3200GT DTCs

[javier]

Hello,
I've been able to read and clear DTCs on my 1999 3200GT (pre-OBDII), and I've got the codes that I write below. I suppose that some of them really are due to the fact that my mechanic has done some repairs and has not read nor clear error codes, but however I will see if they appear again. The codes are:

P0353 - generic DTC, Ignition coil C primary/secondary circuit fault
P0356 - generic DTC, Ignition coil F primary/secondary circuit fault
P0357 - generic DTC, Ignition coil G primary/secondary circuit fault
P0358 - generic DTC, Ignition coil H primary/secondary circuit fault
P1226 - manufacturer specific DTC (accelerator pedal travel sensor? this is my google finding but not sure...)
P0500 - generic DTC, vehicle speed sensor 'A'
P0700 - generic DTC, Transmission Control System, MIL Request
P1665 - manufacturer specific DTC (brake pedal switch error? this is my google finding but not sure...)

I will see if one of these codes comes back again, and hope to locate the 'erratic' CEL light that I've from time to time. Also, anybody of you could confirm if that is the correct meaning of the two manufacturer specific codes?

Best regards,

Javier

 

[LeeH]

Hi

I recently had a P1226 and also P0226 ( I now have a glove box size OBD II reader) and it appears this points to the Throttle Body which is a common fault with these.

I will be changing to a contactless TB asap.

cheers

Lee

 

[javier]

Hi,
P0226 is a standard DTC, and yes, it seems related to throttle body: http://www.permoveo.ltd.uk/tabid/122/OBD-Error-Code/p0226/Diagnostics/Maserati/Default.aspx
It seems that also the throttle pedal is a common fault...
Regards,
Javier

 

[Emtee]

This has been discussed before at length, but if I recall correctly without any absolute resolution.

The relationship of a TB fault to a TP fault is vague. There's certainly evidence of throttle body failures, and there are two contactless alternatives; Boomerang, who's a member, is a good guy to speak to regarding this, but whether there is ACTUALLY a throttle pot failure, rather than the TB throwing a TP code seems less clear. Start with the TB and then, if necessary after full reset, look at the TP.

Also the brake pedal switch can throw all sorts of codes, as it forms part of the car's whole safety routine. It's a very simple and inexpensive fix.

 

[javier]

Well, I will wait until the codes re-appear and play a bit more around. Another option that perhaps I will try is to induce a TP failure and see which code appears (for sure that an inconsistency in the TP, i.e. different readings from each individual potentiometer in the dual-potentiometer assy. TP has a different code than an inconsistency in the TB readings of its two potentiometers, but the codes are safely guarded by the sacred vestals who holds the top-secret code tables inside the SD2 and SD3 readers)

 

[Emtee]

Well, I will wait until the codes re-appear and play a bit more around. Another option that perhaps I will try is to induce a TP failure and see which code appears (for sure that an inconsistency in the TP, i.e. different readings from each individual potentiometer in the dual-potentiometer assy. TP has a different code than an inconsistency in the TB readings of its two potentiometers, but the codes are safely guarded by the sacred vestals who holds the top-secret code tables inside the SD2 and SD3 readers)

Certainly the SD reader will give you the specific codes, but not all independents have them. An alternative is the Leonardo diagnostic, as this also has the full code set. Recently spend some time playing with one. It's an impressive piece of kit.

 

[javier]

I've got the codes with a KWP2000 reader... but I obtain the number, no the explanation And better don't ask what I've been asked by an independent in Spain for reading the codes...

 

[Emtee]

Sorry Javier, I should have been clearer. Like the Ferrari / Maserati SD system, the Leonardo diagnostic tool has all the manufacturer specific codes with explanations. They've been working on it for years and it also has other high end specific codes sets also, like Lamborghini, Bentley, Porsche etc... If you can find an indi' dealer with one, and more importantly knows what to do to correct the fault, then you might be able to avoid the silly dealer network prices.

 

[javier]

Nothing to sorry, I did understood that the Leonardo includes all! It is also priced accordingly, as per their web page I've not checked the price for reading the codes at a dealer... but I get the idea

 

[conaero]

P0353 Ignition Coil C Primary/Secondary Circuit Malfunction
P0356 Ignition Coil F Primary/Secondary Circuit Malfunction
P0357 Ignition Coil G Primary/Secondary Circuit Malfunction
P0358 Ignition Coil H Primary/Secondary Circuit Malfunction
P1226 Control Sleeve Sensor Malfunction
P0500 Vehicle Speed Sensor Malfunction
P0700 Transmission Control System Malfunction
P1665 ??????

 

[javier]

I see... but I've found that this is a Nissan description, and since it is a manufacturer-specific code, is it also the same for the Maser? (I'm referring to the P1226)

 

[ledlights]

Hi, I've not had any success looking at the DTCs on my 2000 3200GT (I've tried with a cheap ***_COM, 3-pin adapter and UniDiagKWP2000 software setup with 5 baud init and low latency) but I did find a list of OBD codes from an Alfa with a Marelli ECU which might help. PM me if you'd like the file.

Steve

 

[FLORADAEDD]

Hi can i ask how you managed to read the codes if there was no obd socket?? Mine is a 1999 and has the Maerserti plug not a OBD. Thanks Edd

 

[ledlights]

Hi, I managed to read the codes eventually on my 2000 car (thanks Javier and Sander from the Yahoo Unidiag group). The early cars have an OBD port but it is non-standard, the OBDII standard didn't come in until 2001 I think. The port is a grey 3-pin ISO connector behind the carpet on the RHS of the drivers footwell and conforms to the KWP2000 protocol using a slow 5 baud initialisation handshake. If you get hold of a VW Audi Group USB port like this (http://www.ebay.co.uk/itm/***-USB-D...s_Equipment&hash=item4ced5b44c6#ht_3773wt_909) and a 3-pin ISO adapter for a Lancia/Fiat like this (http://www.ebay.co.uk/itm/Fiat-3-pi...s_Equipment&hash=item2311cf30b5#ht_1838wt_909) along with the Unidiag KWP2000 software, it should be possible to read and delete your engine DTCs. You can get hold of the Unidiag software from Sander at the Yahoo group (although I couldn't get hold of him this way) or I can send you a copy or his email address if you PM me. BTW he also sells modified cables for about £30.

It works on my car and I know that it works on others.

Hope this helps,

Steve

 

[rotorheadcase]

Hi Steve,

What changed between your first attempt to connect and when you were finally successful? I have had no joy so far on my 2000 car and have the same cables as you and using UniDiag software with slow init.

Regards,

Neil

 

[conaero]

This has always been the bug bear of the early cars. If anyone does manage to do it, can they do a how to in the Tech section with pics and a list of all the parts and software they used.

It would be appreciated.

 

[ledlights]

The key event for me was in using the correct ISO connector! There are a few of them kicking around under there and I was originally trying to connect to the wrong one..... If you pull down the carpet on the RHS of the driver's footwell there's a grey 3-pin ISO with a cap on it. If you connect to this, connect the red fly-lead of the 3-pin ISO to the +ve battery terminal and start the comms at 5 baud init with the ignition switch on (MAR I think), you see some keyword dialogue at the bottom of the Unidiag window.

In the end I used Sander's cable, but I'll try it again with the ebay cheapie.

I played around with this for a couple of hours before getting it to work, give it another try!

 

[rotorheadcase]

Ahh, so like me you found the "other" ISO connector... I haven't been connecting the red lead on the Fiat adapter to power... This migh be my problem. Which power source did you use in the cabin?

Thanks for the input Steve

Neil

 

[ledlights]

Yes, the red fly-lead powers up the output stage of the device. It doesn't work without it.

Steve

 

[conaero]

Cool guys, can we have some pics of the right and wrong connectors, leads etc...