Autostart as2520 Installation Manual page 8

(+) Glow-Plug
12 YELLOW
input
P. 8
In diesel mode, this positive input will monitor the glow plug
light: it will wait for up to 30 seconds until the glow-plug light
goes out before allowing the module to proceed to cranking the
engine. Connect to the side of the glow-plug light which is
positive when the light is on.
Note: the module will nevertheless proceed to cranking the
engine if the glow-plug light is still on after the 30-sec. delay
(25 sec. when the run time is set to 30 min.).
A Note on the Diesel Glow-plug Indicator Light:
(Also known as the "wait-to-start light".) The purpose of the
glow-plug circuit on diesel vehicles is to pre-heat the
combustion chamber before the vehicle is started.
When a remote starter is installed on a diesel vehicle, the
glow-plug section of the ignition circuit must be activated and
allowed to operate before the vehicle is remote-started. For
that purpose, the glow-plug input wire of the module must be
connected to the glow-plug indicator light of the vehicle.
Caution! The module will only accept positive glow-plug input
signals, therefore negative glow plugs should only be
connected using relays to invert the polarity.
A diode must be added between the negative glow-plug trigger
on the relay and the negative glow-plug wire of the car. This is
to prevent feedback effects on the glow-plug indicator light on
the instrument cluster: the light on the dash would come on
because of the feedback, even though the circuit is off.
When the user remote-starts the vehicle:
The module will power up the Ignition circuit and wait to
engage the starter motor while the glow-plug indicator light
is still on.
The module will engage the starter motor as soon as the
glow-plug light (+) goes out.
Minimum waiting time is 5 seconds.
Maximum waiting time is 30 seconds.
If no glow-plug wire is found on the vehicle, the glow-plug input
on the module may be "timed out". The module will power up
the ignition and glow-plug circuits and simply wait for the time-
out before starting:
Connecting the glow-plug input wire of the module to
ignition will hold the ignition ON for the maximum waiting
time (15 sec., recommended).
Keeping the glow-plug input wire of the module
unconnected will hold the ignition ON for the minimum
waiting time (5 sec., not recommended in very cold
environments).
Connect the glow-plug wire to the ignition wire only after the
tach programming has been completed: connecting the glow-
plug wire is one of the very last steps in the installation
process.
Installation Guide