Miller Smart Fan User manual

Smart Fan Installation
Toll Free 855 269 8863
PO Box 16039 Sumas Mt PO, Abbotsford, BC V3G 0C6
www.millerperformancecars.com

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Table of Contents
1. General Information........................................................................................................ 4
1.1 Introduction............................................................................................................... 4
1.2 Smart Fan Description .............................................................................................. 4
1.3 Parts Included ........................................................................................................... 4
1.4 Tools Required.......................................................................................................... 5
1.5 Safety and Precautions.............................................................................................. 5
2. Installation....................................................................................................................... 6
2.1 Clutch Fan Removal ................................................................................................. 6
2.2 Radiator Removal..................................................................................................... 7
2.3 Electric Fan Placement ........................................................................................... 11
2.4 Installing Wiring Harness....................................................................................... 12
3. Reassembly................................................................................................................... 14
3.1 Installation of Software........................................................................................... 14
3.2 Reinstall Radiator Assembly .................................................................................. 15
3.3 Bleeding Your Coolant System .............................................................................. 15
4. Drive Your Vehicle....................................................................................................... 16
4.1 Initial Driving ......................................................................................................... 16
4.2 Trouble Shooting .................................................................................................... 16
4.3 Notes....................................................................................................................... 17

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Limited Lifetime Warranty
Miller Performance Ltd. warrants that products manufactured by Miller Performance Ltd will be free from
defects in materials and workmanship for the life that you own your vehicle. If any such product proves
defective during the applicable warranty period, Miller Performance Ltd., at its option, either will repair the defective
product with charge for parts and labor or will provide a replacement in exchange for the defective product. Items
not manufactured by Miller Performance Ltd. have a limited warranty of one year past the date of purchase.
In order to obtain service under this warranty, the customer must notify Miller Performance Ltd. of the defect before
the expiration of the warranty period and make suitable arrangements for the performance of service. In all cases the
customer will be responsible for packaging and shipping the defective product back to the service center specified by
Miller Performance Ltd., with shipping charges prepaid. Miller Performance Ltd. shall pay for the return of the product
to the customer if the shipment is within North America, otherwise the customer shall be responsible for all shipping
charges, insurance, duties and taxes, if the product is returned to any other location.
This warranty shall not apply to any defect, failure or damage caused by improper use or failure to observe proper
operating procedures per the product specification or operators manual or improper or inadequate maintenance and
care. Miller Performance Ltd. shall not be obligated to furnish service under this warranty 1) to repair damage resulting
from attempts by personnel other than Miller Performance Ltd’s. representatives to repair or service the product; 2) to
repair damage resulting from improper use or connection to incompatible equipment; 3) to repair damage resulting
from operation outside of the operating or environmental specifications of the product.
MILLER PERFORMANCE LTD. LIABILITY FOR THE MERCHANTABILITY AND USE OF THE PRODUCT IS
EXPRESSLY LIMITED TO ITS WARRANTY SET OUT ABOVE. THIS DISCLAIMER AND LIMITED
WARRANTY IS EXPRESSLY IN LIEU OF ANY AND ALL REPRESENTATIONS AND WARRANTIES
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF
MERCHANTABILITY OR OF FITNESS FOR PARTICULAR PURPOSE, WHETHER ARISING FROM
STATUTE, COMMON LAW, CUSTOM OR OTHERWISE. THE REMEDY SET FORTH IN THIS DISCLAIMER
AND LIMITED WARRANTY SHALL BE THE EXCLUSIVE REMEDIES AVAILABLE TO ANY PERSON.
MILLER PERFORMANCE LTD. SHALL NOT BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT,
INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE USE OF THIS PRODUCT OR
CAUSED BY THE DEFECT, FAILURE OR MALFUNCTION OF THIS PRODUCT, NOR ANY OTHER LOSSES
OR INJURIES, WHETHER A CLAIM FOR SUCH DAMAGES, LOSSES OR INJURIES IS BASED UPON
WARRANTY, CONTRACT, NEGLIGENCE, OR OTHERWISE. BY ACCEPTING DELIVERY OF THIS
PRODUCT, THE PURCHASER EXPRESSLY WAIVES ALL OTHER SUCH POSSIBLE WARRANTIES,
LIABILITIES AND REMEDIES. MILLER PERFORMANCE LTD. AND PURCHASER EXPRESSLY AGREE
THAT THE SALE HEREUNDER IS FOR COMMERCIAL OR INDUSTRIAL USE ONLY AND NOT FOR
CONSUMER USES AS DEFINED BY THE MAGNUSOM-MOSS WARRANTY ACT OR SIMILAR STATE
CONSUMER WARRANTY STATUTE

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1. General Information
1.1 Introduction
The Miller Smart Fan is a great way to take cooling and control of it to the next level! Let
your ECU determine when the fan needs to be triggered, increase horsepower by
removing the clutch fan. Have control of something you didn’t have control over before!
This manual will guide you through the quick installation of the Smart Fan.
1.2 Smart Fan Description
The Miller Smart Fan features the following:
•Easy to install wiring harness
•High CFM 16” Electric Fan
•ECU Controlled operation
•Improved engine performance
1.3 Parts Included
Part Number
Description
Quantity
MPC-SFK-0100
Miller Smart Fan Harness
1
MPC-PWF-150
16” High CFM Fan
1
MPC-SFT-20XX
Smart Fan software
1

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1.4 Tools Required
The Following tools and supplies (not included) or similar tools and supplies are required
for fast and proper installation of this Miller Performance product:
Minimum requirements:
-Flathead Screwdriver
-Philips Screwdriver
-Various socket wrenches
-Various Box Wrenches
-Coolant Catch Pan
-Soldering Iron
-Solder
1.5 Safety and Precautions
Warning:
Ensure vehicle cannot roll when working on the vehicle
Warning:
Disconnect the ground strap (negative) whenever doing work
on electrical or fuel systems.
Warning:
Never run the engine unless the work area is well ventilated.
Carbon monoxide kills!
Caution:
Before starting each procedure, ensure that you have all the necessary
tools and parts on hand. Read all instructions thoroughly; do not
attempt shortcuts use only parts and materials that are included in this
kit or approved by Miller Performance.
Caution:
Be careful when using soldering iron. Temperatures can be in excess of
400 degrees and burns can be serious.

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2. Installation
2.1 Clutch Fan Removal
IF YOU ALREADY HAVE AN E-FAN INSTALLED SKIP THIS SECTION AND
GO TO SECTION 2.4
In order to install your Miller Smart Fan you will need to remove the factory clutch fan as
well as the radiator. Removing the radiator make the installation much easier and also is a
good opportunity to do a coolant flush.
1. Remove clutch Fan. The clutch fan is a reverse thread, using a long wrench in a
quick motion; you will want to “crack” loose the threads. After you have loosened
the clutch fan simply spin it off with your hand.
Figure 1: Crack Threads loose
Figure 2: Spin Fan off by hand

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Figure 3: Remove Clutch Fan Carefully
2. After you have removed the clutch fan successfully, you are now ready to remove
the radiator.
2.2 Radiator Removal
Removing the radiator will make installation much easier.
1. Remove all 3 hoses from the radiator and let the coolant drain into a catch basin.
There is a radiator drain plug on the bottom driver’s side. There are two hoses on
the top Drivers side, and one on the bottom passenger side.
Figure 4: E34 Radiator

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Figure 5: E30 Radiator
Figure 6: Items removed from E30
Figure 7: Coolant draining from radiator

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2. Once you have drained the coolant from the radiator, you can now remove the
radiator. We will illustrate how to remove the radiator for both e30 and e34 cars.
2A. E34 Removal
There are two plastic tabs on either end of the radiator. Taking a flathead screw
driver, you will want to gently pry the tabs back. Be careful not to damage the
tabs, they can break easy if manhandled too much.
Figure 8: Removing Tab
Figure 9: Tab Removed

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2b. E30 Removal
There is a plastic brace on the top of the radiator that secures it in place. Simply
remove the two screws that hold this braket in place and the radiator will be able
to be pulled out.
Figure 10: E30 radiator brace
3. Make sure you unplug any sensors that are on the side of the rad. The radiator will
now be able to be lifted out. Be careful as there may still be some coolant in the
radiator.
Figure 11: E34 Radiator removed

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2.3 Electric Fan Placement
The placement of the E-Fan on the radiator may vary, but we suggest these locations for
best fitment. The actual fixing of the fan to the radiator is to be done outside of the engine
bay for ease of installation. Be sure to confirm fitment before completely reinstalling
everything.
E34 Placement
On the E34 radiator you will have enough room to place the fan anywhere really. We
suggest putting the fan on either end of the radiator but not in the middle.
Figure 12: E34 Fan Placement
E30 Placement
On the E30 room fan placement is a little more crucial. Placing it on the driver’s side of
the radiator just a few “rows” down from the top. This should fit just perfect once the rad
is back in the engine bay. Confirm this before you secure the radiator in place.
Figure 13: E30 Fan Placement.

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You are now ready to fasten the fan to the rad. Refer to the mounting instructions on
sheet of paper included in the fan box.
A. Mark the hold for the fan
mounts with a marker.
B. Pass a small Phillips screwdriver
through the marked holes
CAREFRULLY spreading the
fins to allow easy passage for
the nylon bolts. Fit the bolts
through the mounting tabs and
pass them through the holes in
the rad.
C. Push the speed nut on until snug
D. Cut off the remaining bolts
leaving about a 1/4" sticking out.
2.4 Installing Wiring Harness
Take the Smart Fan wiring harness and unravel it. You will notice three “ends” to the
harness.
1. Disconnect your battery if you haven’t already.
2. Unplug the charcoal canister solenoid valve. The smart fan harness will plug into
that plug. You will see there is only one plug it will fit on our harness.
3. Plug the fan plug on our harness into the Fans connector
4. Take the eyelet connectors and attach them to the starter. Black goes to
NEGATIVE (-) and red goes to the POSITIVE (+) terminal on the starter.

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If you already had an electric fan…
1. Take the wiring from your current electric fan and remove it.
2. The wiring loom from the electric fan needs to be modified.
3. Take the supplied 2 pin male connector and fasten it to the wires. Make sure you
orient the wires correctly for proper fan direction and flow.
4. After you have soldered the male pins to the wires, insert them into the Male
connector. You have now modified your existing electric fan.
Be Creative with how you mount/route the wiring harness. Here is an example of
mounting it by the relay.

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3. Reassembly
3.1 Installation of Software
Before you can begin using your smart fan be sure that your smart fan tune is installed.
You may have purchased a MAF conversion with your smart fan, or a W.A.R. Chip.
Either way, make sure you are using the software that came with the Smart Fan to ensure
it operate properly.
If you have a WAR Chip, load the WAR Chip with the file that was provided to you.
1. For e34 the ECU in the E-box on the passenger side of the engine bay (Upper
Side). Using a Philips screwdriver undo the four screws.
For E30’s open the glove box and remove plastic cover to expose the ECU
located on the top of the glove box compartment.
2. Now the ECU will be exposed. Using a 10mm socket wrench, undo the two
10mm nuts.
3. Unplug the ECU from its connector harness.
The Chip contains the software required for your vehicle to operate. Avoid high static
areas. Also avoid dropping the chip and spilling liquids on it.
4. You need to take the metal case off of the ECU. There are tabs all the way around
the bottom side. Using a small flat screwdriver gently lift up the tabs to release the
ECU. Be careful not to bend the tabs too far as they may break.
5. Once you have the ECU open and the chip side exposed you are ready to replace
your current chip. Carefully pry evenly on each side of the chip back and forth
until it is free from its holder.
6. Take the chip that came with your Smart Fan and install it in place of the original
one. Make sure that you align the small notch (half circle) on the chip, to the
small notch on the ECU; this will insure your chip is installed properly.
You have successfully completed all steps required for the ECU. You can now
reassemble the ECU and glove box or E-box. You can now reconnect the battery.

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3.2 Reinstall Radiator Assembly
With the fan attached to the radiator carefully slip it back into place. Make sure that if
your radiator has rubber “foot pads” that they line up with their respective holes or
holders on the rad-support.
Check to make sure that the smart fan will fit and not interfere with any pulleys and make
sure that you reconnect the hoses, and plug in any sensors you removed. Fill the coolant
system with coolant.
3.3 Bleeding Your Coolant System
1. Loosen the bleeder screw, which is on top of the thermostat housing assembly, by
turning it counterclockwise with the screwdriver. The coolant will flow out of the
housing without the engine on.
2. Tighten the bleeder screw by turning it clockwise when you no longer see air
bubbles coming out of the screw.
3. Set the heat temperature on the interior heat controls to the hottest setting, and set
the fan to the highest speed. Start the engine and let the car run.
4. Open the cap on the coolant reservoir tank by turning the cap counterclockwise
and pulling it off the tank. Watch the coolant level, indicated by the marks on the
side of the tank, and pour in more coolant if the level drops below the lower mark.
5. Open the bleeder screw again once the car has reached normal operating
temperature. Then tighten the screw after there are no more air bubbles coming
out around the screw. Check the coolant level in the reservoir tank periodically,
and refill it to the upper mark on the tank as needed.
6. Repeat Step 5 until all of the air is out of the radiator and cooling system. You
may need to repeat the process five or six times to fully bleed the system. Turn off
the car.
Make sure your coolant system is completely bled. You risk overheating if you have any
air pockets in the system. When bleeding, always keep an eye on your coolant
temperature gauge to make sure you don’t over heat while bleeding.

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4. Drive Your Vehicle
4.1 Initial Driving
Remember to connect you battery before you start your vehicle. Also remember to bleed
your coolant system. Once you have done this you will be ready to test your newly
installed Smart Fan.
**Note: When you unplug your ECU it loses its “memory” and the car may drive rough
for the first few minutes. Drive the car around for ten minutes and the car should be
running smoothly again.
Keep an eye on your coolant gauge to ensure you bled the system adequately. You should
see your smart fan cycling on and off at various speeds based on your coolant
temperature!
4.2 Trouble Shooting
If you are experiencing problems with your smart fan operation please check the
following:
1. Ensure all your wiring was installed correctly.
2. Ensure you installed the proper software.
3. Ensure the Fan is plugged in.
If you cannot resolve the problem please phone us and we will help walk you through a
solution. You can reach us at our toll free number, 855 269 8863. We will not let you go
unsatisfied.

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4.3 Notes
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Published August 1, 2009 by, Brody Saari; Photos taken by: Brody Saari, Copyright 2009 All rights reserved. Any
unauthorized reproduction of this document or any part of, for use other than that of original owners’ application is prohibited.
Miller Performance Ltd. 2013
209BNSU09.3.ASD93.10