remote start, 2004 grand prix

Good evening, I just finished installing my remote start/alarm system in my 2004 grand prix. I used the bmw nitro 433 system with the 556U bypass module. EVERYTHING works fine except for remote starting the car. The alarm, door locks, trunk pop, etc all work accordingly. When I try to RS the car, I hear the bypass module clicking, nothing happens, and the whole system stops working. Then I have to unhook my neg batt cable n rehook it to get it workin again. I have the starter kill (n/c prewired relay) wired that 85 GWR, 86 ign12V, 30 starter side, 87a key side. Ive tested all of my wires, all carry the charge they're suppose to, to and from the system. Id really appreciate it if someone would help. I know the rs system isn't a usually used one such as viper, but that shouldn't b an issue. I can provide pics, etc to assist!!

Sorry but I know nothing about either the car or the R/S except that 85 on that relay should be GWA* not GWR, the GWR should go to the by-pass blue wire. *GWA = Ground whilst armed, GWR = Ground whilst running A.K.A. status output.

Your wiring on that external relay looks like Anti-Grind not Starter Kill. 

Being as you cut the Starter wire and inserted the relay, it now matters where you

connect the BMW 433 Violet Starter Output wire.  It should be either to Pin 87 oron the Pin 30 side of the cut starter wire.

      Grand Prix                                                                                                        BMX 433  Thick IGN wires

12volts          red (50A)  +        back of fuse box, passenger dashStarter           yellow  +             ignition harness                                               Purple  Ignition          pink  +                ignition harness                                                PinkAccessory     brown  +            ignition harness                                               Orange The BMW 433 Blue/White wire should go to the 556UW Blue (-) Status Input.  If youconnect the Blue/White wire to more than one place, diode isolate the connections.

Soldering is fun!

I switched the 30pin to the key side and 87a to starter side. connected the purple starter wire to the starter side 87a; 86 ign 12V, 85 GWA wire from r/s..these are all of my connections

BMW---->Car

purple wire----starter side pin 87aorange wire----brown acc wire ign switchred wire----WHITE/ black constant 12V ign switchpink wire----pink ign wire ign switchpink/white wire----pink ign wire BCMPURPLE / white wire----tach wire at PCM, confirmed tach readingBLACK/ white wire----park break switch wire BCMblue/white wire----blue wire 556U

GREEN/ black wire----purple fac disarm wire

GREEN / WHITE wire----lt green fac arm wirebrown wire----white brake wireyellow wire----(2nd)pink ign wire BCMgreen wire----diode isolated door trigger wires BCM

orange wire----87a starterkill/antigrind relay

blue wire----blue pssnger unlock wireBLACK/ white wire----tapped into green door trig wire on r/sWHITE/ black wire----relayed to trunk release wire

brown wire---red siren wire

white wire----parking lights wiredoor wires--driver door lock/unlock wiresall power wires were connected, all ground wires were properly grounded

BMW---->Car

purple wire----starter side pin 87aorange wire----brown acc wire ign switchred wire----WHITE/ black constant 12V ign switchpink wire----pink ign wire ign switchpink/white wire----pink ign wire BCM                          *******  Not Necessary

PURPLE / white wire----tach wire at PCM, confirmed tach readingBLACK/ white wire----park break switch wire BCMblue/white wire----blue wire 556U

GREEN/ black wire----purple fac disarm wire

GREEN / WHITE wire----lt green fac arm wirebrown wire----white brake wireyellow wire----(2nd)pink ign wire BCM                         ******  Not Necessarygreen wire----diode isolated door trigger wires BCM

orange wire----87a starterkill/antigrind relay                *****  Typo - Should be Pin 85 as noted above?

blue wire----blue pssnger unlock wireBLACK/ white wire----tapped into green door trig wire on r/sWHITE/ black wire----relayed to trunk release wire

brown wire---red siren wire

white wire----parking lights wire                            **** Selectable + / - output

door wires--driver door lock/unlock wires

Here is a note from DEI :

Keysense       lt. green (required)  (-)          ignition harness or BCM, conn. C1, pin 40 Bulldog, Omega and Audiovox don't say Keysense is required but if you are having issues,try connecting it to the Blue/White GWR wire also.  Use 1N400x diodes inline to isolate the twowires ( 556UW and Keysense ) bands toward the BMWX 433.

Soldering is fun!

yes that was a typo, its connected to 85. So let me get this straight; I should solder the green keysense wire from the 556u to the lt green keysense wire at the ign switch? which do i run a diode off towards the blue/white bypass output wire, both?

A diagram is worth a thousand words  :

Soldering is fun!

Being that my car has a negative keysense, shouldnt the diode coming from the ignition switch be the other way around? And thanks a lot man for helping me out. I'm going to dig back into it tomorrow to see if this fixes the problem.

The purpose of the diode is to prevent the (-) Keysense signal generated from inserting a key into the ignition cylinder from feeding back to the 556UW bypass module and turning it on during a normal key start-up.  The diode blocks this signal.  You only want the BMWX 433 GWR output to signal the 556UX and fool the vehicle into thinking a key is inserted during an actual remote start.Soldering is fun!

oh okay. well isnt that just like wiring the keysense wire of the 556u to the car keysense wire? the 556u manual says doing this will achieve the same goal, canceling out the 556u when a key is inserted in the ign switch.