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OK,
Trying to figure out what else different between the ECM's. I don't know anymore whats else different with fuel delivery, unless someone here know for sure. At this point, I would swap the ECM's and see what happens? Its risky, and please disconnect batteries, before even disconnect them. I had too many experiences of ECM's going bad on vehicles with 12V on, while pulling them.
I've tried swapping the MAF sensor but still no change, I measured the voltage at the 7-12 injector, there's only 3.5 volts
can you help me to give wiring diagram ecm1 and ecm2?
When you say there's only 3.5Volts, do you mean at the 'high' side of each injector (which is common to all), or at the low side which is open collector switched individually by the ECU?
(I assume that you mean high side, because 3.5V average at the low side means an awful lot of fuel is flowing!
The high side is fused separately to each bank through a 10Ampere fuse (to each) from a common source in the front fusebox. So only from that fusebox through the engine loom can affect the high side supply.
For experimentation I might be tempted to pull the fuse and substitute my own suitably fused supply direct to the troublesome bank of injectors...
Not sure about using a volt meter to test the injectors?
I am supposing you must have a scope meter to test and see the injection signal.Instead, I would use a different approach such with my Autel MK908P or maybe something as a Ross-Tech VCDS to test with.
I agree that using a 'scope is the ideal way, though too few people understand sampling and consequently get themselves in a terrible pickle, but at the frequencies concerned, a decent AVO will give a pretty good average of the ECU's collector voltage.
From that, if the supply voltage is also measured, then one can work out the duty cycle and hence how much fuel should be flowing.
Using this technique, back in the day I used to use an AVO to set dwell.
In the case of this VW it really shouldn't be that difficult when one has an 'ideal engine' on the other bank as a benchmark with which to compare.
I can't see how on earth one can test injectors using the Autel or the VCDS because all that they are capable of indicating is what the ECU is reporting that it is commanding, rather than what is actually happening at the other end of the wires.
From what I am looking for, is to use the codes generated from the ECM's (this thread) are giving us and what is reported. These ECM's are giving us a wealth of information which we must understand and know how to use.
LoL.. I did have have first to look up what "AVO" was. Also wanna know what analog voltage is good? I have no idea which number to look for in this case.
The digital analyzers in our world, would look into the ECM and its troubles. Advanced ones, like the ones I mentioned, will give much detail into each component, such as individual fuel injectors. Then helping us understand how to solve codes/values generated to the computer reporting the error(s). After all the errors you having are generated from the ECM in first place?
I still say, try swapping the ECM's and see what happens is not a bad idea at this point.....(lol sue me later)
I've done everything.
I've tried changing the position of ecm1 to ecm 2, the result is that the engine can't start.
the voltage that I measure is the voltage from the ecu to the injector generated from the injector ic in the ecm. I use a digital multitester and the result is 3.5 volts.
I took measurements from the probe (-) multitester attached to the car ground and probe (+) multitester to the 2pin injector cable, this results in ECM 2, while in ECM 1 there is a 12 volt result, here there is a difference between ECM1 and ECM2.
for the input voltage ecm1 and ecm 2 are good, there are 12 volts.
for now I really need the wiring diagram pinout ecm1 and ecm2
can anyone help me to send the wiring diagram of the ecm1 and ecm2 pinout????
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May I respectfully suggest that you have misunderstood how the ECU works:
The ECU does not supply any power to the injectors.
Each ECU provides six open collector 'signal outputs' (i.e. NOT current outputs) which are switched to ground by the ECU in order to cause the injector to switch on.
Therefore the injectors, as I posted previously, should receive a +12V supply from Fuse 1 or 2 (as applicable) in the engine compartment fuse box. All six injectors on each bank receive their supply from the same source.
The voltage at the open collector output should be +12V whilst the injector is closed (transistor off, no current flowing), and 0.6V (i.e. a diode volt) when the injector is switched on.
If your ECU is not properly switching on six injector(s) then you should be looking for a bad earth, or a bad supply.
The likelihood of an ECU having all six output transistors fail at the same time is minimal, hence why I keep banging on about you looking for common current paths.
Having been admonished by a moderator (no, not you Johnny) for posting website URLs, I am not going to paste it, but if you google "IETIS" and "Flying Spares" then you will find a link to where you can buy a DVD containing a factory workshop manual and illustrated parts catalogue, and which contains all necessary circuit diagrams.
Last edited by Dark Green; Jul 23, 2021 at 01:23 PM.
I am grateful, the 7-12 injectors have returned to normal, the 12volt voltage to the injectors already exists and the fault code in ECM2 is gone.
now a new problem appears, if the engine is cold, I turn on the car there is a slight shake and a new fault code appears in ECM 1, if I turn off the car, it keeps turning on again, the shaking disappears.
what else should i do?
this fault code at ecm1 now.
EDIT:
Picture rotation by Johnny
Last edited by Johnny Hotspur GT; Jul 26, 2021 at 04:21 PM.
I am grateful, the 7-12 injectors have returned to normal, the 12volt voltage to the injectors already exists and the fault code in ECM2 is gone.
now a new problem appears, if the engine is cold, I turn on the car there is a slight shake and a new fault code appears in ECM 1, if I turn off the car, it keeps turning on again, the shaking disappears.
what else should i do?
this fault code at ecm1 now.
EDIT:
Picture rotation by Johnny
thanks johnny for rotate my picture 🙏😁
can anyone help me to solve this fault code problem?
For P010600 the recommendations are to check the MAP sensor wiring/functionality and intake plumbing/vacuum lines for loose hoses/connections, leaks and ECM.
Since yours states sporadic, you might check the last occurrence and see if it is prior to whatever you did to fix the 1st problem.
For the second issue, there’s no cross reference bit the below suggests checking out pressure sensor, brake pedal switch, brake lines/fluids, and Ive read, vac hoses.
