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Fax On Demand Section 5 - Document #115 - Sheet 3 of 6
12. Initializing the AutoCommand
BEFORE THE CAR WILL START FOR THE FIRST TIME, YOU MUST INI-
TIALIZE THE AUTOCOMMAND
®
A.
The AutoCommand
®
requires the installer to open the hood and then
press and hold the brake pedal. Note: The dash lights will come on if the
unit is not initialized.
B.
While depressing the brake (with the engine off and the hood open) turn
the ignition key to the "RUN" (not "start") position.
C.
Put the car in gear from the "PARK" position.
D.
Put the car back in "PARK" and release the brake.
Note : Confirm initialization by turning the ON/OFF control switch "OFF" and
then "ON". The red LED on the AutoCommand
diately as the switch is flipped from the "OFF" to the "ON" position.
If the unit is not initialized then the dash lights will come on (the AutoCom-
mand
®
powers up the ignition wires) when the brake is depressed when the
hood is open when the control switch is on. REPEAT STEPS A THROUGH D.
See the purple colored Trouble Shooting Sheet if necessary.
13. Green Wire - Tach Input - Control Harness
®
The AutoCommand
has two ways of monitoring the car during the starting
process. Both ways will ensure a clean, accurate start. Read about both
methods before deciding which one to use. Normally you should try the "No
Tach
TM
" method first.
"No Tach
TM
" Starting
This starting method does not require the connection of the GREEN tach wire.
This method will start the car by reading the car's voltage before attempting to
start, and then looking for a voltage increase when the alternator kicks in.
This feature automatically takes into account voltage, temperature, and the
time since the vehicle was last run. The "No-Tach
factory and you can skip step 13A if you would like to use it. Note that if the
vehicle is hard to start, set option #3 (step 23) for "extended crank."
Tachometer sensing
If the vehicle is generally hard starting (requiring a cranking time of more than
1 second) you will get more accurate starting with the tachometer sensing
starting method. This method starts the car by reading the engine speed
(tach) information from a wire under the hood. If you choose tachometer
sensing, connect the GREEN (18 awg) wire to the car's tach wire under the
hood (normally the negative side of the coil or tach output of coil pack). After
you have connected the GREEN wire, you need to teach the AutoCommand
the vehicle's tach rate at idle. Proceed to step 13A.
Note : You must have already initialized the module from Step 12.
13A.
Tach Rate Learning
Note : Only use if the tachometer sensing method is chosen.
A.
Connect the GREEN wire to the car's tach wire under the hood.
B.
Turn the On/Off control switch to the "OFF" position. Wait 5 seconds for
the first set of LED flashes to stop.
C.
Push the White "option" button once and you will see the red LED flash.
Now push the middle button on the transmitter for a second until you see
the red LED flash again. You are now in TACH mode. (If the LED flashed
twice -- simply push the transmitter button again until you get only one
flash).
D.
Wait 5 seconds for the red LED to flash 3 times.
E.
Turn the On/Off control switch back to the "ON" position
F.
Start the car and let it get to a normal idle. Do not press on the gas
pedal.
G.
Push the red "code" button for a second.
H.
Watch the red LED. It will turn on (solidly) after 3 or 4 seconds, indicat-
ing that the idle rate has been learned.
I.
Watch the LED stay on steady as the vehicle is running and goes off as
you rev the rpms above twice the idle rate. The LED must go out when
you rev it above twice the idle rate to confirm correct tach learning.
J.
Turn the key to the "Lock/Off" position.
K.
Turn the On/Off control switch off and the LED will go out.
Note : Once these steps are complete – you cannot use the LED to confirm
tach again. You can however repeat the above steps to learn tach over again
at any time.
DesignTech disclaims any liability or responsibility arising out of any inaccuracies of this information or use of this information in installation or otherwise.
©1998 All Rights Reserved
DesignTech International, Inc.
®
Many of the optional steps require a relay to be hooked up. The most common
relay used for this type application is the Bosch type relay. Use the diagram
below for a typical hookup. If you have another relay then you need to know
that pins 85 and 86 in this diagram relate to the coils of the relay. Pin 30 is the
'common', and pin 87 is the 'normally open' contact. If your relay has a pin
87A in the middle it is the normally closed contact and is not used. (The dia-
gram below is typical for horn or trunk applications).
®
module will flash once imme-
14. Yellow Wire - Headlights/Parking Lights - Control
Harness
Connect the YELLOW wire which is optional, if your want to activate the low
beam headlights or parking lights. After the AutoCommand
car, the lights will remain on until the system shuts off after 10 minutes, or
when the brake pedal is pressed, or when the key is inserted into the ignition
and the car is put into gear. This is a relay +12V output. Connect the YEL-
LOW wire to the wire that powers the lights for this feature.
15. Blue - Horn / Siren - Control Harness
TM"
starting is preset at the
The BLUE wire which is optional, signals the horn to honk (or siren to chirp)
once each time the AutoCommand
locked or unlocked This is a 400 mA transistor ground output which MUST
drive a relay as in the left diagram above. (Included in Model 20028 only). If
you are using the relay and relay harness included with Model 20028, the
connections are as follows.
®
16. Brown Wire - Accessory Pulse - Control Harness
The BROWN wire which is optional, is the Accessory Pulse output which gives
out a transistor ground output just as the Accessory wire comes on. This is
important in unusual vehicles to control the defroster or to control the GM
R.A.P. system. Again, this is a 400 mA transistor ground output which
MUST drive a relay (not included).
17. Brown/White - Alarm Disable/Starter Kill - Control
Harness
The BROWN/WHITE wire which is optional is Alarm Disable, which will give
out a quick negative pulse just before starting the vehicle. This wire can be
used to turn off the factory alarm system in vehicles which have them. In most
vehicles this wire is located in the driver's kick panel. Using Option 19, you
can set this to Starter Kill which is active whenever the vehicle is running
under AutoCommand
to disable the starter wire of the vehicle. Have this wire go to one side of a
relay coil and tap into the Blue IGN1 wire and connect this to the other side of
the relay coil. Cut the starter wire of the vehicle in half and connect one side to
the common contact of the relay and the other and the other side to the nor-
mally closed contact of the relay.
3
Section 5 - Page 19
®
starts the car and each time the locks are
Harness Wire
Connection
Black
AutoCommand
®
Blue wire
White
+12V Constant
Blue
+12V Constant
Yellow
To Siren's Brown (or colored) wire [Connect the
Black wire from the Siren to Ground]
®
control or when the alarm is armed. This can be used
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www.designtech-intl.com
®
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