DesignTech AutoCommand 20022 Installation Manual page 9

16. Brown Wire Acc. Pulse
The optional BROWN wire is the Accessory Pulse output which gives out a 1 second
transistor ground output just as the Accessory wire comes on. This is important in
some 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
The optional BROWN/WHITE wire will put out a 1 second negative pulse just
before starting the vehicle. This wire can be used to turn off the factory alarm
system in vehicles that have them.
Note: On most vehicles, this wire can be connected directly to the
factory alarm/disarm wire which is usually located in the driver's
kick panel.
18. Red/Black Diesel Input
The optional RED/BLACK wire will sense the turning on and off of the Diesel
Glow-Plug light to determine when to crank the vehicle. Hook this wire to the
switched wire of the diesel glow-plug light or to the glow-plug wire itself.
Required Final Steps
19. Trying the Unit Out
WARNING: Be prepared to apply the brake during this testing. Close the
hood, fully apply the emergency brake, and place the vehicle in Park.
A. Once all the wiring is checked and is correct, put the car in
park, then press the button on the transmitter of the host alarm
or keyless entry system which controls the AutoCommand.
B. The car should start and continue to run for ten minutes.
Please make sure that the engine shuts down if the car is taken
out of park, the hood is opened or the brake is pressed.
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Control Harness
Control Harness
Control Harness
20022
11. Initializing the AutoCommand®
B
EFORE THE CAR WILL START FOR THE FIRST TIME
A C
UTO OMMAND
A. The AutoCommand® requires the installer to press and hold the
brake pedal and open Hood.
B. While depressing the brake (with the engine off) turn the igni-
tion 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.
Confirm initialization by turning the ON/OFF control switch "OFF" and then
"ON". The red LED on the AutoCommand® module will flash once immedi-
ately as the switch is flipped from the "OFF" to the "ON" position.
IF THE UNIT DOES NOT INITIALIZE AT THIS TIME, REPEAT STEPS
A THROUGH D ABOVE.
12. Green Wire Tach Input
The AutoCommand® has two ways of monitoring the car during the starting
process. Both ways will ensure a clean, accurate start. Read about both meth-
ods before deciding which one to use. Normally you should try the "No Tach
method first.
TM
"No Tach " 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 at-
tempting 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
preset at the factory and you can skip step 12A if you would like to use it.
Note that if the vehicle is hard to start, set option #3 (page 14) 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 sens-
ing starting method. This method starts the car by reading the engine speed
(tach) information from a wire under the hood. If you choose tachometer sens-
ing, connect the GREEN (18 awg) wire to the car's tach wire under the hood.
After you have connected the GREEN wire, you need to teach the AutoCom-
mand® the vehicle's tach rate. Proceed to step 12A.
Note: You must have already initialized the vehicle.
20022
,
YOU MUST INITIALIZE THE
Control Harness
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"
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starting is
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