6/18/2007
RS-602 REV A.
15
from the remote start device to the vehicle PARK/NEUTRAL ECM input or the vehicle key in sensor. This connection will
prevent remote start operation if the key is left in the ignition switch regardless of the gear selector position.
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, providing the vehicle you are working on has this ECM input.
The installation required for this application (shown below), indicates in the 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:
1. 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.
2. Connect the BLACK/WHITE Neutral Safety Switch wire (H3/4) to this reference wire.
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 (H3/2) of the Remote
Start unit.
The reference diagram below shows a typical GM B Body ECM reference wire and how it is to be connected to the Remote
Start Unit.
Ignition
P
1
2
D
N
R
Electronic Control Module (ECM)
Solid State, Do Not Measure
Resistance
To Neutral Safety
Switch Input wire
Black/White
(
H3/4
)
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 operators’ 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.
METHOD 1
+ 12 V
Ignition Key In Sensor
Switch Closes with Key In
Ignition Cylinder
Switch
Drivers Door Pin Switch
87a
86
30
87
85
Key In
Chime Module
Connected to (-) Negative
Safety Input Wire
White/ Black
(
H3/3
)
To Hood Pin Switch Safety
Shut Down (
H3/3
)
1N4003
+ 12V
To connect to the key in sensor as shown in method 1:
A. Locate the control wire that connects the driver’s door pin switch to the key in sensor switch.
B. Cut this wire and connect the ignition cylinder side to chassis ground.
