I'm at a complete loss on diagnosing this thing any further. This car will start and idle just fine, and leave the driveway and cruise just fine. All of a sudden i will lose all power as if the key was cut off for a TENTH of a second. The car will of course buck and the EPC and CEL light will kick on. Also if im running VCDS, i will lose comms with the module im logging (in this case engine). Its clear the ECM is losing power because if i had a check engine light pre-existing, it would be gone. It is very hard to reproduce this error but it is prone to doing it when shifting, which is telling me a connection is lose but i've SCOURED every connection and come up empty. The only connection i can not find is ground connection 121. All it says is it's "Ground Connection 2 (in right front wiring harness)". I've replaced the Fuel and ECM relays.
Also this happens with the MAF unplugged as well. Granted its not quite as bad, it still does it between shifts and at throttle tip-in.
Below are my codes, luckily the ABS module caught something
VCDS Version: Release 14.10.1 (x64)
Data version: 20150130
USRT
Tuesday,17,February,2015,20:18:44:00899
Chassis Type: 8E (8E - Audi A4/S4/RS4 B6/B7 (2001 > 2008))
Scan: 01 02 03 08 09 0F 11 15 16 17 18 25 36 37 45 46 55 56 57 65
67 69 75 76 77
VIN: WAUGL58E35A520761 Mileage: 146530km-91049miles
-------------------------------------------------------------------------------
Address 01: Engine Labels: 079-910-560-BBK.lbl
Part No SW: 8E0 910 560 K HW: 4E0 907 560
Component: 4.2L V8/5V G 0010
Revision: --H01--- Serial number:
Coding: 0007711
Shop #: WSC 06335 000 00000
VCID: 2D51D6BAB412BD49F56-8078
No fault code found.
Readiness: 0000 0101
-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 8E0-910-517.clb
Part No SW: 8E0 910 517 C HW: 8E0 614 517 BB
Component: ESP8 quattro H04 0180
Revision: 00000000 Serial number: 00000000000000
Coding: 0004901
Shop #: WSC 06335 000 00000
VCID: 275D249296EE97190FA-8072
4 Faults Found:
01314 - Engine Control Module
008 - Implausible Signal - Intermittent
01826 - Sensor for Steering Angle (G85); Supply Voltage Terminal 30
000 - - - Intermittent
01312 - Powertrain Data Bus
014 - Defective - Intermittent
18265 - Load Signal
P1857 - 000 - Error Message from ECU - Intermittent
-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 8E0-820-043.lbl
Part No: 8E0 820 043 AM
Component: A4 Klimaautomat 2731
Coding: 00000
Shop #: WSC 00000
VCID: 6CD71BBE1C887441A28-5124
No fault code found.
-------------------------------------------------------------------------------
Address 09: Cent. Elect. Labels: 8E0-907-279-8EC.lbl
Part No: 8E0 907 279 J
Component: int. Lastmodul USA 0503
Coding: 01023
Shop #: WSC 65536
VCID: 3979F2EA235A11E969E-4B00
No fault code found.
-------------------------------------------------------------------------------
Address 15: Airbags Labels: 8E0-959-655-94.lbl
Part No SW: 8E0 959 655 H HW: 8E0 959 655 H
Component: Airbag 9.41 H10 3230
Revision: 91H10323 Serial number: 0036N000CWJ9
Coding: 0032707
Shop #: WSC 06335 000 00000
VCID: 3C77EBFE7F6824C1728-8069
Subsystem 1 - Part No: 8E0 910 339 B
Component: BF-Gewichtsens. 02 0070
Serial number: 6332DRB401818618G
Coding: 00032707
Subsystem 2 - Serial number: 6342DRB401829425F
Subsystem 3 - Serial number: 6352ARB4003B259CO
Subsystem 4 - Serial number: 6362ARB4003B62308
Subsystem 5 - Serial number: 63729RB4005238089
Subsystem 6 - Serial number: 63829RB400523AC9P
9 Faults Found:
01794 - Control Module - Incorrect Chassis (VIN) Number
000 - - - Intermittent
00532 - Supply Voltage B+
002 - Lower Limit Exceeded - Intermittent
01316 - ABS Control Module
008 - Implausible Signal - Intermittent
01639 - Crash-Sensor for Side Airbag; Rear Passenger Side (G257)
014 - Defective - Intermittent
01316 - ABS Control Module
004 - No Signal/Communication - Intermittent
01317 - Control Module in Instrument Cluster (J285)
004 - No Signal/Communication - Intermittent
00474 - Control Module for Immobilizer
004 - No Signal/Communication - Intermittent
01738 - Crash Sensor for Front Airbag; Drivers Side (G283)
011 - Open Circuit - Intermittent
01739 - Crash Sensor for Front Airbag; Pass. Side (G284)
011 - Open Circuit - Intermittent
-------------------------------------------------------------------------------
Address 16: Steering wheel Labels: 8E0-953-549.lbl
Part No: 8E0 953 549 Q
Component: Lenksáulenmodul 0601
Coding: 02041
Shop #: WSC 06335
VCID: 41899A0A4B8A492921E-4B00
No fault code found.
-------------------------------------------------------------------------------
Address 17: Instruments Labels: 8E0-920-9xx-8EC.lbl
Part No SW: 8E0 920 981 Q HW: 8E0 920 981 Q
Component: KOMBI+WFS 4 H12 0040
Revision: 0040 Serial number: 00000000000000
Coding: 0023201
Shop #: WSC 02301 444 10073
VCID: 3B75E8E2796623F97B2-5124
6 Faults Found:
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent
01316 - ABS Control Module
004 - No Signal/Communication - Intermittent
01321 - Control Module for Airbags (J234)
004 - No Signal/Communication - Intermittent
01771 - Control Module for Headlight Range (J431)
004 - No Signal/Communication - Intermittent
01304 - Radio
004 - No Signal/Communication - Intermittent
01303 - Telephone Transceiver (R36)
004 - No Signal/Communication
-------------------------------------------------------------------------------
Address 25: Immobilizer Labels: 8E0-920-9xx-8EC.lbl
Part No SW: 8E0 920 981 Q HW: 8E0 920 981 Q
Component: KOMBI+WFS 4 H12 0040
Revision: 0040 Serial number: 00000000000000
Coding: 0023201
Shop #: WSC 02301 444 10073
VCID: 3B75E8E2796623F97B2-5142
6 Faults Found:
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent
01316 - ABS Control Module
004 - No Signal/Communication - Intermittent
01321 - Control Module for Airbags (J234)
004 - No Signal/Communication - Intermittent
01771 - Control Module for Headlight Range (J431)
004 - No Signal/Communication - Intermittent
01304 - Radio
004 - No Signal/Communication - Intermittent
01303 - Telephone Transceiver (R36)
004 - No Signal/Communication
-------------------------------------------------------------------------------
Address 36: Seat Mem. Drvr Labels: 8E0-959-760.lbl
Part No: 8E0 959 760
Component: Sitzmemory R2 F 0305
Coding: 00002
Shop #: WSC 00000
VCID: 71E90ACA3BAA99A991E-4AE8
No fault code found.
-------------------------------------------------------------------------------
Address 37: Navigation Labels: 8E0-035-192-RNSE.lbl
Part No SW: 8E0 035 192 E HW: 8E0 035 192 E
Component: RNS-E HIGH EU H54 0650
Revision: 03S Serial number: AUZBZ7E1501313
Coding: 0309137
Shop #: WSC 06335 000 00000
VCID: 2643299692E48E1134C-515E
No fault code found.
-------------------------------------------------------------------------------
Address 46: Central Conv. Labels: 8E0-959-433-MAX.lbl
Part No: 8E0 959 433 BT
Component: Komfortgerát T7B 3232
Coding: 16232
Shop #: WSC 06335
VCID: 0407531E14189C014A8-4AE8
Subsystem 1 - Part No: 8E1959801F
Component: Tõrsteuer.FS BRM 1315
Subsystem 2 - Part No: 8E1959802E
Component: Tõrsteuer.BF BRM 0205
Subsystem 3 - Part No: 8E0959801A
Component: Tõrsteuer.HL BRM 0205
Subsystem 4 - Part No: 8E0959802A
Component: Tõrsteuer.HR BRM 0205
17 Faults Found:
01331 - Door Control Module; Driver Side (J386)
49-10 - No Communications - Intermittent
01332 - Door Control Module; Passenger Side (J387)
49-10 - No Communications - Intermittent
01333 - Door Control Module; Rear Left (J388)
49-10 - No Communications - Intermittent
01334 - Door Control Module; Rear Right (J389)
49-10 - No Communications - Intermittent
01317 - Control Module in Instrument Cluster (J285)
49-10 - No Communications - Intermittent
01320 - Control Module for Climatronic (J255)
49-10 - No Communications - Intermittent
01336 - Company Data Bus for Comfort System
37-10 - Faulty - Intermittent
00962 - Alarm via. Tilt Sensor
35-00 - -
01369 - Alarm triggered by Hood Switch
35-00 - -
01371 - Alarm triggered by Door Contact Switch; Driver's Side
35-00 - -
01574 - Alarm triggered by Door Contact Switch; Rear Right
35-00 - -
00955 - Key 1
35-10 - - - Intermittent
00956 - Key 2
35-00 - -
01403 - Glass-Break Sensors; Rear
36-10 - Open Circuit - Intermittent
00532 - Supply Voltage B+
37-10 - Faulty - Intermittent
00466 - Control Module for Steering Column Electronics (J527)
49-10 - No Communications - Intermittent
00457 - Control Module for Network (J519)
49-10 - No Communications - Intermittent
-------------------------------------------------------------------------------
Address 55: Headlight Range Labels: 4F0-910-357.lbl
Part No SW: 4F0 910 357 E HW: 4F0 907 357 E
Component: AFS 1 H01 0010
Revision: 00000001 Serial number:
Coding: 0000019
Shop #: WSC 01041 444 52566
VCID: 285F27AE9BF09861060-807D
Subsystem 1 - Part No: 8E0 941 329 A
Component: AFS-Modul links H05 0030
Subsystem 2 - Part No: 8E0 941 329 A
Component: AFS-Modul rechtsH02 0020
1 Fault Found:
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent
-------------------------------------------------------------------------------
Address 56: Radio Labels: 8E0-035-192-RNSE.lbl
Part No SW: 8E0 035 192 E HW: 8E0 035 192 E
Component: RNS-E HIGH EU H54 0650
Revision: 03S Serial number: AUZBZ7E1501313
Coding: 0309137
Shop #: WSC 06335 000 00000
VCID: 2643299692E48E1134C-515E
No fault code found.
End-------------------------(Elapsed Time: 07:11)--------------------------
Also this happens with the MAF unplugged as well. Granted its not quite as bad, it still does it between shifts and at throttle tip-in.
Below are my codes, luckily the ABS module caught something
VCDS Version: Release 14.10.1 (x64)
Data version: 20150130
USRT
Tuesday,17,February,2015,20:18:44:00899
Chassis Type: 8E (8E - Audi A4/S4/RS4 B6/B7 (2001 > 2008))
Scan: 01 02 03 08 09 0F 11 15 16 17 18 25 36 37 45 46 55 56 57 65
67 69 75 76 77
VIN: WAUGL58E35A520761 Mileage: 146530km-91049miles
-------------------------------------------------------------------------------
Address 01: Engine Labels: 079-910-560-BBK.lbl
Part No SW: 8E0 910 560 K HW: 4E0 907 560
Component: 4.2L V8/5V G 0010
Revision: --H01--- Serial number:
Coding: 0007711
Shop #: WSC 06335 000 00000
VCID: 2D51D6BAB412BD49F56-8078
No fault code found.
Readiness: 0000 0101
-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 8E0-910-517.clb
Part No SW: 8E0 910 517 C HW: 8E0 614 517 BB
Component: ESP8 quattro H04 0180
Revision: 00000000 Serial number: 00000000000000
Coding: 0004901
Shop #: WSC 06335 000 00000
VCID: 275D249296EE97190FA-8072
4 Faults Found:
01314 - Engine Control Module
008 - Implausible Signal - Intermittent
01826 - Sensor for Steering Angle (G85); Supply Voltage Terminal 30
000 - - - Intermittent
01312 - Powertrain Data Bus
014 - Defective - Intermittent
18265 - Load Signal
P1857 - 000 - Error Message from ECU - Intermittent
-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 8E0-820-043.lbl
Part No: 8E0 820 043 AM
Component: A4 Klimaautomat 2731
Coding: 00000
Shop #: WSC 00000
VCID: 6CD71BBE1C887441A28-5124
No fault code found.
-------------------------------------------------------------------------------
Address 09: Cent. Elect. Labels: 8E0-907-279-8EC.lbl
Part No: 8E0 907 279 J
Component: int. Lastmodul USA 0503
Coding: 01023
Shop #: WSC 65536
VCID: 3979F2EA235A11E969E-4B00
No fault code found.
-------------------------------------------------------------------------------
Address 15: Airbags Labels: 8E0-959-655-94.lbl
Part No SW: 8E0 959 655 H HW: 8E0 959 655 H
Component: Airbag 9.41 H10 3230
Revision: 91H10323 Serial number: 0036N000CWJ9
Coding: 0032707
Shop #: WSC 06335 000 00000
VCID: 3C77EBFE7F6824C1728-8069
Subsystem 1 - Part No: 8E0 910 339 B
Component: BF-Gewichtsens. 02 0070
Serial number: 6332DRB401818618G
Coding: 00032707
Subsystem 2 - Serial number: 6342DRB401829425F
Subsystem 3 - Serial number: 6352ARB4003B259CO
Subsystem 4 - Serial number: 6362ARB4003B62308
Subsystem 5 - Serial number: 63729RB4005238089
Subsystem 6 - Serial number: 63829RB400523AC9P
9 Faults Found:
01794 - Control Module - Incorrect Chassis (VIN) Number
000 - - - Intermittent
00532 - Supply Voltage B+
002 - Lower Limit Exceeded - Intermittent
01316 - ABS Control Module
008 - Implausible Signal - Intermittent
01639 - Crash-Sensor for Side Airbag; Rear Passenger Side (G257)
014 - Defective - Intermittent
01316 - ABS Control Module
004 - No Signal/Communication - Intermittent
01317 - Control Module in Instrument Cluster (J285)
004 - No Signal/Communication - Intermittent
00474 - Control Module for Immobilizer
004 - No Signal/Communication - Intermittent
01738 - Crash Sensor for Front Airbag; Drivers Side (G283)
011 - Open Circuit - Intermittent
01739 - Crash Sensor for Front Airbag; Pass. Side (G284)
011 - Open Circuit - Intermittent
-------------------------------------------------------------------------------
Address 16: Steering wheel Labels: 8E0-953-549.lbl
Part No: 8E0 953 549 Q
Component: Lenksáulenmodul 0601
Coding: 02041
Shop #: WSC 06335
VCID: 41899A0A4B8A492921E-4B00
No fault code found.
-------------------------------------------------------------------------------
Address 17: Instruments Labels: 8E0-920-9xx-8EC.lbl
Part No SW: 8E0 920 981 Q HW: 8E0 920 981 Q
Component: KOMBI+WFS 4 H12 0040
Revision: 0040 Serial number: 00000000000000
Coding: 0023201
Shop #: WSC 02301 444 10073
VCID: 3B75E8E2796623F97B2-5124
6 Faults Found:
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent
01316 - ABS Control Module
004 - No Signal/Communication - Intermittent
01321 - Control Module for Airbags (J234)
004 - No Signal/Communication - Intermittent
01771 - Control Module for Headlight Range (J431)
004 - No Signal/Communication - Intermittent
01304 - Radio
004 - No Signal/Communication - Intermittent
01303 - Telephone Transceiver (R36)
004 - No Signal/Communication
-------------------------------------------------------------------------------
Address 25: Immobilizer Labels: 8E0-920-9xx-8EC.lbl
Part No SW: 8E0 920 981 Q HW: 8E0 920 981 Q
Component: KOMBI+WFS 4 H12 0040
Revision: 0040 Serial number: 00000000000000
Coding: 0023201
Shop #: WSC 02301 444 10073
VCID: 3B75E8E2796623F97B2-5142
6 Faults Found:
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent
01316 - ABS Control Module
004 - No Signal/Communication - Intermittent
01321 - Control Module for Airbags (J234)
004 - No Signal/Communication - Intermittent
01771 - Control Module for Headlight Range (J431)
004 - No Signal/Communication - Intermittent
01304 - Radio
004 - No Signal/Communication - Intermittent
01303 - Telephone Transceiver (R36)
004 - No Signal/Communication
-------------------------------------------------------------------------------
Address 36: Seat Mem. Drvr Labels: 8E0-959-760.lbl
Part No: 8E0 959 760
Component: Sitzmemory R2 F 0305
Coding: 00002
Shop #: WSC 00000
VCID: 71E90ACA3BAA99A991E-4AE8
No fault code found.
-------------------------------------------------------------------------------
Address 37: Navigation Labels: 8E0-035-192-RNSE.lbl
Part No SW: 8E0 035 192 E HW: 8E0 035 192 E
Component: RNS-E HIGH EU H54 0650
Revision: 03S Serial number: AUZBZ7E1501313
Coding: 0309137
Shop #: WSC 06335 000 00000
VCID: 2643299692E48E1134C-515E
No fault code found.
-------------------------------------------------------------------------------
Address 46: Central Conv. Labels: 8E0-959-433-MAX.lbl
Part No: 8E0 959 433 BT
Component: Komfortgerát T7B 3232
Coding: 16232
Shop #: WSC 06335
VCID: 0407531E14189C014A8-4AE8
Subsystem 1 - Part No: 8E1959801F
Component: Tõrsteuer.FS BRM 1315
Subsystem 2 - Part No: 8E1959802E
Component: Tõrsteuer.BF BRM 0205
Subsystem 3 - Part No: 8E0959801A
Component: Tõrsteuer.HL BRM 0205
Subsystem 4 - Part No: 8E0959802A
Component: Tõrsteuer.HR BRM 0205
17 Faults Found:
01331 - Door Control Module; Driver Side (J386)
49-10 - No Communications - Intermittent
01332 - Door Control Module; Passenger Side (J387)
49-10 - No Communications - Intermittent
01333 - Door Control Module; Rear Left (J388)
49-10 - No Communications - Intermittent
01334 - Door Control Module; Rear Right (J389)
49-10 - No Communications - Intermittent
01317 - Control Module in Instrument Cluster (J285)
49-10 - No Communications - Intermittent
01320 - Control Module for Climatronic (J255)
49-10 - No Communications - Intermittent
01336 - Company Data Bus for Comfort System
37-10 - Faulty - Intermittent
00962 - Alarm via. Tilt Sensor
35-00 - -
01369 - Alarm triggered by Hood Switch
35-00 - -
01371 - Alarm triggered by Door Contact Switch; Driver's Side
35-00 - -
01574 - Alarm triggered by Door Contact Switch; Rear Right
35-00 - -
00955 - Key 1
35-10 - - - Intermittent
00956 - Key 2
35-00 - -
01403 - Glass-Break Sensors; Rear
36-10 - Open Circuit - Intermittent
00532 - Supply Voltage B+
37-10 - Faulty - Intermittent
00466 - Control Module for Steering Column Electronics (J527)
49-10 - No Communications - Intermittent
00457 - Control Module for Network (J519)
49-10 - No Communications - Intermittent
-------------------------------------------------------------------------------
Address 55: Headlight Range Labels: 4F0-910-357.lbl
Part No SW: 4F0 910 357 E HW: 4F0 907 357 E
Component: AFS 1 H01 0010
Revision: 00000001 Serial number:
Coding: 0000019
Shop #: WSC 01041 444 52566
VCID: 285F27AE9BF09861060-807D
Subsystem 1 - Part No: 8E0 941 329 A
Component: AFS-Modul links H05 0030
Subsystem 2 - Part No: 8E0 941 329 A
Component: AFS-Modul rechtsH02 0020
1 Fault Found:
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent
-------------------------------------------------------------------------------
Address 56: Radio Labels: 8E0-035-192-RNSE.lbl
Part No SW: 8E0 035 192 E HW: 8E0 035 192 E
Component: RNS-E HIGH EU H54 0650
Revision: 03S Serial number: AUZBZ7E1501313
Coding: 0309137
Shop #: WSC 06335 000 00000
VCID: 2643299692E48E1134C-515E
No fault code found.
End-------------------------(Elapsed Time: 07:11)--------------------------
