Audi A3

[ray978]

hello friends, I have this problem. can anyone help me?
I tested the resistance on the injectors and ok.
sorry for my bad English
thanks


VCDS
Self-Diagnosis Log
Monday,20,December,2010,10:54:08:63170


Address 01: Engine Labels: Redir Fail!
Part No SW: 03G 906 018 DH HW: 03G 906 018 DH
Component: R4 2.0l PPD1.2 1185
Revision: --H42--- Serial number:
Coding: 0000072
Shop #: WSC 00152 264 92782
3 Faults Found:

004160 - Supply Voltage A for Injectors: Circuit Malfunction
P1040 - 006 - Short to Plus - Intermittent

008518 - Supply Voltage for Fuel Injector Group A: Open Circuit
P2146 - 009 - Open or Short to Ground

05399 power supply relay for ecu (j271 or j363) electrical
malfunction P1517 short with ground intermmitent.

[Liteace]

Test the resistance of the injector pins to injector body and see what you get

[ray978]

Test the resistance of the injector pins to injector body and see what you get


you get about 200 kohm on all injectors

[Larue]

you get about 200 kohm on all injectors
I that car starting?
Is this Siemens Engine Management System?
1. Check wiring plugs ( including plugs on ECU),
2. If car isn't starting try to disconnect injectors one by one and see if it will starts on three cylinders. If Yes - there is a problem with disconnected injector.
:wavey:

[ray978]

I that car starting?
Is this Siemens Engine Management System?
1. Check wiring plugs ( including plugs on ECU),
2. If car isn't starting try to disconnect injectors one by one and see if it will starts on three cylinders. If Yes - there is a problem with disconnected injector.
:wavey:

yes siemens.
wiring ok.
the engine will not start if unplug one at a time.
Oscilloscope voltage that is right for a short time then stops the signal.

[Larue]

Hmmm....if all grounds, power supplies to ECU are good, that's sounds for me like ECU fault, just would be interesting to check these things at that time when it's loosing injection signal. Have seen wiring faults on these.

[ray978]

I'm desperate. The ECU sends a signal that then stop while you try to start the engine. all voltages seem ok ...
ECU already has happened that is out of order?

[Liteace]

What year and engine size is the A3 ?

[Ashraf6119]

Hi

Have you tried to replace the ECU relay j271 or j363 which is in Engine bay fuse box ( Relay Position # 1 & #4).

Also if you can post the Engine code would be helpful.

Ash

[ray978]

What year and engine size is the A3 ?

year 2006
125 kw
litres 2,0 TDI
engine BMN
int model 8p

[ray978]

Hi

Have you tried to replace the ECU relay j271 or j363 which is in Engine bay fuse box.

Also if you can post the Engine code would be helpful.

Ash


The relay seems to work well.

[MOBILTRONIC]

Hi,mates.If such a resistance then that engine has piezo injectors and if diagnosis by VCDS made such mistakes,1000% error in the injectors.Disconnect one by one injector and monitored with a diagnosis result of elimination of the injector real problems.Perhaps one defect,maybe two but every time when you disconnect each injector attempt to start engine.One or two injectors, which cause problems when you disconnect,the engine can be started.With this we see that the injector is defective.Best regards.

[Ashraf6119]

The relay seems to work well.

Ray,

They may be working well but, have you checked its not shorting and losing its function when you cranking the engine also don't forget those relays are on common fault list for this models.

Ash

[ray978]

ok thanks to all. Tomorrow I try to change the relay ... thanks

[cqae]

the relay does not supply power to these injectors. it is supplied via the ecu. When it gets shorted to ground the ecu stops suppling voltage to all injectors to protect itself. try disconnecting the main plug that goes into the engine incase it is shorted which definately happens. also try just conencting the injectors one at a time, I have seen these with mroe that 1 shorted injector.

[ray978]

hello friends, identified the problem ... ECU is an injector fault. injector is a short circuit but he is still out of order. ECU repaired. I now seeking a primer on low-cost ... Thanks to all
;-)