Engine General Information and Diagnosis: 1A-252
7
Wire circuit check
1) Disconnect radiator cooling fan motor No.1 connector
with ignition switch turned OFF.
2) Measure resistance between “BLU/YEL” wire terminal of
radiator cooling fan relay No.2 connector and vehicle
body ground.
Is resistance infinity?
Go to Step 8.
“BLU/YEL” wire is
shorted to ground
circuit.
8
Wire circuit check
1) Measure voltage between “BLU/YEL” wire terminal of
radiator cooling fan relay No.2 connector and vehicle
body ground with ignition switch turned ON.
Is voltage 0 V?
Go to Step 9.
“BLU/YEL” wire is
shorted to other circuit.
9
Wire circuit check
1) Measure resistance between “BLU/YEL” wire terminal of
radiator cooling fan relay No.2 connector and radiator
cooling fan motor No.1 connector with ignition switch
turned OFF.
Is resistance below 5
Ω
?
Go to Step 16.
“BLU/YEL” wire is open
circuit.
10
Radiator cooling fan control check
1) Disconnect connector from radiator cooling fan motor
No.2 and connect radiator cooling fan relay No.2 with
ignition switch turned OFF.
2) Run engine until ECT is over 97.5
°
C, 207.5
°
F.
3) Measure voltage between “BLU” wire terminals of
radiator cooling fan motor No.2 connector and vehicle
body ground.
Is voltage 10 – 14 V?
Go to Step 14.
Go to Step 11.
11
Wire circuit check
1) Disconnect radiator cooling fan relay No.2 with ignition
switch turned OFF.
2) Measure resistance between “BLU” wire terminal of
radiator cooling fan relay No.2 connector and vehicle
body ground.
Is resistance infinity?
Go to Step 12.
“BLU” wire is shorted to
ground circuit.
12
Wire circuit check
1) Measure voltage between “BLU” wire terminal of radiator
cooling fan relay No.2 connector and vehicle body
ground with ignition switch turned ON.
Is voltage 0 V?
Go to Step 13.
“BLU” wire is shorted to
other circuit.
13
Wire circuit check
1) Measure resistance between “BLU” wire terminals of
radiator cooling fan relay No.2 connector and radiator
cooling fan motor No.2 connector with ignition switch
turned OFF.
Is resistance below 3
Ω
?
Go to Step 15.
“BLU” wire is open
circuit.
14
Wire circuit check
1) Measure resistance between “BLK” wire terminal of
radiator cooling fan motor No.2 connector and vehicle
body ground with ignition switch turned OFF.
Is resistance below 3
Ω
?
Go to Step 16.
“BLK” wire is open
circuit.
Step
Action
Yes
No
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