1996 MK3 Golf GTi

   #1  

Gizmo

Verified VCDS User
Verified
Joined
Mar 2, 2014
Messages
101
Reaction score
60
Location
S.E.Kent UK
VCDS Serial number
C?ID=49193
This is the oldest car I have scanned and as such I am not sure if there are meant to be more controllers than what is here?

The symptoms are the car refuses to start, it was running dog rough so after some basic checks - fuel sparks etc, the crank sensor has been changed (for a new one) the car now refuses to start and there are no DTC’s showing for the engine:



Code:
Saturday,15,August,2015,11:38:18:22041VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x86
VCDS Version: 15.7.0.1
Data version: 20150729
www.Ross-Tech.com




VIN:    License Plate: P*** OGK
Mileage:    Repair Order: 1






--------------------------------------------------------------------------------
--------------------------------------------------------------------------------




Chassis Type: 1H - VW Golf/Vento III (1992 > 1999)
Scan: 01 02 03 08 12 15 25 41 56
 
-------------------------------------------------------------------------------
Address 01: Engine        Labels: 037-906-025-ADY.lbl
   Part No: 037 906 025 R
   Component: SIMOS 4S           2104  
   Coding: 00000
   Shop #: WSC 01317  
   VCID: 22405F7FAE99E82E60-4A52


No fault code found.
Readiness: N/A


-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 3A0-907-379.lbl
   Part No: 3A0 907 379 A
   Component: ABS/EDS ITTAE 20 GI V00  
   Coding: 03604
   Shop #: WSC 00000  
   VCID: 28544D57C8A5027E3E-4A6A


1 Fault Found:
00668 - Supply Voltage Terminal 30 
            16-10 - Signal Outside Specifications - Intermittent


-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 6N0-909-60x-VW2.lbl
   Part No: 6N0 909 603 E
   Component: AIRBAG VW2          V00  
   Coding: 00069
   Shop #: WSC 01317  
   VCID: 346CA927046D769E82-4B32


1 Fault Found:
00532 - Supply Voltage B+ 
            07-10 - Signal too Low - Intermittent


-------------------------------------------------------------------------------
Address 25: Immobilizer        Labels: 1H0-953-257.lbl
   Part No: 1H0 953 257 B
   Component: IMMO VWZ3Z0T1385411 V00  
   Coding: 09600
   Shop #: WSC 00000  
   VCID: 2A50B75FD6A9306E28-4AE6


No fault code found.


End-------------------------(Elapsed Time: 02:28)--------------------------
 
   #2  

Uwe

Benevolent Dictator
Staff member
Joined
Jan 29, 2014
Messages
30,427
Reaction score
21,713
Location
USA
VCDS Serial number
HC100001
Nope, you have one more module in there (the immobilizer) than the 1997 Mk.3 I had when I started this project, 15+ years ago. (US models didn't get immobilizers until model year 2000).

Since your ECU doesn't see a problem, I'm afraid you're going to have to diagnose the no-start condition the old fashioned way. Check the basics: Air, compression, fuel, spark, etc.

-Uwe-
 
   #3  

Gizmo

Verified VCDS User
Verified
Joined
Mar 2, 2014
Messages
101
Reaction score
60
Location
S.E.Kent UK
VCDS Serial number
C?ID=49193
Cheers Uwe :thumbs:
 
   #4  

Jack@European_Parts

NostraJackAss
Joined
Jan 29, 2014
Messages
20,687
Reaction score
8,802
Location
Montgomery, NY, USA
VCDS Serial number
C?ID=57337
Is the battery weak...... seems so?
What is voltage in VCDS during crank....? 0x01-08-002 field 3

What are block values in VCDS static.......please log to determine IAT and ECT + G28 and G40 when cranked and logged?

Compression check?
Blocked air cleaner FOD or torn intake boot for MAF?

Restricted exhaust?

What were historic DTC's when running dog rough?

What is the status of the TV in blocks and have you adapted the TV in VCDS 0x01-04-001.....?
 
Last edited:
   #5  

Gizmo

Verified VCDS User
Verified
Joined
Mar 2, 2014
Messages
101
Reaction score
60
Location
S.E.Kent UK
VCDS Serial number
C?ID=49193
We didn’t go too deep into this time due to a lack of time, the owner complained of rough running a couple of weeks ago (the car is a weekend fun car) so checked the basics, fuel was getting through, he had a power at the ignition coil but not at the plugs, he was going to try a new HT lead on the coil next.

He was concerned it maybe a ECU fault, but with no DTC I said that was unlikely.
The battery power whist scanning was 12.5v(ish) and the car is kept on a battery conditioner (as it is not a daily driver).

Hopefully I will get enough time to look at the car again in a couple of weeks.

I was concerned at the lack of scanned controllers as I assumed there would have been a CECM in the car?
 
   #6  

Jack@European_Parts

NostraJackAss
Joined
Jan 29, 2014
Messages
20,687
Reaction score
8,802
Location
Montgomery, NY, USA
VCDS Serial number
C?ID=57337
So we went from spark to now no spark........?

Very common and was a TSB/Campaign for coil lead and issues with coil + power stage failure due to cracking from heat on firewall.

6N0-905-104 Ignition coil is a big pile of dog turds, and is most likely your issue.

Usually fails due to incorrect R1 ratting on rotor or height from cap to rotor offset.

This coil likes to crack right at the secondary ignition lead due to being in a high vibration area and the motor mounts being worn tug it from engine movement.

It can be insulated with RTV to protect it going forward and acts like a vibration dampener.

No code is common because the ability to see this as a fault in the ECU wasn't detectable.

The ecu uses a math equation to measure balance disruptions to detect misfires in this vehicle via G28.

Beware....... installing an unapproved vendor coil other than genuine, can....... and will blow the ignition driver in the Simos....... just like in the Bosch Motronics here.
 
Last edited:
   #7  

Uwe

Benevolent Dictator
Staff member
Joined
Jan 29, 2014
Messages
30,427
Reaction score
21,713
Location
USA
VCDS Serial number
HC100001
I was concerned at the lack of scanned controllers as I assumed there would have been a CECM in the car?
Nope, an Mk.3 is very early 1990s tech. The CECM is a bunch of relays in the fuse panel, and things like the Central Locking system and Instrument cluster are simply not diagnostic-capable.

-Uwe-
 
   #8  

Gizmo

Verified VCDS User
Verified
Joined
Mar 2, 2014
Messages
101
Reaction score
60
Location
S.E.Kent UK
VCDS Serial number
C?ID=49193
Opps it looks like I missed part of the post out!

Yes it went from running dog rough to (when i got the call a couple of weeks later) to not running at all with no spark.
I will pass the info on to him regarding the coil and lead.
 
Top