Engine Electrical System

Diagnostic trouble code: P0480 “Malfunction in control circuit of relay of A/C
condenser fan A”
Item
No.
Operation procedure
Inspection
results
Follow-up procedure
1
Connect the diagnostic tester and
adaptor, and turn the ignition switch to
“OFF” position.
Proceed to next step.
Yes Proceed to Step 4
2
Pull out the relay of A/C condenser
fan, turn the ignition switch to “ON”
position and verify that the voltage
between the power supply terminal of
the relay (i.e. 30# and 85# pins of the
relay) and the negative grid of power
supply is about 12V.
No Proceed to next step.
Yes
Repair or replace the
wiring harness. 3
Verify that the power supply circuit of
the relay of A/C condenser fan is open
or short to ground.
No Proceed to Step 2
Yes Replace the relay.
4
Inspect with multimeter to verify that
the voltage between the control
terminal of relay of A/C condenser fan
(i.e. 86# pin of the relay) and the
negative grid of power supply is about
3.7V.
No Proceed to next step.
Yes
Repair or replace the
wiring harness.
5
Verify that the circuit between the
control terminal of relay (i.e. 86# pin
of the relay) and 50# pin of ECU is
open, or is short to power supply or to
ground.
No
Refer to diagnosis
help.
E-46
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