Directed Electronics Vehicle Security System 3901V User manual

Model
3901V/3902V/3903V
Installation Guide
NOTE: This product is intended for installation by a profes-
sional installer only! Any attempt to install this product by any
person other than a trained professional may result in severe
damage to a vehicle’s electrical system and components.
© 2007 Directed Electronics, Vista, CA
N3901V 2007-09

Bitwriter®, Code Hopping™, Doubleguard®, ESP™, FailSafe®, Ghost
Switch™, Learn Routine™, Nite-Lite®, Nuisance Prevention® Circuitry,
Revenger®, Silent Mode™, Soft Chirp®, Stinger®, Valet®, Vehicle
Recovery System®, VRS®, and Warn Away® are all Trademarks or
Registered Trademarks of Directed Electronics.
The Bitwriter®(p/n 998T)
requires chip version 2.5 or
newer to program this unit.

Table of contents
What is included.............................................5
Control module diagram....................................5
Installationpointstoremember........................6
Before beginning the installation......................6
After the installation.......................................7
Tools required.................................................7
Deciding on component locations...................8
Control module...............................................8
Integrated LED/Valet® switch............................9
Starter kill relay..............................................9
Connecting your wires..................................10
Obtaining constant 12V..................................10
Finding a light wire........................................11
Main harness wire connection guide..............12
CAN harness................................................15
CAN harness wiring guide................................15
Plug-in harness...........................................16
Integrated LED/Valet®...................................16
Data port - Bitwriter®....................................16
Data port - Bootloader...................................16
Four-pin optional sensor harness......................17
On-board dual stage shock sensor..................18
Zones..........................................................18
Longterm event history...................................19
Rapid resume logic.........................................19
Multi-level secuity arming............................20
Feature programming...................................21
To access feature programming........................21
Feature menus..........................................22-23
Bitwriter® features.........................................23
Features description...............................24-26
Special features.............................................28
Vehicle Appplication Charts.....................29-33
Wiring quick reference guide..................34

5
What Is Included
■฀The control module
■฀9-pin main harness
■฀4-pin sensor harness
■฀LED/VALET switch
■3-pin CAN(control area network) harness
Control Module
SHOCK SENSOR
ADJUSTMENT
9-PIN
MAIN
HARNESS
DAT A PORT
BITWRITER®
(ESP2)
CAN HARNESS
DAT A PORT
BOOT LOADER
OPTIONAL SENSOR
INPUT
LED/VALET® SWITCH

© 2007 Directed Electronics—all rights reserved
6
IMPORTANT! Before you begin the install process ensure the hardware
matches the vehicle and verify the wires needed.
Installation points to remember
This product represents many years of research and development. It is very sophisticated and should be
installed by experienced security installers only. Please do not attempt installation of this product without
reading this guide.
This product is not intended for consumer installation and will have NO WARRANTY unless it is installed
by an authorized dealer. Do not disconnect the battery if the vehicle has an anti-theft coded radio. If
equipped with an airbag, avoid disconnecting the battery if possible.
IMPORTANT! Please read this entire installation guide before beginning the
installation. The installation of this security system requires interfacing with
many of the vehicle’s systems. Many new vehicles use low-voltage or mul-
tiplexed systems which can be damaged by low resistance testing devices,
such as test lights or logic probes. Test all circuits with a high-quality digital
multi-meter before making the connections.
IMPORTANT! Many airbag systems will display a diagnostic code through
Their warning light after they lose power. Disconnecting the battery requires
this code to be erased, a procedure that can require a trip to the dealer.
Before beginning the installation
■Check with the customer to determine the LED and Valet switch locations.
■Roll down a window to avoid being locked out of the car.
WARNING: Before beginning your install go to www.XPRESSVIP.com and be sure to print the
LATEST corresponding installation manual for the firmware that is flashed to the platform
you are using.

© 2007 Directed Electronics—all rights reserved 7
After the installation
■Test all functions. The “Using Your System” section of the Owner's Guide is very helpful when testing.
■When testing, don’t forget that this system is equipped with Nuisance Prevention® Circuitry (NPC). NPC
can bypass both sensor zones, making them appear to stop working.
■฀Carefully reassemble the under-dash trim panels.
■฀Inspect the engine compartment for tools that may have been left behind.
Tools required
This is a general list of tools required to complete the installation of this security system for most vehicles.
Some vehicles may require additinal tools.
■฀Digital multi-meter
■฀Nutdriver and/or socket set
■฀Wire cutters/strippers
■฀Panel removal tool
■฀Solderless terminal crimpers
■฀Drill bit set
■฀Cordless power drill
■฀Phillips head screwdriver
■฀Torx driver set - Work light

8
Deciding on component locations
Control module
Some things to remember about where to mount the control module
■Never put the control module in the engine compartment!
■The first step in wiring a vehicle is removing the driver's side under-dash panel to access the starter
and ignition wires. If the control module is placed just behind the driver's side dash it can easily be
disconnected.
■When mounting the control module, try to find a secure location that will not require you to extend the
harnesses’ wires (they are 1.5 meters long). Keep it away from the heater core (or any other heat sources)
and any obvious leaks.
■Some good control module locations are: Above the glove box, inside the center console, above the
under-dash fuse box, or above the radio.

© 2007 Directed Electronics—all rights reserved 9
Integrated LED/Valet switch
Things to remember when positioning the integrated LED/Valet switch:
■It should be visible from both sides and the rear of the vehicle, if possible.
■It needs at least 1-1/2 inch clearance to the rear.
■It is easiest to remove a small panel, such as a switch blank or a dash bezel, before drilling a 5/16
inch hole.
Starter kill relay
If the Starter kill relay or its connections are immediately visible when removing the underdash panel, they
can easily be bypassed. Always make the relay and its connections difficult to discern from the factory
wiring! Exposed yellow butt connectors do not look like factory parts, and will not fool anyone! For this
reason, routing the starter kill wires away from the steering column is recommended.

© 2007 Directed Electronics—all rights reserved
10
Connecting your wires
Now that you have decided where each component will be located, you’re going to find the wires in the
car that the security system connects to.
IMPORTANT! Do not use a 12V test light to find these wires! Use a digital multimeter for all testing
described in this manual.
Obtaining constant 12V
We recommend two possible sources for 12V constant: the (+) 12v terminal of the battery, or the constant
supply to the ignition switch. If you connect the module to the CAN bus wire at the OBD II plug, you can
use the +12 v wire existent in the plug. Always install a fuse within 12 inches of this connection.
IMPORTANT! Do not remove the fuse holder on the red (N1/3)wire. It ensures that the control module
has its own fuse, of the proper value, regardless of how many accessories are added to the main power feed.

11
Finding a light wire
Find a (-) parking light wire
Use the following procedure to find a (-) parking light flash wire with your multimeter:
1. Set to DCV or DV voltage (12V or 20V).
2. Attach the (+) probe of the meter to a fused (+) source.
3. Probe the wire you suspect of being the parking light wire. Usually, the area near the headlight/
parking light switch is an excellent area to start, as is the kick panel. Refer to the directechs.com for
specific vehicle information.
4. Turn on the parking lights. If your meter shows 12V, turn off the parking lights and make sure it goes
back to zero.
5. If it does return to zero, turn the parking lights back on and, using the dash light dimmer control, turn
the brightness of the dash lights up and down. If the meter changes more than a volt when using the
dimmer, look for another wire. If it stays relatively close to 12V, you have found your parking light wire.

© 2007 Directed Electronics—all rights reserved
12
Main harness wire connection guide
N1/1 RED (+) 12V Constant Power
N1/2 BLACK (-) Chassis Ground Input
N1/3 RED/WHITE (-) 200mA Auxillary Channel Output
N1/4 BLUE (-) Instant Trigger Input
N1/5 ORANGE (-) Ground While Armed Output
N1/6 WHITE (-) Light Flash Output
N1/7 BROWN (+) Siren Output
N1/8 BLUE/WHITE (-) Status/shunt Input
N1/9 BROWN/WHITE (-) 200 mA Horn Output
N1/1 RED – (+) 12V constant power input: Before connecting this wire, remove the supplied fuse.
Connect to the battery positive terminal or the constant 12V supply to the ignition switch.
NOTE: Always use a fuse within 12 inches of the point you obtain(+)12V. Do not use the supplied fuse in
the harness for this purpose. This fuse protects the module itself.
N1/2 BLACK - (-) chassis ground connection: Attach this wire to the kick panel or firewall. There
should be no paint, and no factory grounds. Do not use under dash bracing or steering columns as ground
points.

© 2007 Directed Electronics—all rights reserved 13
N1/3 RED/WHITE – (-) 200mA auxiliary channel: If programmed for an auxiliary output, this wire will
provide a (-) pulse when the lock button is pressed twice between 3 and 7 seconds. This output can be
used to control optional accessories (see programming features).
IMPORTANT! Never use this wire to drive anything but a relay or a low-current input! This transistorized
output can only supply (-) 200mA and connecting directly to a solenoid, motor or other high current device
will cause the module to fall.
N1/4 BLUE – (-) Instant trigger: This input will respond to a negative input with an instant trigger.
Connect this wire to a pin switch for those vehicles that do not have hood status on the CAN Bus. (Check
this on vehicle application list or on the website).
N1/5 ORANGE – (-) 500mA ground-when-armed output: This wire supplies a (-) 500mA ground as long
as the system is armed. This output ceases as soon as the system is disarmed. This wire controls operation
of the pre-wired starter-kill and can be used to control other optional accessories.
NOTE: If connecting the orange wire to control another module, such as 529T or 530T window controller, a
1 amp diode (type 1N4004) will be required. Insert the diode as shown bellow.
Yellow to
(+) ignition source
N1/6 WHITE – 200mA (-) light flash output: Connect this wire to the light wire (parking light or hazard)
of the vehicle. It will supply a (-) 200mA output. If a positive output is needed use this output to drive
a relay. This output is to be used only for vehicles that do not have lights signals on the CAN Bus. (Check
this on vehicle application list or on the website).
IMPORTANT! Never use this wire to drive anything but a relay or a low-current input! This transistorized
output can only supply (-) 200mA and connecting directly to a high current device will cause the module
to fail.

© 2007 Directed Electronics—all rights reserved
14
•
(+) 12v CONSTANT FUSED
(+) 12v PARKING LIGHT OUTPUT
N1/6 WHITE (-) LIGHT FLASH
OUTPUT from system
(+) 12v CONSTA NT FUSED
(+) Parking light relay - Wiring instructions if a positive parking light output is needed
N1/7 BROWN – (+) siren output: Connect this wire to the RED one from the siren. Connect the BLACK
wire from the siren to (-) chassis ground, preferably at the same point you connect the control module’s
BLACK ground wire.
N1/8 BLUE/WHITE– (-) Status/shunt input: Remote Start Input - Connect this input to the Remote
Start Status Output of a remote start module (if used) when the ignition and sensors need to be bypassed
during remote start active status.

15
N1/9 BROWN/WHITE – 200mA (-) Horn honk output: This wire supplies a 200mA (-) output that can be
used to honk the vehicle’s horn. It provides a pulsed output when the security system is armed/disarmed
and in trigger sequence or in panic mode. In most vehicles with (-) horn circuits this wire can control the
vehicle’s horn without adding a relay. If the vehicle has a (+) horn circuit, an optional relay must be used
to interface with the vehicle’s horn circuit.
IMPORTANT! Never use this wire to drive anything but a relay or a low-current input! This tran-
sistorized output can only supply (-) 200mA and connecting directly to a solenoid, motor or other
high current device will cause the module to fall.
N1/9 BROWN/WHITE
CAN harness
CAN Harness connection diagram
N7/1 LIGHT GREEN SW CAN BUS
N7/2 ORANGE/GREEN (BROWN/RED) CAN BUS (high) FT (HS)
N7/3 ORANGE/BROWN (BROWN/BLACK) CAN BUS (low) FT (HS)
N7/1 LT GREEN – SW CAN bus (present only in Single Wire CAN Security Systems 3902V)
Connect this wire to the vehicle CAN wire. (Check for color and location on the vehicle application list or
on the website).
N7/2 - ORANGE/GREEN or BROWN/RED – FT CAN Bus High or HS CAN bus High (present only in Fault
Tolerant/High Speed CAN Security Systems such as 3901V for FT and 3903V for HS, respectively.)
Connect this wire to the vehicle CAN High wire. (Check for color and location on the vehicle application
list or on the website).

16
N7/3 ORANGE/BROWN or BROWN/BLACK – FT CAN Bus Low or HS CAN bus Low (present only in Fault
Tolerant or High Speed CAN Security Systems such as 3901V for FT and 3903V for HS, respectively.)
Connect this wire to the vehicle CAN Low wire. (Check for color and location on the vehicle application
list or on the website).
Plug-in harnesses
Integrated LED/VALET®/switch, 2-pin BLUE and 2-pin White plugs
The integrated LED VALET®/switch should be accessible from the driver’s seat. The VALET® part of the
switch plugs into the BLUE port on the side of the unit. Check for rear clearance before drilling a
5/16 -inch hole and mounting the swicth. The LED part of the swicth operates a 2V DC and plugs into the
white port on the side of the unit. Make sure the LED wires are not shorted to ground as the LED will be
damaged.
GRAY
BLACK
WHITE
BLUE
Data port-Bitwriter
The black three-pin port can be used for programming the unit using the Directed Bitwriter, a hand held
programming tool. The Bitwriter also allows programming of the features that are not available in the
features menus.

© 2007 Directed Electronics—all rights reserved 17
Data port – Bootloader
The white four-pin port is use to connect USB Bootloader adaptor and computer to download and flash
vehicle specific firmware. A dedicated software has to be install on your computer that can be downloaded
free of charge from the Directed Accessories web site www.expresskit.com.
Four-pin optional sensor harness
RED wire
The red wire supplies constant power to the optional sensor.
BLACK wire
The black wire supplies ground to the optional sensor.
BLUE, GREEN wires
The blue and green wires are multiplex inputs. They are both tied to the same zone. If an input of less than
0.8 seconds is supplied to either wire the Warn-Away response will occur. An input longer than 0.8 seconds
to either wire will initiate the triggered sequence and report zone 4. This port can be used for optional
sensors such as: the 506T – glass breakage sensor, or the 504D – field disturbance sensor.

© 2007 Directed Electronics—all rights reserved
18
On-board dual stage shock sensor
Less Sensitive More Sensitive
There is a dual-stage shock sensor inside the control module. Adjustments are made via the rotary control
as indicated above. Since the shock sensor does not work well when mounted firmly to metal, we recom-
mend against screwing down the control module. The full trigger of the on-board shock sensor reports
zone 2. See Table of Zones.
NOTE: When adjusting the sensor, it must be in the same mounting location that it will be after the
install is completed. Adjusting the sensor and than relocating the module requires readjustment.
Zones
Zone number Trigger Type Input Description
1 Instant Trigger Hood and/or trunk switches (detected on the
vehicle’s CAN bus).
2 Multiplex Input Heavy impact from on-board Doubleguard
shock sensor.
3 Two-Stage, progressing from
warning to full alarm
Door switch (detected on the vehicle’s CAN
bus)
4 Multiplex Optional sensor port. Inputs shorter than 0.8
seconds will trigger Warn Away® response,
while inputs longer than 0.8 seconds will
instantly trigger full alarm sequence
5 Instant Trigger Ignition input (detected on the vehicle’s CAN
bus)
6 Instant Trigger BLUE N1/4 (-) input
Note: The Warn Away® response does not report on the LED

© 2007 Directed Electronics—all rights reserved 19
Long-term event history
The control module will store the last two triggers in memory that are not erased when the ignition is
turned on. This can be helpful for troubleshooting false alarm reports. To access the event history use the
following procedure:
1. Turn the ignition switch off and press and hold the integrated LED/VALET® button.
2. While holding the integrated LED/VALET® button turn the ignition On.
3. Release the integrated LED/VALET® button.
4. Within 5 seconds press and release the integrated LED/VALET® button.
The LED will flash in groups indicating the last two zones reported triggered. For example, if zone 2 and
3 were the last two zones to be triggered the LED will flash two times followed by a pause and than flash
three times followed by a pause.
NOTE: The Warn-Away response does not report on the LED.
The Long Term Event History will exit if the ignition is turned off or there is no activity for 60 seconds.
Rapid resume logic
The current state of the alarm will be stored in non-volatile memory. If power is lost and then reconnected,
the system will recall the stored state from memory. This applies to all states of the system including arm,
disarm, and VALET® mode. If the unit was powered down while triggered, the control unit will continue to
sound the siren (honk the horn) after power up until the unit is recognizing the vehicle again. If at least
one zone is still active after this, the unit will sound the siren/horn cycle three times, if not disarmed in
the meantime. If no zone is active after the vehicle was recognized, the siren will stop after one siren/horn
cycle, if not disarmed in the meantime.
NOTE: The unit will not sound the siren (honk the horn) after power up, if the panic mode was active
when powered down.

© 2007 Directed Electronics—all rights reserved
20
Multi-level security arming
Multi-Level Security Arming allows the user to select sensors to be active or bypassed when the system is
armed. Multi-Level Security Arming can only be accessed if the function is set ON (option 3-2)
By pressing the LOCK button more than once within 3 and 7 seconds of arming the system activates Multi-
Level Security Arming. If the LOCK button is pressed again the unit cancels the bypass of the sensors. There
are different security levels which can be selected, as follows:
Step Lock Button pressed Number of Siren/Horn
Chirps
Armed State with Zone
Bypassed
1 Once 1 Chirp No Zone Bypassed
2 Twice 3 Chirps, 3 flashses Zone 2 & 4 Bypassed
3 If the Lock button is pressed again anytime, the system will return to step 1.
The user can repeat the steps provided the LOCK button is pressed between
3 and 7 seconds and no other buttons are pressed.
Disarming without the original vehicle remote (system override)
This feature allows you to override the system without the transmitter should it be lost, damaged or
disabled. To do this, you must have the vehicle’s ignition key and know where the integrated LED/VALET®
switch is located.
Turn the ignition to the “run” position. Press and release the integrated LED/VALET® switch the programmed
number of time (1-5), within 10 seconds. After a few seconds the LED will stop flashing and the vehicle
should start. If it does not, you may have waited too long. Turn the ignition off and try again.