W202 OBD2 scan tool not connecting

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Dlawrence103
Dernburg Wagon
Posts: 7
Joined: Sat 11 Feb, 2017 12:54 am
Model you own: w202

W202 OBD2 scan tool not connecting

Post by Dlawrence103 » Wed 22 Mar, 2017 6:03 pm

Hi Everybody,

I have recently bought an OBD2 Scan tool (Autel AL619) and a 38 pin adapter to connect the OBD2 to my 1997 W202 C180.

It will not connect to the car, it powers up OK and runs through some test phases, but then says its not connected to the car.

I've ran it with the ignition Off, ignition On, Engine running and nothing works.

has anyone got any ideas?

cheers
Dave Lawrence
Current drives
2004 Landcruiser V8
1997 C180

Past Drives
3 x Landrover Defenders
BMW 735i
Golf GTI MK1
VW Corrado
306 GTI
106 GTI
300zx TT
Celica GT4
Leon Curpra R

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DoubleOmalley
Posts: 1
Joined: Thu 09 Mar, 2017 3:41 pm
Model you own: w203

Re: W202 OBD2 scan tool not connecting

Post by DoubleOmalley » Fri 24 Mar, 2017 10:13 am

Hi
I recently got a wifi one off ebay for $18. It doesn't seem to work every time. Its like it needs to reboot after a successful OBD handshake with the app. And the Carly app can never connect to the car (connects to the adapter fine, just not the car). The iphone app I'm using that works every second time is Fourstroke. Its Canadian and free and not bad. I intend to contact the makers of Carly for Mercedes and ask them whats going on.

00

johnkearney
Posts: 2
Joined: Wed 08 Nov, 2017 7:52 pm
Model you own: w202

Re: W202 OBD2 scan tool not connecting

Post by johnkearney » Wed 08 Nov, 2017 8:07 pm

Dave did you sort this out i have same problem for c180 1997

Harvey
Dernburg Wagon
Posts: 6
Joined: Wed 13 Apr, 2016 6:03 am
Model you own: w202

Re: W202 OBD2 scan tool not connecting

Post by Harvey » Sun 03 Dec, 2017 6:55 pm

Dear All
Have 1997 W202 om605 c250td and cant find my obd
Does it have one? Where?
Sincere apologies if I am hijjacking this post

Harvey
Dernburg Wagon
Posts: 6
Joined: Wed 13 Apr, 2016 6:03 am
Model you own: w202

Re: W202 OBD2 scan tool not connecting

Post by Harvey » Sun 03 Dec, 2017 6:58 pm

Dear All
Does my w202 om605 have an obd?

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Ivanerrol
Mercedes Demigod
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Joined: Sat 12 May, 2007 3:21 pm
Model you own: w204
Location: Melbourne

Re: W202 OBD2 scan tool not connecting

Post by Ivanerrol » Sun 03 Dec, 2017 8:36 pm

OBD one half.

You need the Star diagnostic tool to look at this. Mercedes Benz stealership or Independent workshop usually.

Australian MB's didn't get proper OBD until 2001. Unlike the US where it was mandated for 1996.
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Harvey
Dernburg Wagon
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Joined: Wed 13 Apr, 2016 6:03 am
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Re: W202 OBD2 scan tool not connecting

Post by Harvey » Sun 03 Dec, 2017 9:25 pm

Dear Ivan, so do I have some sort of a port? If so where?
Sincerely appreciate your help

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Tony From West Oz
OZBENZ moderator
Posts: 3202
Joined: Mon 20 Jun, 2005 10:04 pm
Model you own: w202
Location: Bedfordale WA

Re: W202 OBD2 scan tool not connecting

Post by Tony From West Oz » Sun 03 Dec, 2017 9:53 pm

The OBD11 port should be just in front of the windscreen on the passenger side of the engine bay. Depending on build year it may have one of 3(?) possible configurations.
Life is a journey, with problems to solve, lessons to learn, but most of all, experiences to enjoy.

'83 W123 300D 325000km (Wife's car Josephine - sold).
'84 W123 300D replaced good OM617 912 with OM617 952 and enjoyed having good acceleration for the first time since first driving a 300D in 2002 - became engine and trans donor for 300CD Turbodiesel conversion. Now parted out.
'86 W124 300D sold (Wife's old car - sold )
'85 W123 300CD, 275 000km (Fatmobile) rebuilt turbodiesel from previous Fatmobile transplanted into 280CE (SOLD)
'99 W202 C250 Turbodiesel (my darling Wife's car - Sold)
'98 W202 C250 Turbodiesel (my car - Sold)
'06 Ssanyong Musso Crew Cab 2WD Ute (OM662 diesel and Auto Transmission)

Harvey
Dernburg Wagon
Posts: 6
Joined: Wed 13 Apr, 2016 6:03 am
Model you own: w202

Re: W202 OBD2 scan tool not connecting

Post by Harvey » Sun 03 Dec, 2017 10:26 pm

Tony From West Oz wrote:
Sun 03 Dec, 2017 9:53 pm
The OBD11 port should be just in front of the windscreen on the passenger side of the engine bay. Depending on build year it may have one of 3(?) possible configurations.
Dear Tony
As per numerous times your wisdom on this and biofuels forums has assisted me. I have mates in WA I need to visit and I tell my girlfriend when we do I need to catch up with this ‘Tony from west oz”and buy him some beers!
Have found the port.
My om605 has been running straight veggie for a year and recently starts Rough for 2minutes, with the glow light remaining on for 50 seconds after start up. Hopefully a young mechanic friend can hook into the port and find something.
Thanks mate

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Tony From West Oz
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Re: W202 OBD2 scan tool not connecting

Post by Tony From West Oz » Mon 04 Dec, 2017 12:25 am

Harvey.
The GP lamp staying on after starting is an indication of a blown GP. This is confirmed by the rough running after cold starts.
The GP relay is under the washer reservoir. Undo the black plastic nut on the top of the reservoir and put it to one side. Remove the cover of the GP Relay (pulls off upwards) and remove the large connector. It has 5 pins, which I need glasses to see the labeling, but each pin is numbered to correspond with the individual GPs. Get a multimeter and check the resistance of the test leads, this should be less than 1 ohm. Test GP resistance from each pin to ground (use the engine as your ground for the meter) these should be around 0.5 - 5 ohms (cold) when you subtract the test lead resistance. Normally it is easy to spot the faulty GP as it will be well over 10 ohms. Remove the faulty GP carefully (tighten before loosening to ensure the threads are not binding - leading to a snapped GP in the head - like I had).
Install a new GP and reconnect the lead, plug, cover on the GP relay and replace the washer reservoir.
Start the engine and you will see an immediate difference in idle and the GP lamp will go out when the engine is running.
Life is a journey, with problems to solve, lessons to learn, but most of all, experiences to enjoy.

'83 W123 300D 325000km (Wife's car Josephine - sold).
'84 W123 300D replaced good OM617 912 with OM617 952 and enjoyed having good acceleration for the first time since first driving a 300D in 2002 - became engine and trans donor for 300CD Turbodiesel conversion. Now parted out.
'86 W124 300D sold (Wife's old car - sold )
'85 W123 300CD, 275 000km (Fatmobile) rebuilt turbodiesel from previous Fatmobile transplanted into 280CE (SOLD)
'99 W202 C250 Turbodiesel (my darling Wife's car - Sold)
'98 W202 C250 Turbodiesel (my car - Sold)
'06 Ssanyong Musso Crew Cab 2WD Ute (OM662 diesel and Auto Transmission)

Harvey
Dernburg Wagon
Posts: 6
Joined: Wed 13 Apr, 2016 6:03 am
Model you own: w202

Re: W202 OBD2 scan tool not connecting

Post by Harvey » Mon 04 Dec, 2017 11:10 pm

Repaired Exactly as you described Tony. Sincere Thanks.
Interestingly the GP came out easy, and was lovely and clean. Where is all this carbon glueing that is spoken about? Is it only on OM605 running mineral diesel? Perhaps more people should take the used wvo from their local sushi shop, filter and refuel as I do?
I do have water injection that I hope cleans cylinder build ups. Perhaps it works?
Kind regards to all.

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Tony From West Oz
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Joined: Mon 20 Jun, 2005 10:04 pm
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Location: Bedfordale WA

Re: W202 OBD2 scan tool not connecting

Post by Tony From West Oz » Mon 04 Dec, 2017 11:49 pm

The carbonisation on GP threads seems to be due to lack of correct tension when installing the GP. Some fuel / partially burnt fuel travels past the seal of the GP to the head and ends up in the GP thread. Over time the build-up cokes up and siezes the GP in the head.
Tony
Life is a journey, with problems to solve, lessons to learn, but most of all, experiences to enjoy.

'83 W123 300D 325000km (Wife's car Josephine - sold).
'84 W123 300D replaced good OM617 912 with OM617 952 and enjoyed having good acceleration for the first time since first driving a 300D in 2002 - became engine and trans donor for 300CD Turbodiesel conversion. Now parted out.
'86 W124 300D sold (Wife's old car - sold )
'85 W123 300CD, 275 000km (Fatmobile) rebuilt turbodiesel from previous Fatmobile transplanted into 280CE (SOLD)
'99 W202 C250 Turbodiesel (my darling Wife's car - Sold)
'98 W202 C250 Turbodiesel (my car - Sold)
'06 Ssanyong Musso Crew Cab 2WD Ute (OM662 diesel and Auto Transmission)

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