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Audi A8 wont start help
17-01-2019, 18:30 PM,
Post: #1
Audi A8 wont start help
Hallo I have Audi A8 2001 year 3.3 TDI, crank OK but not start. I scan with VCDS and get error massage like below. Can anyone tell me where to start inspection-

Engine
18310 - After-Run Coolant Fan Control Module (J138) 
            P1902 - 35-00 - Open or Short to Ground
19466 - Relay for Fuel Cooling Pump (J445) 
            P3010 - 35-00 - Open or Short to Ground
19472 - Fuel Bypass Valve (N312) 
            P3016 - 35-00 - Open or Short to Ground
17649 - Fuel Injector for Cylinder 5 (N83) 
            P1241 - 35-00 - Open Circuit
18034 - Powertrain Data Bus 
            P1626 - 35-00 - Missing Message from TCU

and in instrument claster

01314 - Engine Control Module 
            49-10 - No Communications - Intermittent
01315 - Transmission Control Module 
            49-10 - No Communications - Intermittent
00668 - Supply Voltage Terminal 30 
            53-10 - Supply Voltage Too Low - Intermittent
and

01462 - Anti-theft alarm ultra sonic Sensor
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17-01-2019, 19:16 PM,
Post: #2
RE: Audi A8 wont start help
you should start here
01314 - Engine Control Module
           49-10 - No Communications - Intermittent

No help for people not give a feedback
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17-01-2019, 19:38 PM,
Post: #3
RE: Audi A8 wont start help
(17-01-2019, 19:16 PM)loki954 Wrote:  you should start here
01314 - Engine Control Module
           49-10 - No Communications - Intermittent

Thanks for replay, but I have communicatons with ECU with VCDS or other scan tool. I have this error massage in instrument claster.  ECU is 4DO907409A master and 4DO907409B slave and  instruments VDO D29
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17-01-2019, 20:01 PM,
Post: #4
RE: Audi A8 wont start help
you have but the cluster don't have......so no communication no immo no start ...

No help for people not give a feedback
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17-01-2019, 23:01 PM,
Post: #5
RE: Audi A8 wont start help
First step I would replace battery bcs "voltage too low" Then erase faults and check again.

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18-01-2019, 08:36 AM,
Post: #6
RE: Audi A8 wont start help
Now, I cleared all errors, battery OK, and try to start but not success again, then I read errors again but no errors. I dont know what to do.
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18-01-2019, 09:25 AM,
Post: #7
RE: Audi A8 wont start help
Scan complete car with vcds
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18-01-2019, 10:16 AM, (This post was last modified: 18-01-2019, 10:18 AM by apoelistas.)
Post: #8
RE: Audi A8 wont start help
Yes do a complete VCDs scan which takes about 1 minute. Then attach your complete VCDs scan text log here.
(erase vin)

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18-01-2019, 12:01 PM,
Post: #9
RE: Audi A8 wont start help
Now ,2 hours afther I tryed to start car, I again scan and I have this error below:
Friday,18,January,2019,12:07:49:39744

VIN: WAUZZZ
Mileage: 395870km-245982mi Repair Order:

Chassis Type: 4D (4D - Audi A8 D2 (1994 > 2003))
Scan: 25 01 03 08 11 15 16 17 18 35 37 45 55 56 57 65 67 75 76 77
02

VIN: WAUZZZ4DZ1N004925 Mileage: 395870km-245982miles
-------------------------------------------------------------------------------
Address 01: Engine Labels: None
Part No: 4D0 907 409 A
Component: 3.3l/4VTEDC G400AG D04
Coding: 00016
Shop #: WSC 02435
VCID: 26442DDAC27C4D71B3-4A3A
WAUZZZ4DZ1N004925 AUZ7Z0Y1573116

5 Faults Found:
17687 - Valve for Fuel Metering (N290)
P1279 - 35-10 - Open or Short to Ground - Intermittent
19466 - Relay for Fuel Cooling Pump (J445)
P3010 - 35-00 - Open or Short to Ground
19470 - Boost Pressure Regulator Valve 2 (N274)
P3014 - 35-10 - Open or Short to Ground - Intermittent
18328 - Engine Mount Solenoid Valves (N144) / (N145)
P1920 - 35-00 - Open or Short to Ground
17957 - Boost Pressure Regulation Valve (N75)
P1549 - 35-10 - Open or Short to Ground - Intermittent
Readiness: N/A


-------------------------------------------------------------------------------
Address 11: Engine II Labels: None
Part No: 4D0 907 409 B
Component: 3.3l/4VTEDC 0000AG D03
Coding: 00016
Shop #: WSC 02435
VCID: 275A20DEC576547988-4A3A

4 Faults Found:
19466 - Relay for Fuel Cooling Pump (J445)
P3010 - 35-00 - Open or Short to Ground
17687 - Valve for Fuel Metering (N290)
P1279 - 35-10 - Open or Short to Ground - Intermittent
19468 - Relay for Fuel Pump 2 (J49)
P3012 - 35-00 - Open or Short to Ground
19472 - Fuel Bypass Valve (N312)
P3016 - 35-10 - Open or Short to Ground - Intermittent
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18-01-2019, 12:27 PM,
Post: #10
RE: Audi A8 wont start help
Check fuses then check relays j445, j49. Then let us know.

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