Search found 13 matches

by bretman
Wed Oct 11, 2017 9:30 am
Forum: General and Support forum
Topic: FORScan PCM reprogramming (as-built) RX-8 (+other Mazdas...)
Replies: 100
Views: 128147

Re: FORScan PCM reprogramming (as-built) RX-8 (+other Mazdas

One last couple of bits of info: We found that the second brake switch sensor (BPA PID) originates from the Instrument Cluster. The JDM cluster does not have a cruise light and also does not pass on the BPA signal, even if you have the right brake switch. If this is not present, it behaves in the sa...
by bretman
Wed Oct 11, 2017 9:27 am
Forum: General and Support forum
Topic: FORScan PCM reprogramming (as-built) RX-8 (+other Mazdas...)
Replies: 100
Views: 128147

Re: FORScan PCM reprogramming (as-built) RX-8 (+other Mazdas

Interesting... I do know that the JDM domestic vehicles are usually mapped for 100 RON fuel, whereas the NZ domestic market ones are mapped for 95 RON. As I understand it the 100 RON mapping may be more aggressive, but the timing gets pulled back based on the knock sensor limits, so whether it would...
by bretman
Tue Oct 10, 2017 12:41 am
Forum: General and Support forum
Topic: FORScan PCM reprogramming (as-built) RX-8 (+other Mazdas...)
Replies: 100
Views: 128147

Re: FORScan PCM reprogramming (as-built) RX-8 (+other Mazdas

OK, success! We managed to force a flash update of the PCM via the M-MDS. Essentially changed my Axela JDM PCM into a domestic market NZ MPS one. Cruise all working, and no ill effects to the vehicle, so it looks like the cruise option was actually disabled in the PCM firmware. The good news is that...
by bretman
Mon Oct 09, 2017 8:18 am
Forum: General and Support forum
Topic: FORScan PCM reprogramming (as-built) RX-8 (+other Mazdas...)
Replies: 100
Views: 128147

Re: FORScan PCM reprogramming (as-built) RX-8 (+other Mazdas

So, just to share findings in case it is of use for others: I'm now pretty confident that the PCM change required to activate cruise on a BL Mazdaspeed 3/Axela 3 is PCM3 as set out above. This is the change that the dealer software makes when the "speed options->cruise control" option is enabled. Tu...
by bretman
Fri Oct 06, 2017 10:16 pm
Forum: General and Support forum
Topic: FORScan PCM reprogramming (as-built) RX-8 (+other Mazdas...)
Replies: 100
Views: 128147

Re: FORScan PCM reprogramming (as-built) RX-8 (+other Mazdas

... and with the replacement cluster, the BPA PID is now working.

We're close, I can feel it.
by bretman
Fri Oct 06, 2017 3:36 am
Forum: General and Support forum
Topic: FORScan PCM reprogramming (as-built) RX-8 (+other Mazdas...)
Replies: 100
Views: 128147

Re: FORScan PCM reprogramming (as-built) RX-8 (+other Mazdas

So, headway at last... After putting a serial sniffer behind Forscan, I managed to get enough information on the protocol commands to be able to work out how to display the PCM data from a terminal onto the ELM327. Although 21 00 didn't work, I managed to get the VIN data block back using 22 DE 00 (...
by bretman
Sun Oct 01, 2017 7:28 am
Forum: General and Support forum
Topic: FORScan PCM reprogramming (as-built) RX-8 (+other Mazdas...)
Replies: 100
Views: 128147

Re: FORScan PCM reprogramming (as-built) RX-8 (+other Mazdas

Been doing lots of reading of the protocol specs and so on. What I’m getting is an error setting the diagnostic mode: 1085 -> returns 7F1012 -> Error 12 - sub function not supported 1003 -> does work -> returns 50 03 00 32 01 F4 When I then send: 2100 -> returns 7F 21 11 -> Error 11 - Service not su...
by bretman
Fri Sep 29, 2017 5:36 pm
Forum: General and Support forum
Topic: FORScan PCM reprogramming (as-built) RX-8 (+other Mazdas...)
Replies: 100
Views: 128147

Re: FORScan PCM reprogramming (as-built) RX-8 (+other Mazdas

Thanks for the info. I will have a read. Yes, I am getting the 7F error as the response so that may well explain it. The PCM data itself is very similar to the rx-8 - it just looks like a few extra setting bytes have pushed the cruise bit into line 3. I’ll have a go at scripting the commands to at l...
by bretman
Thu Sep 28, 2017 10:57 pm
Forum: General and Support forum
Topic: FORScan PCM reprogramming (as-built) RX-8 (+other Mazdas...)
Replies: 100
Views: 128147

Re: FORScan PCM reprogramming (as-built) RX-8 (+other Mazdas

Sorry, one last question: Is there any way to verify that the PCM3 line has in fact changed? - maybe the write failed on the M-MDS. I tried directly entering the AT commands from the log down to the "2100", but as mentioned just got a brief response rather than the expected data block. Would running...
by bretman
Thu Sep 28, 2017 10:48 pm
Forum: General and Support forum
Topic: FORScan PCM reprogramming (as-built) RX-8 (+other Mazdas...)
Replies: 100
Views: 128147

Re: FORScan PCM reprogramming (as-built) RX-8 (+other Mazdas

Yes, I agree - I wonder if it could be my interface. Not a problem, though, as I have the change made now on the PCM via the dealer. As to whether its the right bit, I've double checked multiple VINs for PCM 1-9 and the bit I changed is literally the ONLY bit that differs between the models with and...