Directed Electronics 556U Manuel utilisateur

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((++))1122VVoollttIInnppuutt::Connect this wire to a fused source of constant 12V.

BBLLUUEE((--))SSttaattuussIInnppuutt::Connect this wire to the remote start negative (-) status output.

PPIINNKK((++))IIggnniittiioonnIInnppuutt::Connect this wire to the vehicle’s true ignition output. (Refer to

Latching Input

, page 7.)

BBLLAACCKK((--))CChhaassssiissGGrroouunnddIInnppuutt::Connect this wire to the vehicle’s chassis ground.

VVIIOOLLEETT((++))KKeeyysseennsseeIInnppuutt::Connect this wire to the vehicle’s positive keysense output wire. (Refer to

Key Sense

Inputs

, page 7.)

GGRREEEENN((--))KKeeyysseennsseeIInnppuutt::Connect this wire to the vehicle’s negative keysense output wire. (Refer to

Key Sense

Inputs

, page 7.)

BBLLAACCKKaannddBBLLAACCKK//RREEDDWWiirreess::Both of these are antenna ring wires.

BBLLAACCKK//WWHHIITTEE::Refer to alternate wiring diagram.

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556U Immobilizer Interface

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

IIMMPPOORRTTAANNTT!!Before beginning the installation inform the customer that one of the vehicle’s

coded keys must be used in the installation and installed permanently in the unit. If a new key

is being purchased through the dealer, make sure to code the new key to the factory immobi-

lizer or have the dealer do this. In many vehicles, the new key must be coded at the dealer.

IIMMPPOORRTTAANNTT!!It is also the installer's responsibility to notify customers of the following: If they

wish to have additional keys programmed to the vehicle's immobilizer system in the future,

certain vehicle manufacturers require that all programmed keys be reprogrammed at the time

that the keys being added to the system are programmed. In this case, it would be necessary to

remove the already programmed key from the 556U module to reprogram it. (If the customer

plans on having additional keys programmed to the vehicle in the future, the shaft of the key

should not be altered.)

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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.

IIMMPPOORRTTAANNTT!!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. Disassemble the steering column shroud and place the antenna ring around the vehicle’s ignition switch as

shown, and plug into the control module.

4. Plug the 6-pin power plug into the control module.

5. Connect the BLACK wire to chassis (ground).

6. Connect the red wire to a fused source of constant 12V.

7. Connect the blue wire to the status output (blue wire) of the remote start system that provides a latched

negative (-) ground while the remote start is active.

8. Test unit before reassembling the steering column.

9. Reassemble the steering column shroud.

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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. TThhiissmmeetthhooddwwiillllnnoottwwoorrkkoonnEEuurrooppeeaannvveehhiicclleess..

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 to secure the key inside.

3. Disassemble the steering column shroud and locate the factory transponder ring’s antenna wires. The two

wires are usually located in a tube routing from the transponder ring to the factory transceiver module.

NNOOTTEE::Some vehicles may require other methods to access the factory transponder ring antenna

wires.

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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. Plug the 6-pin power plug into the control module.

10 Connect the BLACK wire to chassis ground.

11. Connect the RED wire to a fused source of constant 12V.

12. Connect the BLUE wire to the status output (blue wire) of the remote start system that provides a latched

negative (-) ground while the remote start is active.

13. Test unit before reassembling the steering column.

14. Reassemble the steering column shroud.

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. TThhiissmmeetthhooddwwiillllwwoorrkkoonnEEuurrooppeeaannvveehhiicclleess..

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 to secure the key inside.

3. Disassemble the steering column shroud and locate the factory transponder ring’s antenna wires. The two

wires are usually located in a tube routing from the transponder ring to the factory transceiver module.

NNOOTTEE::Some vehicles may require other methods to access the factory transponder ring antenna

wires.

AAlltteerrnnaatteeIImmmmoobbiilliizzeerrIInntteerrffaacceeNNoo..22

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.

9. Plug the 6-pin power plug into the control module.

10 Connect the BLACK wire to chassis ground.

11. Connect the RED wire to a fused source of constant 12V.

12. Connect the BLUE wire to the status output (blue wire) of the remote start system that provides a latched

negative (-) ground while the remote start is active.

13. Test unit before reassembling the steering column.

14. Reassemble the steering column shroud.

The 556U works with most RF based immobilizer systems. Refer to DirectWire for specific applications.

The 556U is shipped with the jumper set in a 60 winding position (mode 2). For most applications this should

be the optimal setting. Moving the jumper will set the 556U to work off of a 18 winding position (mode 1). You

may use the 18 winding for American and Asian vehicles, but for European vehicles the 60 winding setting is

required. Mode 2 jumper position will be more sensitive to picking up the key vice mode 1 jumper position.

Some vehicles require the vehicle never “read” two keys at the same time (Ford Escape, Mazda Tribute). These

vehicles require the key sense wire to be located in the vehicle. This wire will show either ground (-) or positive

(+) voltage when the key is slid in the ignition and the key chime sounds. Depending on the polarity of the

vehicle attach either the GREEN (-) or the VIOLET (+) wire from the 556U to the key sense wire in the vehicle.

When the 556U senses an input on these wires it will drop out immediately allowing the vehicle to only see the

key that was just placed in the ignition cylinder.

Some vehicles require that the key code does not change during a run cycle (Mercedes ML series). By attaching

the PINK wire from the 556U to the ignition wire in the vehicle, the 556U will stay engaged the entire time the

vehicle is running. This includes after the take-over with the key. With the PINK wire of the 556U attached to

the ignition in the vehicle, the 556U will stay engaged until the vehicle is shut off.

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