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DISCUSSION => Electrical => Topic started by: Cristian G in Oz on April 03, 2007, 10:11:56 PM

Title: Another way of getting ECU codes?
Post by: Cristian G in Oz on April 03, 2007, 10:11:56 PM

Does anyone know how to get codes out of the ECU when your car is not fitted with a check engine light or don't have a code reader?

Can anyone tell me which pins in the diagnostic port have the code out signals.

I want to check if any codes are stored in my ECU but can't be bothered taking it to a service joint just to have them plug in their tool, if I can do it!

Failing that does anyone know of a cheap tool or a DIY tool that you can use?

I know these are some big explanation questions, but any info would be appreciated.

Thanks guys.

Cristian

Title: Another way of getting ECU codes?
Post by: bmwman91 on April 03, 2007, 10:15:43 PM

You could always find the pin that fires the check engine light and hook up a small bulb between it & the ground with a .5A fuse?

Title: Another way of getting ECU codes?
Post by: Cristian G in Oz on April 04, 2007, 02:50:56 AM

Quote from: bmwman91;22864

You could always find the pin that fires the check engine light and hook up a small bulb between it & the ground with a .5A fuse?

Now thats a good idea. I didn't think of that.

Anyone know which one it is? I'm guessing you mean the one from teh ECU or dash not the diagnostics port....

Cristian:)

Title: Another way of getting ECU codes?
Post by: Vladi on April 04, 2007, 02:43:00 PM

What pin was that again? :D

Title: Another way of getting ECU codes?
Post by: Whitey on April 09, 2007, 03:56:47 AM

I used to be able to check the fault codes using the blink code system on a previous E30. With the ignition switch on and the engine not running press the accelerator pedal to the floor 5 times in less than 5 seconds. The check engine light stays on for 5 seconds then begins flashing the first fault code. the light flashes once for one, twice for two, etc. There is a 3 second gap between digits. There are four numbers for each fault code, and you need a sheet to determine what the codes apply to. Once the whole code has been displayed the light will stay on for 3 seconds before moving to the next fault code (if any). if the first code is 1444, it means there are no faults stored. Not sure if this works on 318is I haven't tried it yet.:confused:

Title: Another way of getting ECU codes?
Post by: doigal on April 09, 2007, 06:44:01 AM

Quote from: Whitey;23264

snip

OP asked for a way without using the check engine light. I'd be interested in this as well, i dont think many AU spec e30s have one.

Title: Another way of getting ECU codes?
Post by: m44power on April 09, 2007, 08:15:27 AM

this engine light can work on e36's m42 and m44 ? in our cluster we have one free engine light and cars only with OBC use em

Title: Another way of getting ECU codes?
Post by: m44power on April 09, 2007, 08:18:23 AM

By the way ECU Pin 8 is the pin for the check engine bulb

Edit: Just to be more precisly motronic 1.7/3.1 pin 8
Motronic 1.2 pin 15

Title: Another way of getting ECU codes?
Post by: Whitey on April 11, 2007, 08:27:52 AM

Sorry misread. Had a guy show me this before on previous car, and I only remember the 1444 code. :(

Title: Another way of getting ECU codes?
Post by: bmwman91 on April 11, 2007, 12:42:52 PM

Anyone have any luck pulling the codes?

Title: what about any other wires?
Post by: Cristian G in Oz on April 16, 2007, 10:01:51 PM

Quote from: m44power;23275

By the way ECU Pin 8 is the pin for the check engine bulb

Edit: Just to be more precisly motronic 1.7/3.1 pin 8
Motronic 1.2 pin 15

Does the other end go to earth or does it have t go through a circuit on the guage cluster?
If it just oges to earth then it should be easy to rig up a "check light".

Title: not yet......but working on it
Post by: Cristian G in Oz on April 16, 2007, 10:04:32 PM

Quote from: bmwman91;23532

Anyone have any luck pulling the codes?

bmwman91 - I haven't go round to it yet.
I had to work last weekend at the track, timing another marque. It is so boring when there is only 1 E30 going round and even it is not an M42.

Title: Another way of getting ECU codes?
Post by: m44power on April 17, 2007, 05:36:47 PM

Quote from: Cristian G in Oz;23910

Does the other end go to earth or does it have t go through a circuit on the guage cluster?
If it just oges to earth then it should be easy to rig up a "check light".

it goes to bulb (earth)