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Nazrat
Veteran
Date registered: Jun 2009
Location: Northern VA
Vehicle(s): 1994 G320 Europa Import for sale, 2003 G500
Posts: 200
| 1994 G320 (M104) ECU codes
I recently pulled the codes from pin 8 of my 94 G320 using the blink method. I got the following codes: 26, 37, 42. I can't seem to find a list of codes that lists all of those numbers, which makes me suspicious that the code lists may not apply to my vehicle. The closest that I've found is for the W124 cars, which appears to be telling me:
26: N/A on USA vehicles (well, yea. I'd still like to know what it is)
37: Upshift delay switchover valve (Y3/3) open/short circuit (not a big concern)
42: "CAN communication from EA/CC/ISC control module (N4/1) or CC/ISC control module (N4/3) defective" or "CAN communication from ASR control module (N30/1) defective"
Does anyone know where I can find the definitive list for this grey market truck?
Thanks,
Tad |
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Floobydust
Veteran
Date registered: Mar 2014
Location: Massachusetts, USA
Vehicle(s): 1995 E320 Cabrio, 2003 G500, 2000 SL500, 1980 TR8
Posts: 284
| RE: 1994 G320 (M104) ECU codes
Just out of curiosity, has the engine wiring harness in your truck been replaced? The HFM M104's in the W124 were built with the infamous biodegradable "ecco junk" wiring. On the W124, the appearance of multiple, seeming unrelated codes is typically a sign of a degraded harness. I'm not sure if the ecco junk disaster applies to the M104 in the G-wagen application, but I have seen references to "wiring harness replaced" for trucks from that era which have been for sale. |
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DesertStar
Expert
Date registered: Apr 2006
Location: San Diego, CA USA
Vehicle(s): 85-280GE/95-G320/08-G500
Posts: 2156
| Re: 1994 G320 (M104) ECU codes
<p>Is your G a Europa? I thought I read somewhere the ECU were swapped out with one from a W124 that had the same M104 motor... mine was. I have pulled the same codes. I think the code 37 pertains to the upshift delay used on the w124 cars that have the smogpump wwhich delays shift to warm up the cats. The code 42 is for ASR which also found on later 94/95 year w124s.....both items not on our G320. My guess is you have w124 ECU installed , like I do, which cannot communicate with said components as they are not installed. You can search a thread here that talks of the ECU by gerrvz here:</p><p> <span style="font-family: Helvetica; font-size: 12px">http://www.pointedthree.com/disc/forums/showthread.php?tid=22490&posts=49&mid=229404&highlight=1995+g320&highlightmode=1&action=search#M229404</span></p>
Edited by DesertStar 2/11/2017 12:11 PM
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Floobydust
Veteran
Date registered: Mar 2014
Location: Massachusetts, USA
Vehicle(s): 1995 E320 Cabrio, 2003 G500, 2000 SL500, 1980 TR8
Posts: 284
| Re: 1994 G320 (M104) ECU codes
HFM M104 W124s from that time came with or without ASR. I would think that if Europa swapped out the ECUs they would have done so with a non-ASR version of the ECU. ASR cars also have an electronic accelerator "drive by wire" sub-system which would need to be present for the ASR version of the ECU to function properly. Isn't the throttle linkage on the G application is purely mechanical?
Just out of curiosity, do the Europa Gs have a Check Engine light? If so, Europa would have had to do something to implement the upshift delay function as that is embedded deeply into the firmware of the W124 ECU and will set a CEL everytime. |
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Nazrat
Veteran
Date registered: Jun 2009
Location: Northern VA
Vehicle(s): 1994 G320 Europa Import for sale, 2003 G500
Posts: 200
| RE: 1994 G320 (M104) ECU codes
Mine has had the harness replaced. It is not drive-by-wire, and it doesn't have a check engine light. It is a Europa import.
I will open the area around the ECU at some point and see if I can see a part number on the ECU. Thanks for the pointer about the ECU swap possibility. This does have the IR immobilizer, which I thought had to be integrated with the ECU. Is that still the case?
-Tad |
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Floobydust
Veteran
Date registered: Mar 2014
Location: Massachusetts, USA
Vehicle(s): 1995 E320 Cabrio, 2003 G500, 2000 SL500, 1980 TR8
Posts: 284
| RE: 1994 G320 (M104) ECU codes
Nazrat - 2/11/2017 2:07 PM
. . . This does have the IR immobilizer, which I thought had to be integrated with the ECU. Is that still the case?
-Tad
W124's in the US utilized an anti-theft alarm (ATA) driven by door switches rather than the IR found in Europe. In 1996, MB implemented a true ECU based Drive Authorization System (DAS) in the US starting with the M104 used in the W202 chassis (this was also the introduction of OBDII). The W124 system simply disabled the starter circuit. As I understand it, the early European IR systems still relied on an ATA with the IR controller simply replacing the doors switches found on the USA vehicles. The later IR systems (with the lights on the mirror) implemented a true ECU validation for DAS. The exception to this was the European A124 (cabriolet) which used an ECU based validation from the very beginning.
BTW, another source for the Europa ECU swap might be the USA M104 R129.
Edited by Floobydust 2/12/2017 12:00 PM
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DesertStar
Expert
Date registered: Apr 2006
Location: San Diego, CA USA
Vehicle(s): 85-280GE/95-G320/08-G500
Posts: 2156
| Re: 1994 G320 (M104) ECU codes
Nazrat- back to your original question, I have not found any definitive code list. I ended up buying a STAR system to look up codes as have more than one MB to troubleshoot.
I ended purchased an ECU from a 124.032 model to have as backup/spare in case one installed ever craps out. I have the same ECU(124.032) already installed in my G...which is how I received when purchased.
My wiring harness has been replaced, no check engine light installed and was a Europa import.
FWIW :If you did not see the thread I referenced above, I did upload photos of my fault codes(which look similar to yours) that I brought up on the STAR system and my G runs fine (actually really nice) and have not done anything to remedy codes which seem like they do not apply to the G model but may be a result of the ECU I have installed....not saying that is good or bad just my experience.
http://www.pointedthree.com/disc/forums/showthread.php?tid=22490&po... |
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Nazrat
Veteran
Date registered: Jun 2009
Location: Northern VA
Vehicle(s): 1994 G320 Europa Import for sale, 2003 G500
Posts: 200
| Re: 1994 G320 (M104) ECU codes
Thanks for all the good info. I may very well just source a 2nd ECU and try it to have as a spare.
I will note that I checked the codes not because of some issue with the vehicle, but just because I'm going to take it on a road-trip (road rally) and wanted to do my due-diligence before the trip.
Floobydust: That makes me think that I could remove the IR ATA and install a normal RF alarm/remote that triggers the starter relay.
-Tad |
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Floobydust
Veteran
Date registered: Mar 2014
Location: Massachusetts, USA
Vehicle(s): 1995 E320 Cabrio, 2003 G500, 2000 SL500, 1980 TR8
Posts: 284
| Re: 1994 G320 (M104) ECU codes
Nazrat - 2/12/2017 4:48 PM
Floobydust: That makes me think that I could remove the IR ATA and install a normal RF alarm/remote that triggers the starter relay.
-Tad
Yes, if you have the early IR system it's simple matter of providing ground to the K38 relay to enable start, although if the IR system is working, why not stick with the OEM set up?
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Nazrat
Veteran
Date registered: Jun 2009
Location: Northern VA
Vehicle(s): 1994 G320 Europa Import for sale, 2003 G500
Posts: 200
| Re: 1994 G320 (M104) ECU codes
Honestly, tinted windows. It usually takes a few tries to get it to trigger, even with fresh batteries in the remote.
-Tad |
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Nazrat
Veteran
Date registered: Jun 2009
Location: Northern VA
Vehicle(s): 1994 G320 Europa Import for sale, 2003 G500
Posts: 200
| RE: 1994 G320 (M104) ECU codes
Nazrat - 2/11/2017 2:07 PM
Mine has had the harness replaced. It is not drive-by-wire, and it doesn't have a check engine light. It is a Europa import.
I will open the area around the ECU at some point and see if I can see a part number on the ECU. Thanks for the pointer about the ECU swap possibility. This does have the IR immobilizer, which I thought had to be integrated with the ECU. Is that still the case?
-Tad
I pulled the fuse panel down and found that I have a W124 ECU in it, PW: A0165455732
-Tad |
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gerryvz
Extreme Veteran
Date registered: Apr 2014
Location: Annapolis, MD
Vehicle(s): 1994 G320, 1989 560SEC, 1994 E500 (W124)
Posts: 336
| Re: 1994 G320 (M104) ECU codes
Yes, the 1992-1996-era "eco-junk" wiring harnesses found on all MBs from that period DO apply to the G-wagen as well. My 1995 G320 has had its upper harness replaced before I bought it.
An equivalent E320 (HFM W124 M104) ECU **does** work well with the earlier M104 G320 models. As Floob says, starting for the 1996 model year there was a coding system (DAS) that ties the ECU to the vehicle and requires special programming.
My stock G320 ECU failed about 1.5 years ago (two cylinders dead; not it wasn't a coil pack) and I replaced it with a non-ASR E320 ECU from 1995, US-spec. It has worked stupendously well since. I have not noticed any difference in running, gas mileage, etc. Plug and play. I detailed this in another thread.
The IR immobilizer is NOT tied to the ECU for 1994 and 1995 model year G320s. It is an independent system.
I have generally been able to apply M104 W124 ECU codes for the G320. The best reference for these codes is on the web site of my friend GSXR, and the PDF is located here: http://www.w124performance.com/docs/mb/diagnostics/DTC_List_W124_M1...
Lastly, gray-market G-wagens imported into the US **do not** have "CHECK ENGINE" lights.
Cheers,
Gerry
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DUTCH
Administrator Doppelgänger
Date registered: Apr 2006
Location: US, GA, Atlanta
Vehicle(s): 2015 Audi Q7 3.0 TDI,2018 Sprinter
Posts: 9963
| Re: 1994 G320 (M104) ECU codes
gerryvz - 2/25/2017 11:10 AM
Lastly, gray-market G-wagens imported into the US **do not** have "CHECK ENGINE" lights.
Cheers,
Gerry
You must be referring only to the G320's. Europa Int'l's G500's most certainly do have a CEL. |
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Floobydust
Veteran
Date registered: Mar 2014
Location: Massachusetts, USA
Vehicle(s): 1995 E320 Cabrio, 2003 G500, 2000 SL500, 1980 TR8
Posts: 284
| Re: 1994 G320 (M104) ECU codes
Gerry -
Thank you for the nice summary. The fact that the 94/95 G320s were not equipped with a Check Engine Light explains a lot. Basically, As a light truck, Europa only had to implement a certain number of emission systems to meet the Federalization requirements. With no CEL present to rat them out, they could just let the ECU store the codes for the systems that were not present or implemented. BTW, do you know if the 94 G320s have cruise control? The presence of the code 42 would make me think not. |
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gerryvz
Extreme Veteran
Date registered: Apr 2014
Location: Annapolis, MD
Vehicle(s): 1994 G320, 1989 560SEC, 1994 E500 (W124)
Posts: 336
| Re: 1994 G320 (M104) ECU codes
DUTCH - 2/25/2017 11:28 AM gerryvz - 2/25/2017 11:10 AM Lastly, gray-market G-wagens imported into the US **do not** have "CHECK ENGINE" lights. Cheers, Gerry You must be referring only to the G320's. Europa Int'l's G500's most certainly do have a CEL.
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gerryvz
Extreme Veteran
Date registered: Apr 2014
Location: Annapolis, MD
Vehicle(s): 1994 G320, 1989 560SEC, 1994 E500 (W124)
Posts: 336
| Re: 1994 G320 (M104) ECU codes
Floobydust - 2/25/2017 12:31 PM Gerry - Thank you for the nice summary. The fact that the 94/95 G320s were not equipped with a Check Engine Light explains a lot. Basically, As a light truck, Europa only had to implement a certain number of emission systems to meet the Federalization requirements. With no CEL present to rat them out, they could just let the ECU store the codes for the systems that were not present or implemented. BTW, do you know if the 94 G320s have cruise control? The presence of the code 42 would make me think not. My early 1995 (produced late 1994) G320 does have cruise control. The stalk's writing is in German.Mine also has the vacuum-adjustable headlights, but that was disabled at the time of importation.
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Otiswesty
Administrator
Date registered: Jun 2007
Location: Portland, Oregon
Vehicle(s): 463.241, 461.213
Posts: 3006
| Re: 1994 G320 (M104) ECU codes
gerryvz - 2/25/2017 8:10 AM
Yes, the 1992-1996-era "eco-junk" wiring harnesses found on all MBs from that period DO apply to the G-wagen as well. My 1995 G320 has had its upper harness replaced before I bought it.
An equivalent E320 (HFM W124 M104) ECU **does** work well with the earlier M104 G320 models. As Floob says, starting for the 1996 model year there was a coding system (DAS) that ties the ECU to the vehicle and requires special programming.
My stock G320 ECU failed about 1.5 years ago (two cylinders dead; not it wasn't a coil pack) and I replaced it with a non-ASR E320 ECU from 1995, US-spec. It has worked stupendously well since. I have not noticed any difference in running, gas mileage, etc. Plug and play. I detailed this in another thread.
The IR immobilizer is NOT tied to the ECU for 1994 and 1995 model year G320s. It is an independent system.
My 1995 G320 has also had the wiring harnes replaced in Germany a couple of years ago.
I am interested in purchasing a spare ECU for the truck as part of a list of spares for long distance travelling. Is there any advice you have in selecting a ECU besides the non-ASR (non-AWD) version? |
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gerryvz
Extreme Veteran
Date registered: Apr 2014
Location: Annapolis, MD
Vehicle(s): 1994 G320, 1989 560SEC, 1994 E500 (W124)
Posts: 336
| Re: 1994 G320 (M104) ECU codes
Any working ECU from a US-spec 1993-1995 E320 sedan or wagon (W124) will work. All of these model year cars had the HFM engine (1993 model year was still called 300E or 300TE, but used the 3.2-liter M104 engine).
These are exceedingly common in wrecking yards and available for typically around $30 (at least here in Houston). The car MUST be a non-ASR car. The way to tell if it has ASR (and thus non-applicable for a G320) is two-fold: the car's speedo will have a small dark square in the center (just below the top arc of the numbers) that has the yellow triangle when lit up; and a larger, more complex ABS/ASR pump as shown in the images below. The ASR pump will have a larger, flat plastic cover.
If the car has either of these characteristics, you have to pass on the ECU. Fortunately, the majority of E320 wagons and sedans DID NOT have ASR as it was an expensive option at the time.
NON-ASR car: https://s28.postimg.org/5hpugh22l/WP_20160313_19_56_56_Pro.jpg
ASR car: https://s28.postimg.org/8nag6okot/1994_E65_Brabus_25.jpg |
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Nazrat
Veteran
Date registered: Jun 2009
Location: Northern VA
Vehicle(s): 1994 G320 Europa Import for sale, 2003 G500
Posts: 200
| RE: 1994 G320 (M104) ECU codes
Two questions:
1) If I buy an ECU with the same part number as the one I have, can I be confident it doesn't have ASR?
2) My fuel door says "BLEIFREI NORMAL" and the Cluster says "Unleaded Fuel Only." The cluster sticker could have been Europa, but the fuel door has to be original. There was a Turkish phone number on the driver's seat base so I assume this may have been sold in or made for the Turkish market. According to the build sheet this M104 is the .996 version and on a few sites I see the 104.996 is listed as having ~210 hp and 9.2"1 compression instead of the 217hp I see listed for the E320 version, with a compression ratio of 10:1. Is this really a lower compression M104 that will chug along on regular?
I thought I asked the fuel question when I bought the truck, but can't seem to find that thread so I apologize for the duplicate question. It just relates to the ECU question I have now. -Tad
Edited by Nazrat 3/5/2017 7:57 PM
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techmogogy
Member
Date registered: Feb 2015
Location: Toronto, Ontario
Vehicle(s): 72 Haflinger, 75 710M Pinzgauer, 96 350GDT
Posts: 25
| Re: 1994 G320 (M104) ECU codes
run your VIN through the EPC and get the details on it vs going off of the various stickers |
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