IM_FULL_50SL_REV-A
18
PARK/NEUTRAL ECM INPUT
The Park/Neutral ECM input is the preferred method of installation. This not only maintains the integrity of the factory
circuit, it is also the easiest to install, provided the vehicle you are working on has this ECM input.
The installation required for this application (shown below), indicates a slight reconfiguration of the control switch wiring.
Shown is a typical GM Park/Neutral ECM input circuit.
To connect the Remote Start unit to the GM Park/Neutral ECM input:
Locate the Orange/Black reference wire in the “C2” connector found at the ECM in GM B Body vehicles or, locate the
equivalent reference wire in the vehicle you are installing the Remote Start Unit in.
1. Connect the BLACK/WHITE Neutral Safety Switch wire to this reference wire.
2. NOTE:
If the optional remote starts enable toggle switch is installed, connect the one side the enable switch to this
reference wire and connect the other side of the enable switch to the BLACK/WHITE Neutral Safety Switch wire (H2/8)
of the Remote Start unit. The reference diagram on the next page shows a typical GM B Body ECM reference wire and
how it is to be connected to the Remote Start Unit.
Ignition
P
1
P
2
P
D
P
N
P
R
P
Electronic Control Module (ECM)
Solid State, Do Not Measure
Resistance
To Neutral Safety
Switch Input wire
Black/White
(
H6/8
)
Optional Enable Switch
KEY IN SENSOR CIRCUITS
If the vehicle you are working on does not have or you cannot locate the ECM reference wire, there are two alternatives
available. Although not preferred, the vehicle Key In Sensor may be reconfigured to allow a margin of safety and will
prevent the vehicle with a Mechanical Neutral Start Switch from starting in gear.
WE ADVISE THAT YOU MAINTAIN THE FACTORY CIRCUIT WHENEVER POSSIBLE.
The following two circuits may be used only if the above circuit is not available.
NOTE:
When completing an installation using either of the following key in sensor circuits, if the operator inserts the
ignition key while the vehicle is running under the control of the Remote Start, the vehicle will shut down. This must be
explained to the operator as it is in contrast to the normal operation of a vehicle utilizing an electrical neutral start switch
and is inconsistent with the operation manual.
Additional information concerning Key in Sensor methods 1 & 2 are listed below and should be reviewed before
considering either alternative.
METHOD 1
will allow the safety required for the remote start unit and prevent the vehicle from starting while in any gear
other than Park or Neutral while the key is in the ignition cylinder. However, if the key is left in the ignition switch and the
door is left opened, the added relay will be energized causing a 150mA drain on the battery.
METHOD 2
will allow the safety required for the remote start unit and prevent the vehicle from starting while in any gear
other than Park or Neutral while the key is in the ignition cylinder. However, the original factory key in chime module will
not alert the owner that the key has been left in the ignition switch. In addition, this may also affect other warning tones
such as the light on reminder.
These situations should be carefully considered before altering the vehicle’s wiring and must be fully explained to
the consumer.
See next page for METHOD 1 and METHOD 2 procedures.
