will 555x work on lexus 2000 ls400?

Googling around I see 556u is the recommended immobilizer. I bought a 555x on eBay and they seller listed the 555x as being compatible, but I am not seeing and wires listed in the forum's wiring diagram https://www.the12volt.com/installbay/alarmdetail/1287.html. Seller suggests these wires: Color :RED / white (data), RED / black (clock), red (synchro) Polarity: data The immobilizer ignition wire is white and the ground reference wire is WHITE/ black. Any suggestions? Thnks in advance.

Do yourself a favor and use an ADS TBSL TI from idatalink. They are much more reliable and won't require a key in the box like the 556u. The TBSL-TI comes pre-flashed with the correct firmware (TB-TL).Kenny

Owner / Technician

KKD Garage LLC

Albany, NY 12205

If this is for a DEI 555X, not a 556UW, here is the info you seek.

Here is a link to the 555XW info from Xpresskit.  It does list the 2000 Lexus LS400 :

http://www.xpresskit.com/product.aspx?productid=39

Below is a wire color list from iDatalink for their bypass module.  Unfortunately they use different names for the wires.

LS 400 98-00         555X name

AMP      pin 1   White (DATA)   Ignition switch Code    pin 2   RED / White (DATA)       Ignition switch       =  DataRXCK   pin 3   RED / Black (DATA)       Ignition switch       =  ClockTXCT    pin 4   Red (DATA)                  Ignition switch       =  SynchGround   pin 5   WHITE/ Black (-) Ignition switch       =  GroundKey Sense      pin ~   Yellow (-)          Ignition switch       =  Keysense

Ignition (+)    White    @ Ignition harness

Think that should be enough info to get it working.

Here it is laid out like the 555X chart on page 2 of the guide :

Vehicle     SYNCH          CLOCK          DATA   IGNITION        GROUND   KEY SENSE

00 LS400            Red  RED / Black     RED / White     White             WHITE/ Black         Yellow

Soldering is fun!