Does a later ECM automatically provide OBDII support?

[75Connie]

I hope I'm not breaching state secrets here...

But, just wondering if I was to replace my pre- 2003 ECM on my CDT with a post- 2003 one, would that make my car OBDII compliant (obviously assuming additional necessary sensors were added)?

[whitevanman]

I hope I'm not breaching state secrets here...

But, just wondering if I was to replace my pre- 2003 ECM on my CDT with a post- 2003 one, would that make my car OBDII compliant (obviously assuming additional necessary sensors were added)?

I'm confused, my 99 dealer launch gave me codes on my scanner, That's how I knew to change 2 coil packs..:shrug: or was it not full OBDII, Also my 2001 CDT seems to give codes just fine, not that i've seen many to be truthful.

[chrissyboy]

2001 petrol and 2004 diesels ,white van man you may have a replacement ecm in your car

[marinabrian]

Any NNN100692 or NNN100720 can be replaced with NNN500340 ECM, provided the late ECM is a virgin unit and then the cars thirteenth digit SA string of ZCS coding altered to include EOBD.

The ECM can then be coded to the car using T4, and will be EOBD compliant.

The car will report a permanent error of "T21 boost temperature sensor" due to this sensor not being present.

I often alter this part of the ZCS coding in my own test mule, when testing different variants of DDE4.


Brian :D