ZUKIWORLD Online | Suzuki 4x4 Editorial and Forum
ZUKIWORLD Discussion Forum => Technical Discussion - Beginner / Repair => Topic started by: mbruce on June 11, 2011, 05:54:23 PM
-
Where is the diagnostics plug-in on a 90' Samurai (TBI 1.6L 8/v if it matters).
If it plugs into the ECM.. is there a special way to do it?
Thanks!
-
A 90 Samurai with a 1.6, 8v TBI?
The Samurais were all 1.3, so that didn't come out of the factory that way - so the real question is - what did the engine come out of, and where did the person who did the swap put it?
OK - one of your other posts says a 90 Samurai, with a 92 1.6 engine and the EFI from the 1.3.
First - there may not be a "diagnostic" plug for a computer, and if there is, your new problem is finding a computer that can talk to the ECU, it's not OBDII, so most diagnostic scanners won't pull the codes - you may be stuck with the paper clip & counting the flashes of the check engine light.
Having looked at a couple of the other threads, I can't help but wonder if you're "chasing your tail" - the 1.3 ECU was not designed to run the 1.6 engine, and whilst it may do it, what are the chances of you getting all the quirks out of it?
-
Hmm...well he doesn't really know...so I guess that it does not plug into the ECM? If it doesn't have a plug in is it easy to add or tie into where it should be?
-
You posted whilst I was editing to my post - sorry about that.
I found a diagram for the TBI 1.3 over at Ack's FAQ and that only shows a 4 wire monitor connector - which I believe is the one under the hood where you put the paper clip to get the CEL to flash.
I doubt that there is a diagnostic port - however - if there is one, it should be under the driver's side dash, but it may be a 12 pin connector rather than a 16 pin one, and as I indicated earlier a 90 Suzuki will not be OBDII compliant.
-
That's crummy! My problem is the engine runs when the MAP is unplugged to the motor...when the map is going to motor the engine it backfires, misses, and eventually dies. I replaced the O2 and that wasn't the fix...Im going to test the map to the specs according to the books and go from there...if the map is to spec then I don't know what to do!?!
-
I really appreciate you looking into that for me! My cousin has a pro diagnostics computer and he was going to bring it over tomorrow if he had a place to plug it in. He says it will read odb1 and will give him everything he needs to further diagnose my issue
-
Found it!
-
I like where yours ended up being located. Nice and easy to get to. Out in the open so that you can reach in and go to work.
-
Found it!
That's the "monitor" connector I was referring to - the one you jumper to get the CEL to flash - it has a couple of other uses, another jumper freezes the ignition advance so you can set the timing, and I think there's a way to monitor the O2 sensor duty cycle - but I don't think you can plug a computer into it and get any data.
As far as I know Suzuki used/uses two different connectors for computer connections, a 12 pin connector that is also used by GM for ALDL (please note - Suzuki does not use the ALDL protocol), and the J1962 16 pin connector commonly associated with OBDII, (please note - the presence of the J1962 connector does not mean the vehicle is OBDII compliant)
With regard your cousin's pro diagnostic computer and OBD1 - the big issue is that there is no single OBD1 standard (OBDII is a federally mandated standard), and many manufacturers have differing OBD1 protocols, Suzuki is no different in this regard and their OBD1 protocol is known as SDL or serial data link - there are very few readers available that can communicate with a Suzuki OBD1 ECU.
Take a look at Rhinoman's Suzuki Diagnostic pages (http://www.rhinopower.org/diag/diag_main.html) - there's not been very much work done on the Samurai ECUs, but, and as I said, I'm not certain if your ECU does have a communication port (not all do), but if it does, this software will most likely be able to communicate with it - please note - the software is a work in progress and most likely does not have a configuration file for your ECU, however, with a bit of work you can create your own file.
-
well isn't that a bummer! Of course it is 20yrs old and guess you can't expect 20yr old vehicles to be as electronically advanced as the ones today....
Thanks for your input and help --- i'm going to look into your keywords and see what they mean and how to proceed.
I tested my map sensor and put the results in another thread about my O2 sensor --
At first I was looking to get all the bugs out because I figured it was possible...now I'm just looking for it to run connected to the MAP sensor...heh
-
The Sammy ECU that I have has a diagnostic port although it seems that on some models it wasn't connected externally. A 90 is very early though so it may not have a serial port. The official Suzki tool covers 1991-on but a photo of the ECUs circuit board would help.