Ok, need help again..

[mrpackrat]

I am working on an 02 S4. It was crashed and destroyed the gauges. Another set of gauges was bought(used ), and of course it did not match up due to them being married or paired to another bike. I sent the ecu off to silverback to have the immobilizer disabled, was informed by them that they cannot do the ecu from the S4. So I bought a brand new ecu-ducati performance, and did not use the red key at first, and with the gauges plugged in it will not crank through the start button, but with the gauges disconnected it will crank and start and rev up and all. Then I tried using the red key, and same deal exactly..Any ideas? Don't want to disconnect the instrument cluster when ever the bike needs to be started-what a pain in the ass. The cluster works like normal after connecting once the engine is running. But turn it off  with the cluster connected and it goes right back to the won't crank and the immobilizer light just glows steady after the gauges sweep and all.. Any ideas of what can be done? Can the immobilizer in the cluster be cut out or disabled somehow? Thanks Bob

[Raux]

I am working on an 02 S4. It was crashed and destroyed the gauges. Another set of gauges was bought(used ), and of course it did not match up due to them being married or paired to another bike. I sent the ecu off to silverback to have the immobilizer disabled, was informed by them that they cannot do the ecu from the S4. So I bought a brand new ecu-ducati performance, and did not use the red key at first, and with the gauges plugged in it will not crank through the start button, but with the gauges disconnected it will crank and start and rev up and all. Then I tried using the red key, and same deal exactly..Any ideas? Don't want to disconnect the instrument cluster when ever the bike needs to be started-what a pain in the ass. The cluster works like normal after connecting once the engine is running. But turn it off  with the cluster connected and it goes right back to the won't crank and the immobilizer light just glows steady after the gauges sweep and all.. Any ideas of what can be done? Can the immobilizer in the cluster be cut out or disabled somehow? Thanks Bob

i would imagine one wire belongs to the immobilizer. get a wiring diagram and see if disconnecting that one wire from the gauge clip will help. i wouldn't cut it, just see if you can back it out of the clip (although not sure you can do that)...

[mrpackrat]

Sounds logical, anybody have a wiring diagram or know which wire to disconnect?? Thansk

[mrpackrat]

bump,,,,,

[Raux]

sorry. you should have the wiring diagram in your owners manual.
but you also can get a small one with the parts manual download from ducati.

[He Man]

edit: I doubt what i said will work since the immobilzer is a function of the gauges... go to the FAQ and see if you can find a tech manual that uses guages similar to yours. open it up and perhaps you can disable it by desoldering it or something.

good luck. If i were you, id just buy aftermarket guages.

[Raux]

OH so the immobilizer is in the guage set not the ECU... crap that makes sense now.

[He Man]

now you got me all confused raux. People get the immbolizer disabled on the ECU to use other guages... i thought the ECU just syncs itself to the gauges... disabling the immbolizer = unsyncing the ECU.

If a brand new ECU was purchased by the OP, you should be able to just plug in the new ECU and go with the program since it is unsynced.

Obviously it is unsynced though because the bike is starting up without the guages...

What year are your guages? Maybe they changed it and something in the gauge prevents it form starting? I know Someone here had a DP Hyper ECU in an S2R1000, there was a big enough difference that the guages had to be reset every so often. so he just built a switch next to it to serve as a reset button.

[Raux]

no wait. i'm confused.

his bike starts with the guages unplugged but not when they are?

ok then the immobilizer is in the guages. BUT the ecu reads whether it is disengaged.

hence the reason you can switch to the DP ECU with no recoding?

that make sense?

[mrpackrat]

Yeah has me stumped, I cannot find anything in the FAQ's or in any tech postings...Nor a wiring diagram on this site. The gauges are from a 02 s4. the guy I got them from bought them new, and used them for 1200 miles. He fixed his original gauges put them back on and sold me these gauges.. I am going to look for the post from the guy with the bike you said that he put a switch by the gauges to reset on occasion..

[He Man]

you can download a similar workshop manual and look at the wiring diagram for the guages...

as for the post, good luck finding it, its buried deep on this forum. theres only 2-3 post about it and its in a thread about dyno charts.

[Speeddog]

IIRC, the S4 wiring diagram doesn't have any significant info on the wires going to the ECU and gauges.
Certainly not something as obvious as 'immobilizer'.

Perhaps the antenna, located inside the black plastic 'shell' on the ignition switch, isn't plugged in, or isn't working?

[mrpackrat]

Yeah I really could not find the post about the switch on one wire to the gauges-or anything remotely similar. The antenna does not have anything to do with it. the bike will start with the gauges disconnected-if it did not recognize the key it would not start at all would it? It is just that the gauges do not match the key antenna, and ecu. I believe right now the ecu will be willing to work with anything virgin and not even need a chipped key, but I could be wrong.