User Guide

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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 of content (9 pages)

PAGE 1
556U Immobilizer Interface Product Description 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 ignition 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.
PAGE 2
Immobilizer Interface Instructions Please note that the instructions outlined in the Standard Immobilizer Interface section describe an immobilizer interface that will work with the majority of vehicles; however, some vehicle immobilizer systems may require an alternate interface due to mounting issues, cosmetic differences, or RF loss when coupling the factory key RF with the 556U to the factory transponder ring. (See Alternate Immobilizer Interface.
PAGE 3
Standard Immobilizer Interface 1. Open the control module and place the vehicle’s coded key through the center of the black receiver ring as shown. 2. Reassemble the control module. This will secure the key inside. IMPORTANT! When using the ring method of installing the 556U, the ring from the 556U MUST be in front of the factory receiver ring. It CAN NOT be on top of, or behind the factory receiver ring. See illustration below. 3.
PAGE 5
Alternate Immobilizer Interface No. 1 This type of interface will only work with immobilizer systems that have a two-wire factory antenna harness. This alternate interface method is not guaranteed to work with all immobilizer systems, due to differences in transponder systems. It is meant to provide the installer with an alternative interface method for most two-wire transponder ring systems. This method will not work on European vehicles. 1.
PAGE 6
4. Plug the three-pin connector into the 556U module and cut the 556U’s antenna wire off. Discard the antenna ring. 5. Split open the factory transponder ring tube and cut one of the two wires in half. 6. Connect the factory transponder ring side of the cut wire to the BLACK/WHITE normally closed input wire of the 556U. 7. Connect the factory transceiver module side of the cut wire to the 556U’s BLACK wire. 8. Connect the BLACK/RED wire to the uncut factory transponder ring antenna wire. 9.
PAGE 7
Alternate Immobilizer Interface No. 2 This type of interface will only work with immobilizer systems that have a two-wire factory antenna harness. This alternate interface method is not guaranteed to work with all immobilizer systems, due to differences in transponder systems. It is meant to provide the installer with an alternative interface method for most two-wire transponder ring systems. This method will work on European vehicles. 1.
PAGE 8
4. Plug the three-pin connector into the 556U module and cut the 556U’s antenna wire off. Discard the antenna ring. 5. Split open the factory transponder ring tube and cut one of the two wires in half. 6. Connect the factory transponder ring side of the cut wire to the BLACK/WHITE normally closed input wire of the 556U. 7. Connect the factory transceiver module side of the cut wire to the 556U’s BLACK wire. 8. Connect the BLACK/RED and BLACK/WHITE wires to the factory transponder ring side of the cut wire.