2001 1.8T GTI No Communication With ECM Looking For Help

   #1  

Scorpio7d

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Hello. I'm new to the forum and was verified today. This car belongs to my teenage son. A few weeks ago he called me on his way home from work. He said his check engine light was flashing and the car was misfiring badly. He was a few miles from home and had stopped in a parking lot to wait for me to arrive. I did some visual checks and couldn't find anything. Since the check engine light had been on previous to this event due to dirty O2 sensors from a previous catless downpipe (removed a few years ago and stock downpipe reinstalled) I suspected that was the issue. We limped the car home. It was late so the next day we put the car on my lift and I cleaned the O2 sensors. Started the car and we still had a terrible misfire. I didn't have a VCDS cable at the time so I changed the plugs and coil packs. After this the car would no longer start. I checked a few online forums and thought maybe it was the fuel pump relay since the pump wasn't priming when opening the drivers door or turning the key on. We replaced the fuel pump relay and still no start. I didn't want to continue throwing money and parts at the car without a diagnostic scan so I contacted a friend with a VCDS cable. We found the no communication with ECM fault. So back to the forums I went. I tried an ECU relay from my 2002 1.8T GTI and still no start but, I had unhooked the battery to swap the ECU relays and after connecting the battery the fuel pump charged when I opened the drivers door but still no start. Back to the forums I went where I read that unhooking the battery would reset the ECU. After this the fuel pump would only prime after unhooking the battery and re-connecting it. From there I verified there was no spark, injectors weren't pulsing and no fuel pressure and there was 12 volts coming into the ECU. I could not see any broken wires for the coil packs or going to the ECU. As a last ditch effort I ran new ground wires from the passenger inner fender to the engine block, added an additional ground wire from the coil pack ground wire to the block then from the engine block to the negative terminal on the battery and then to the drivers side inner fender and still no start. Now we assumed the ECU was bad so I found a used ECU correct for this car (part #06A 906 032 DL) that I planned to repin to match the instrument cluster using VCDS. Since my son and I really like these cars so well, and I plan to continue owning them I decided I really needed to have my own VCDS cable. Today we installed the used ECU and connected a VAG K+CAN Commander cable to read the pin from the used ECU. I got a no communication fault again. Here is the VCDS auto scan from our car with the the original ECU installed. At this point I've exhausted my trouble shooting knowledge and really need some experienced help. Thanks in advance!


Friday,06,October,2017,14:42:44:04191
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x86
VCDS Version: 17.8.0.1 HEX-V2 CB: 0.4401.4
Data version: 20170721 DS276.2
www.Ross-Tech.com



Code:
Chassis Type: 1J - VW Golf/Bora IV (1998 > 2006)
Scan: 01 02 03 08 15 16 17 19 22 29 35 36 37 39 46 47 55 56 57 75
          76
 VIN: 9BWDD61J214050415
   Mileage: 285850km-177618miles
-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 1C0-907-37x-ASR.lbl
   Part No: 1C0 907 379 D
   Component: ASR FRONT MK60      0103  
   Coding: 0021505
   Shop #: WSC 00001 785 00200
   VCID: 2B03F93DEF1435AFDE8-5184

2 Faults Found:
65535 - Internal Control Module Memory Error 
            012 - Electrical Fault in Circuit - Intermittent
65535 - Internal Control Module Memory Error 
            012 - Electrical Fault in Circuit - Intermittent

-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 6Q0-909-605-VW5.lbl
   Part No: 6Q0 909 605 F
   Component: 07 AIRBAG VW6  0202 0004  
   Coding: 12343
   Shop #: WSC 00001  
   VCID: 3A2DCC79154E9C2755E-4B5C

2 Faults Found:
00532 - Supply Voltage B+ 
            07-10 - Signal too Low - Intermittent
01299 - Diagnostic Interface for Data Bus (J533) 
            49-10 - No Communications - Intermittent

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 1J0-920-xx5-17.lbl
   Part No: 1J0 920 905 J
   Component: A4-KOMBIINSTR. VDO V09   
   Coding: 07232
   Shop #: WSC 05226  
   VCID: 2E05F029D9064087F96-5184

   Subsystem 1 - Part No: IMMO
   Component: IDENTNR: VWZ7Z0Y3069026         
   IMMO-IDENTNR: VWZ7Z0Y3069026       

1 Fault Found:
01314 - Engine Control Module 
            49-00 - No Communications

-------------------------------------------------------------------------------
Address 19: CAN Gateway        Labels: 6N0-909-901-19.lbl
   Part No: 6N0 909 901 
   Component: Gateway K<->CAN    0001  
   Coding: 00006
   Shop #: WSC 00001  
   VCID: 70B92E5103B21677ABA-5184

1 Fault Found:
01314 - Engine Control Module 
            49-00 - No Communications

-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels: 1J0-959-799.lbl
   Part No: 1J0 959 799 AJ
   Component: 62 Zentral-SG Komf. 0001  
   Coding: 00256
   Shop #: WSC 00001  
   VCID: 06556889113628C7616-4B1E

   Subsystem 1 - Part No: 1J1959801C
   Component: 62 Tõrsteuerger. FS0002r  

   Subsystem 2 - Part No: 1J1959802D
   Component: 62 Tõrsteuerger. BF0002r  

3 Faults Found:
00953 - Interior Light Time limit 
            25-10 - Unknown Switch Condition - Intermittent
01331 - Door Control Module; Driver Side (J386) 
            53-10 - Supply Voltage Too Low - Intermittent
01332 - Door Control Module; Passenger Side (J387) 
            53-10 - Supply Voltage Too Low - Intermittent

-------------------------------------------------------------------------------
Address 56: Radio        Labels: 1J0-035-18x-56.lbl
   Part No: 1J0 035 180 D
   Component:  RADIO 3CP         0002  
   Coding: 01403
   Shop #: WSC 05226  
   VCID: 20191E1193D2E6F77BA-4B1E

1 Fault Found:
00855 - Connection to CD changer 
            49-00 - No Communications

End----(Elapsed Time: 05:06, VBatt start/end: 12.1V/12.1V. VIgn 2.1V)------
 
   #2  

Uwe

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The ECU is clearly off-line. Have you verified that it's getting both switched and unswitched power?

Since this is an Immo-2 car, you don't need any PINs to match a replacement ECU.

-Uwe-
 
   #3  

Scorpio7d

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The ECU is clearly off-line. Have you verified that it's getting both switched and unswitched power?

Since this is an Immo-2 car, you don't need any PINs to match a replacement ECU.

-Uwe-
I only checked for unswitched power. Ill have to check for switched power. I forgot to mention I did check all related fuses as well. Great news on the PIN#. I'll check for switched power and report back. Thank you!
 
   #4  

Dana

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I agree, this is an Immo 2 car so locksmith/PIN software would fail to pull a PIN from the engine (Immo 2 doesn't have a ECM PIN) but that new used controller should communicate with VCDS.

Speaking of voltage, I noticed: VIgn 2.1V

End----(Elapsed Time: 05:06, VBatt start/end: 12.1V/12.1V. VIgn 2.1V)------

If you have a voltage drop at the DLC connector that may be resulting in a voltage drop to the Engine module.

Terminal 15 is switched ignition power and those ignition switches often melt-down taking the wiring harness with it. If there isn't anything obviously wrong at the battery connections I would peek under the dash, measure the voltage to the fuses on the side of the dash and consider inspecting the ignition switch and wiring.
 
   #5  

Scorpio7d

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I stand corrected on my previous post. I have switched power at the ECU put no power unswitched.
 
   #6  

Scorpio7d

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I agree, this is an Immo 2 car so locksmith/PIN software would fail to pull a PIN from the engine (Immo 2 doesn't have a ECM PIN) but that new used controller should communicate with VCDS.

Speaking of voltage, I noticed: VIgn 2.1V



If you have a voltage drop at the DLC connector that may be resulting in a voltage drop to the Engine module.

Terminal 15 is switched ignition power and those ignition switches often melt-down taking the wiring harness with it. If there isn't anything obviously wrong at the battery connections I would peek under the dash, measure the voltage to the fuses on the side of the dash and consider inspecting the ignition switch and wiring.

Thank you Dana. I also forgot to mention that I pulled the ignition switch and replaced it with a new one.(I had this problem on my 2002 GTI) There were no signs of any damage to the wiring at the switch. The battery terminals all look good. I'll check voltage at the fuses.
 
   #7  

Scorpio7d

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Well you guys are going to get a good chuckle out of this. When I initially checked the fuses I only checked the 15 amp fuse for the ECU at position 29 not realizing there was also a 10 amp fuse at position 10 for the ECU. When Dana suggested checking the voltage at the fuse panel I took a second look at the fuse panel. Sure enough the 10 amp fuse in position 10 was blown.
I've learned a lot from this whole experience and ended up getting the VCDS cable that I've been thinking about for quite some time. I'm thinking the initial misfire issue my son had was the coil packs and spark plugs. When I pulled the coil packs the spark plug wells were half full of oil which I believe may have caused the misfiring. We changed the valve cover gaskets along with the previously mentioned plugs and coil packs. I'm wondering if the fuse blew because I didn't unhook the battery when I unbolted the ground for the coil wiring. Thanks for the help Uwe and Dana!
 
   #8  

The One

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Well you guys are going to get a good chuckle out of this. When I initially checked the fuses I only checked the 15 amp fuse for the ECU at position 29 not realizing there was also a 10 amp fuse at position 10 for the ECU. When Dana suggested checking the voltage at the fuse panel I took a second look at the fuse panel. Sure enough the 10 amp fuse in position 10 was blown.
I've learned a lot from this whole experience and ended up getting the VCDS cable that I've been thinking about for quite some time. I'm thinking the initial misfire issue my son had was the coil packs and spark plugs. When I pulled the coil packs the spark plug wells were half full of oil which I believe may have caused the misfiring. We changed the valve cover gaskets along with the previously mentioned plugs and coil packs. I'm wondering if the fuse blew because I didn't unhook the battery when I unbolted the ground for the coil wiring. Thanks for the help Uwe and Dana!

Nothing like continually learning mate! :)
 
   #12  

Jack@European_Parts

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I believe the fuse blew when we changed the coil packs and spark plugs. I unbolted the ground wire for the coil pack wiring harness and didn't have the battery disconnected.

In theory could be possible but I would also suspect you will see this again more likely from a heated OXS sensor circuit.

What's the scan data say now and did you run readiness tests for 0x01-04-041 ?

2001 Reflex Silver Golf GTI, 2002 Reflex Silver Golf GTI Stage 2 APR Tune


Hey those are some pretty big bold blue text letters in your signature .........is that tune for stage 2 APR with EPA or CARB exemption for conformity to your knowledge? :D

I'd love to know if your car passed readiness for the CAT?
 
   #14  

Scorpio7d

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In theory could be possible but I would also suspect you will see this again more likely from a heated OXS sensor circuit.

What's the scan data say now and did you run readiness tests for 0x01-04-041 ?





Hey those are some pretty big bold blue text letters in your signature .........is that tune for stage 2 APR with EPA or CARB exemption for conformity to your knowledge? :D

I'd love to know if your car passed readiness for the CAT?
Hi Jack. Are you talking about an O2 sensor when your refer to OXS sensor circuit? I did clean the upstream and downstream O2 sensors when trying to solve the initial issue of the misfire. I wasn't aware of a rediness test for 0x01-04-041. I'm new to all this and appreciate any help I can get.
Here is the scan after I replaced the fuse and got the car running. I cleared all the previous faults before running this scan

Code:
Friday,06,October,2017,18:50:30:04191
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x86
VCDS Version: 17.8.0.1  HEX-V2 CB: 0.4401.4
Data version: 20170721 DS276.2
www.Ross-Tech.com


Mileage: 285850km-177618mi   Repair Order: 


Chassis Type: 1J - VW Golf/Bora IV (1998 > 2006)
Scan: 01 02 03 08 15 16 17 19 22 29 35 36 37 39 46 47 55 56 57 75
          76
 
   Mileage: 285850km-177618miles
-------------------------------------------------------------------------------
Address 01: Engine        Labels: 06A-906-032-AWW.lbl
   Part No: 06A 906 032 DL
   Component: 1.8L R4/5VT     G   0006  
   Coding: 07500
   Shop #: WSC 05050  
   VCID: 6B83393D2A94F5AF9E8-5184

No fault code found.
Readiness: 0110 1101

-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 1C0-907-37x-ASR.lbl
   Part No: 1C0 907 379 D
   Component: ASR FRONT MK60      0103  
   Coding: 0021505
   Shop #: WSC 00001 785 00200
   VCID: 2B03F93DEF1435AFDE8-5184

1 Fault Found:
00283 - ABS Wheel Speed Sensor; Front Left  (G47) 
            012 - Electrical Fault in Circuit

-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 6Q0-909-605-VW5.lbl
   Part No: 6Q0 909 605 F
   Component: 07 AIRBAG VW6  0202 0004  
   Coding: 12343
   Shop #: WSC 00001  
   VCID: 3A2DCC79154E9C2755E-4B5C

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 1J0-920-xx5-17.lbl
   Part No: 1J0 920 905 J
   Component: A4-KOMBIINSTR. VDO V09   
   Coding: 07232
   Shop #: WSC 05226  
   VCID: 2E05F029D9064087F96-5184

   Subsystem 1 - Part No: IMMO
   Component: IDENTNR: VWZ7Z0Y3069026         
   IMMO-IDENTNR: VWZ7Z0Y3069026       

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway        Labels: 6N0-909-901-19.lbl
   Part No: 6N0 909 901 
   Component: Gateway K<->CAN    0001  
   Coding: 00006
   Shop #: WSC 00001  
   VCID: 70B92E5103B21677ABA-5184

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels: 1J0-959-799.lbl
   Part No: 1J0 959 799 AJ
   Component: 62 Zentral-SG Komf. 0001  
   Coding: 00256
   Shop #: WSC 00001  
   VCID: 06556889113628C7616-4B1E

   Subsystem 1 - Part No: 1J1959801C
   Component: 62 Tõrsteuerger. FS0002r  

   Subsystem 2 - Part No: 1J1959802D
   Component: 62 Tõrsteuerger. BF0002B  

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio        Labels: 1J0-035-18x-56.lbl
   Part No: 1J0 035 180 D
   Component:  RADIO 3CP         0002  
   Coding: 01403
   Shop #: WSC 05226  
   VCID: 20191E1193D2E6F77BA-4B1E

No Faults Found
  or DTCs not supported by controller
  or a communication error occurred

End----(Elapsed Time: 05:06, VBatt start/end: 13.6V/13.5V. VIgn 0.0V)------

I purchased the car with the APR tune so I'm not sure about EPA or CARB exemption on the tune.
 
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   #15  

Scorpio7d

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Not anymore. :cool:

-Uwe-

Apologies if I did something against the forum rules. I should have checked to see how large the font was on the signature when I edited it.
 
   #16  

Uwe

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Apologies if I did something against the forum rules. I should have checked to see how large the font was on the signature when I edited it.
No worries. There are no explicit rules regarding signatures. If I see one I can't abide, I'll just fix it. :)

-Uwe-
 
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