading on the ammeter.
Standard amperage:
- M/T – 5.8 – 7.4 A
- A/T – 8.8 – 10.8 A