Directed Electronics 556U - User Manual

11
© 2004 Directed Electronics, Inc. N556U 09/04
The 556U immobilizer interface module is used when installing remote start products in vehicles equipped with
an RF (Radio Frequency) based immobilizer system. This type of system uses a small chip imbedded in the igni-
tion key, called a transponder, to transmit a very low powered RF signal. This signal is picked up through an
antenna (or coil) around the ignition switch which is then sent to the immobilizer’s transceiver. Once the correct
signal is received, the immobilizer will enable the ignition and/or fuel systems. If an attempt is made to start
the vehicle and the transceiver does not receive a valid code, the ignition and sometimes the fuel systems are
disabled. The immobilizer system will then render the remote start useless. The 556U bypasses the immobilizer
system only while the remote start is in use, maintaining the factory system’s integrity. When the remote start
system is not in use the factory immobilizer remains fully functional.
RREEDD ((++)) 1122 VVoolltt IInnppuutt::
Connect this wire to a fused source of constant 12V.
BBLLUUEE ((--)) SSttaattuuss IInnppuutt::
Connect this wire to the remote start negative (-) status output.
PPIINNKK ((++)) IIggnniittiioonn IInnppuutt::
Connect this wire to the vehicle’s true ignition output. (Refer to
Latching Input , page 7.)
BBLLAACCKK ((--)) CChhaassssiiss GGrroouunndd IInnppuutt::
Connect this wire to the vehicle’s chassis ground.
VVIIOOLLEETT ((++)) KKeeyysseennssee IInnppuutt::
Connect this wire to the vehicle’s positive keysense output wire. (Refer to
Key Sense
Inputs
, page 7.)
GGRREEEENN ((--)) KKeeyysseennssee IInnppuutt::
Connect this wire to the vehicle’s negative keysense output wire. (Refer to
Key Sense
Inputs
, page 7.)
BBLLAACCKK aanndd BBLLAACCKK//RREEDD WWiirreess::
Both of these are antenna ring wires.
BBLLAACCKK//WWHHIITTEE::
Refer to alternate wiring diagram.
33--PPiinn HHaarrnneessss
66--PPiinn HHaarrnneessss
PPrroodduucctt DDeessccrriippttiioonn
556U Immobilizer Interface

Summary

Product Description

6-Pin Harness Wiring

Details wiring for the 6-pin connector, covering power, status, ignition, ground, and keysense inputs.

3-Pin Harness Wiring

Details wiring for the 3-pin connector, focusing on antenna wires and alternate wiring.

Immobilizer Interface Instructions

Coded Key Requirement

Installer must inform customer that a coded key must be used and permanently installed.

Future Key Programming Notification

Installer must notify customers about potential reprogramming needs for additional keys.

Standard Immobilizer Interface

Alternate Immobilizer Interface No. 1

Alternate Immobilizer Interface No. 2

Jumper Settings

Key Sense Inputs

Latching Input

Directed Electronics 556U Specifications

General

Type	Car Alarm
Compatibility	Universal
Remote Start	Yes
Shock Sensor	Yes
Keyless Entry	Yes
Panic Mode	Yes
LED Status Indicator	Yes
Voltage	12V DC
Function	Security System
Current Draw	20mA
Operating Temperature	-40°C to 85°C
RF Frequency	433 MHz