I read this can happen when reprogramming but how can you tell ? Any you guys had this happen be interesting hear . I have two I have tried too program with no luck and they are same part number

 

I can’t really help you but, I know others will want to know what year your XJR is. Update your signature so there’s no guessing.

 

Hi yes bit more info my car is a xkr 4.0 1999 long ongoing story with this car stearing went heavy two years ago at first it's work for short time but now always in stiff mode the survotronic is not getting a speed input running out what try next I have two engine ECUs from cars I scraped but can not get them too work also the suspension is very stiff

 

EVERY TIME an ECM is swapped to the X308 sedan, an ENGINE IMMOBILIZATION setup is required!!!!!!!!!!

There can ONLY be one ECM configured/programmed to the car at any given time.
You CANNOT simply 'plug' an ECM into the network without introducing it to the CAN bus and other networks.

Once that ECM is set to THAT car, you CANNOT move it back to another car without performing ENGINE IMMOBILIZATION setup on the original.

To quote the movie HIGHLANDER, "There can be only one"

 

It's strange I did get one others too program but would not start as you know when can bus is down there is blips X2 when ign turned on I got it with no warning on dash etc but no start went back too other ecu still no start till discounted isd and just gave it one more try and it started head well done in ha ha

 

ADCM and PAS module gets its speed signal from the instrument pack, make sure the two input wires can carry current. speed signal originiates in the ABS module goes over CAN and makes its way to the pack.

if your car has good drivability and speed readout you probably don’t have an ecm issue. anyways used modules are impossible to brick just run immo

 

Thankyou that is good info . The abs was working ok with no fault codes but still had the stiff suspension and stearing . Last week it failed Just had pump rebuilt . My next move is put air bag back on and get air con charged as ids will not read it I found before giving it a run then can read read air con again maybe it needs speed input too came alive ?

 

ccm can be read with ignition on no matter what. can you pull codes out of the ADCM?

please restate the symptoms of your problem

 

Help changed air con ecu can now read fault code but car will not start and windows stopped working any ideas before set fire too it got code p1260

 

p1260 = car immobilized

make sure your serial network has continuity

 

Agree that what code means . just don't understand why it was ok before change air con ecu it does turn over and fuel pump working and no warning on dash see scp even goes too windows looks like will be spending Sunday checking wiring what fun ha ha

 

Try another KEY. (please say you have more than ONE)

 

Yes 3 keys all turn engine and did reprogram them . Thinking maybe the code was in air con ecu may try putting old one back on bit pain as have remove stearing Collin again

 

The P1260 code can be set if the Passive Anti-Theft System (PATS) has determined a theft condition existed and the engine
is disabled or an engine start was attempted using a non-PATS key. This Diagnostic Trouble Code (DTC) is a good indicator
to check the PATS. This DTC can also be set when a new Instrument Cluster (IC), Instrument Panel Cluster (IPC) or Powertrain
Control Module (PCM) is installed without correctly programming either module even if the vehicle is not equipped with PATS.

 

Interesting looks like that's what's happened tried reprogramming clearly not doing it right must be a way using ids ?

 

Are you using IDS to perform an immobilization setup. (car with the wrench-setup and configuration?)

 

Yes did that went through the process ok . When I fitted the reconditioned abs pump same thing happen did all programming but no start discounted the ids and gave it one more go and car started . Thinking all good I changed the air con ecu and put car all back together just for it too go back too not starting .

 

x308 doesn’t have PATS.

it’s paired from KTM to ECM

 

I changed the ktm thinking it may had something too do with stiff suspension also too give me 3 keys program it too engine ecu and worked. I take it if the key not programmed the engine does not turn over . Mine does so looks like the ECM not getting it's start signal from ktm . I do have another spare ktm will see can program that too the keys and ECM worth a try ?

 

Ok I found can not program keys too another ktm only same ones .so would I need unlock the golden key in ids ? Maybe that's how dealers can do it ?