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vmr2015-044-006_a
Testing the Radiator Cooling Fan
1. Disconnect radiator cooling fan connector.
vmr2015-029-101_a
1. Cooling fan connector
2. Connect cooling fan connector pin B to a suit-
able 20 A fuse jumper and then directly to the
positive battery post.
3. Connect cooling fan connector pin A (BK wire)
directly to the negative battery post.
4. Check if cooling fan works properly.
– If cooling fan does not work, replace it.
– If cooling fan works properly, refer to
ATOR COOLING FAN TROUBLESHOOTING
CHART
.
5. Reconnect radiator cooling fan connector.
Troubleshooting the Radiator Cooling
Fan
NOTE: The following troubleshooting chart as-
sumes that the engine is operating in the fan
activation temperature range. Refer to
TOR COOLING FAN OPERATION
vmr2016-417
Check FAN fuse (F9)
Bypass fan relay R1
OPERATION TEST
(refer to
COOLING FAN TEST
ELECTRONIC FUEL
RADI-
Check wiring harness
RADIA-
.
Removing the Radiator Cooling Fan
1. Proceed with
cedure in this subsection.
COOLING FAN TROUBLESHOOTING CHART
Is fan working?
YES
NO
YES
Is fuse burnt?
NO
(refer to
RELAY
)
Fan turns?
YES
NO
Apply 12 Vdc
and a ground to
fan connector
RADIATOR
)
Fan turns?
NO
YES
Check CTS
(refer to
INJECTION (EFI)
subsection)
CTS works?
NO
YES
and connectors
(refer to
WIRING
DIAGRAM
)
Harness and
NO
connectors good?
YES
Try a new ECM
RADIATOR REMOVAL
Everything is OK
Replace fuse
Is fan working?
Replace relay
Is fan working?
Replace fan
Is fan working?
Replace CTS
Is fan working?
Repair or replace
defective part(s)
Is fan working?
. See pro-
9
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Table of Contents
Troubleshooting
