RADIATOR FAN CONTROL SYSTEM
SYSTEM INSPECTION
Start engine and keep it running to warm it up.
Now check to ensure that radiator fan is started under either follow-
ing condition:
A/C compressor magnet clutch operates (if equipped A/C).
Engine coolant temperature value on scan tool is over 98
5
C
(208
5
F).
If check result is not satisfactory, check RFC relay, wire harness,
ECT sensor, ECM.
WARNING:
Keep hands, tools and clothing away from engine cool-
ing fan to help prevent personal injury. This fan is electric
and can come on whether or not the engine is running.
The fan can start automatically in response to the ECT
sensor with the ignition switch in the “ON” position.
RADIATOR FAN CONTROL RELAY (RFC RELAY)
INSPECTION
1) Disconnect negative cable at battery.
2) Remove RFC relay (1) from its connecter.
3) Check resistance between each two terminals as in table below.
If check results are as specified, proceed to next operation
check. If not, replace.
4) Check that there is continuity between terminals “A” and “B”
when battery is connected to terminals “C” and “D”.
If found defective, replace.
5) Install relay and connect its coupler securely.
ENGIINE AND EMISSION CONTROL SYSTEM
6E1-71
TERMINALS
RESISTANCE
Between “A” and “B”
R
(infinity)
Between “C” and “D”
90 – 110
at 20
5
C (68
5
F)
omron
. .
made
Between “C” and “D”
60 – 88
at 20
5
C (68
5
F)
inter-
. . .
face made