Search found 51 matches

by jaf
19 Jan 2014, 11:50
Forum: ECU Tuning
Topic: QR25DE Tuning
Replies: 104
Views: 357885

Re: QR25DE Tuning

I probably wasn't too clear on that point: 8688 and 8689 are indeed the 10 bit output of the throttle or pedal sensor - which one, I can't say for sure but I have a feeling it is throttle since the numbers are different when the engine is running. AB8A could be a low temperature set point - can't te...
by jaf
18 Jan 2014, 15:53
Forum: ECU Tuning
Topic: QR25DE Tuning
Replies: 104
Views: 357885

Re: QR25DE Tuning

Here are the outcomes for Address Watch: FFFF8488: Continuously updating values. Min D, Max 6A. Behaves like load value. FFFF86F2: Not continuously updating. 0 on decel or cruise, FF or thereabouts on accelerating. FFFF86B2: Activity only on throttle tip in. Min 0, max 4. Normally 0 on steady state....
by jaf
14 Jan 2014, 19:59
Forum: ECU Tuning
Topic: QR25DE Tuning
Replies: 104
Views: 357885

Re: QR25DE Tuning

Keep the requests coming..... I will test what I can on the coming weekend. I'll update the definition text file as new discoveries are made and repost it from time to time. I left out a bunch of structures that are unknowns at present. Is it useful to add them in as unknowns? Any guesses on the 709...
by jaf
13 Jan 2014, 20:23
Forum: ECU Tuning
Topic: QR25DE Tuning
Replies: 104
Views: 357885

Re: QR25DE Tuning

Good idea Tom. I'll give that a go next weekend and report back on what I find. Any thing else discovered on the 350gt front that may help here?
I wonder if there a similar address in the X-Trail code that is read to decide on which ign table to use?
by jaf
12 Jan 2014, 16:27
Forum: ECU Tuning
Topic: QR25DE Tuning
Replies: 104
Views: 357885

Re: QR25DE Tuning

O.K, see attached definitions found so far. Some confirmation is still needed but it there's plenty to play with for now. There may well be remnants in this code for multiple models just to confuse the issue. I have been fooled a few times. The exact same ECU does the QX5.6 V8 which would have bank1...
by jaf
12 Jan 2014, 13:03
Forum: ECU Tuning
Topic: QR25DE Tuning
Replies: 104
Views: 357885

Re: QR25DE Tuning

OBDII socket wiring is different on the X-Trail then with 2 extra wires in SCI Rx and SCI Tx positions. This is like older OBDI Nissans but without the CLK pin which the SH7055 doesn't need as it will auto sync. For AFR Maps, axis are now confirmed to be 7D22 = rpm and 7D46 = load. I think the ecu i...
by jaf
12 Jan 2014, 09:09
Forum: ECU Tuning
Topic: QR25DE Tuning
Replies: 104
Views: 357885

Re: QR25DE Tuning

Those last 5 addresses are all 8x8 maps which I can't identify the function.
The OBDII connector is wired up for both K line and SCI Tx and SCI Rx so 2 serial interfaces will be used.
by jaf
11 Jan 2014, 15:44
Forum: ECU Tuning
Topic: QR25DE Tuning
Replies: 104
Views: 357885

Re: QR25DE Tuning

Try your PM now - my first attempt didn't work. L9302 is indeed the ign and injector driver. MC33186 is the throttle motor H-bridge controller. Datasheet readily available on the internet. ECU came out since I have been wanting to try out a different cam timing tune with a lot more top end advance s...
by jaf
11 Jan 2014, 11:14
Forum: ECU Tuning
Topic: QR25DE Tuning
Replies: 104
Views: 357885

Re: QR25DE Tuning

There's an ST L9302-AD driver and an MC33186 around that area of the circuit according to a couple of photos I had taken previously but I won't be able to open the ECM for a while to trace out what pins on the SH7055 are used. Is the NERS software you mention possibly the same as "Nissan_J2534....
by jaf
10 Jan 2014, 19:15
Forum: ECU Tuning
Topic: QR25DE Tuning
Replies: 104
Views: 357885

Re: QR25DE Tuning

Happy for you to add onto this thread. I have little programming ability so can't help in that respect but happy to help wherever possible. The image does show the delayed throttle closure - it is the little ramp at the bottom of the abrupt throttle closure. You get an instant closure down to a cert...