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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 01-11-2015, 02:37 PM   #1
stefan2m
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Diagnostic cable modding; join or cut+join? FIXED!

=--> found the answer after trial and error, see post #5

To read codes on my former cars, I was always able to borrow someone else's equipment, but I would like to have my own ready when and where I need it.
So I got myself one of those Chinese sets of Carsoft cables and software.

On my 12/'00 320i I've been unable to connect to any other module than the dme using my Carsoft cable and software (from ebay), so have been doing some searching and found that I have to modify the connector ghthat goes into the obd port under the dash.
I have found two (slightly) different mods though; there are people who just bridge pins 7 and 8 and call it a day, and there are people who bridge them too but then also cut the wire to pin 8...
So now I'm wondering what's the definitive answer, or in other words, which of the two mods should I perform on my cable?
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Last edited by stefan2m; 01-31-2015 at 06:00 AM.
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Old 01-21-2015, 02:25 PM   #2
stefan2m
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So.. 155 views and no replies.
Nobody knows?
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Old 01-21-2015, 05:21 PM   #3
stefan2m
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Tried another forum after my last post, had more luck there.
Quote:
Originally Posted by TheEnd
Just join them, the cut to pin 8 is only for F series cars which use pin 8 for an ethernet wake-up signal.

For older cars, it is the body K line diagnostics, and 7 is the powertrain diagnostics.
Source
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Old 01-21-2015, 05:38 PM   #4
LocoCan
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Thanks for the info. My cable is coming in mail. My plan is to program for new LED lights. Get rid of dash errors and hyper flashing.

sent via mobile device.
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Old 01-31-2015, 05:57 AM   #5
stefan2m
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Finally had some time last week to modify the plug and try it out... I just joined the two pins and it wouldn't connect to any module, not even the dme.
Tried again after cutting the wire to pin 8 and now every module on the car is accessible: so bridge pins 7 and 8, then cut wire to pin 8.
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Old 03-04-2015, 05:16 PM   #6
LocoCan
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first attempt with PA Soft - yesterday

So I hooked up the 1.4 scanner to the 323i (2000) yesterday. No joy.

However, I found this post and will try it tomorrow. I'm going to order the 20 pin adapter, however delivery date is 4-6 weeks. (Canada, ya know) and I live on an island.

I can check the pins 7+8 tonight.
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Old 03-04-2015, 05:19 PM   #7
stefan2m
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Tried to read a '98 318i (e46 sedan), could only comnect to the dme from the plug under the dash, the rest had to be done via the round plug under the hood.
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Old 03-06-2015, 12:57 AM   #8
LocoCan
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I ordered the OBD2 16-20 pin converter for the connection under the hood from china supplier. I've made previous purchases from them.

I took apart the BMW scanner, not sure what I'm looking for. Pin 8 had two wires connected and nothing to pin 7. I guess, more research/reading is needed.
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Old 03-06-2015, 09:38 AM   #9
invisible man
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How about just buying the right parts in the first place.

http://www.one-stop-electronics.com/...&product_id=16

and

http://www.one-stop-electronics.com/...&product_id=19
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Old 03-06-2015, 11:45 AM   #10
stefan2m
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A hundred bucks for a cable the average person uses maybe twice a year?
When you use it more often, I'd understand.
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Old 03-06-2015, 12:04 PM   #11
invisible man
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The adapter is only $10 and if you were smart you'd be offering to code people's cars for money. But can't do it now with your hacked-up cable!
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Old 03-06-2015, 01:08 PM   #12
stefan2m
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I'm not saying you're wrong, but:
1. I have no interest in making money of other people, and imo, that has nothing to do with being smart or not.
2. I use my cable(s) for my own vehicle(s) and maybe family a friend if they'd need it.
3. I have no problem accessing any module (so far, after joining K1 and K2 on the flat plug), so I don't see what function I'm missing out on. I'm not interested in very old or in newer BMW's (or any newer car for that matter).

If any of these three points were different, and it helps, I would def consider it.
I think there are enough enthusiasts like me, who do not need professional grade equipment for their personal use.
This topic was meant for those people only.
Why buy a first class train ticket when you're getting of the next stop ten minutes away?
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'98 e39 525tds T - R.I.P. | '94 e34 525iA T - sold | '96 e36 323i coupe - sold | '87 e32 735i (manual/m30) - sold | '88 e34 524td - sold
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Old 03-09-2015, 02:31 AM   #13
LocoCan
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2nd attempt with PA Soft

I bought this BMW scanner for $23 CAN. In my 2nd attempt, I soldered jumpers to the pin #2 and pin #7, plugged those jumpers into the the spot where pin #1 and pin #8 (respectively) connect to the circuit board and reassembled the scanner. No permanent damage to the BMW diagnostic scanner.

I plugged the scanner into the OBD2 plug under the steering wheel. Booted up the laptop. Turned the car ignition to position 1 and plugged in the USB. Started the automobile, Started the software, scanned the modules, No Joy.

I popped the hood and accessed the round 20 pin diagnostic connector under the hood (near the front battery jumping connections). I jumper pins 2-17-20 together, as described in post 6 above. Back to the Laptop, I rescanned the modules, success, I accessed the car modules.

Now, I need to figure out the which LCM (Light Check Module) portion to change for the LED lights. My screen had Cold Check options, however it doesn't display any hot check options. It still hyper - blinked on the turn signal and I observed the hot check quick blink of the brake lights. More learning in order.
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