Wire Diagram for Cam Sensor into ECU

[sgudino]

So a while back a CEL came on, 2002 Audi A4 B6 1.8L - Control Module Part: 8E0 909 518 F
The code was P0016. The problem was corrected.
in the process of fixing this P0016 the VagCom came back with
2 Faults Found:
17748 - Camshaft Position Sensor (G40) / Engine Speed Sensor (G28)
P1340 - 002 - Incor. Correlation - MIL ON
16725 - Camshaft Position Sensor (G40)
P0341 - 008 - Implausible Signal - Intermittent - MIL ON
I tried to check the VagCom for Camshaft Adjustment (intake) Group 093 & 094 in order to see if maybe the chain was stretched but no signal came back.
I think it might be the (G40) wire broken. I intend to run wires directly as far as possible before the ECU, I want to run the wires (pinned straight to see if that could be the issue.
Looking for a wire diagram for the cam position sensor and really any input from the FORUM GENIUSES or ideas in order to get this done.

[jjvwg]

What was your course of action to fix the P0016? It sounds like whatever you did, the car is timed incorrectly now. I would check belt and chain timing first. To answer your wiring question, pin 3 black wire goes to pin 108 at the ECU, pin 2 green/grey wire goes back to pin 86 at the ECU, and pin 1 white/black wire goes back to pin 98 at the ECU. Pins 1 and 3 tie in with a couple other wires feeding to other sensors at a crimp as well


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[sgudino]

I was also getting a loud metal clanking sound from the back of the engine, so I changed out the CCT (cam chain tensioner), the rattling sound went away and so did P0016. The car runs quiet and smooth. Here is what I did: the timing was adjusted at TDC, replaced tension pulley (since I had it readily available), and cams aligned using the notches and 16 teeth in between.
I can not see on VAGcom, Phase position on camshaft Intake Bank 1, checking for a possible stretched chain, that maybe I might have a broken wire (at or near the connector) that is maybe caused when I changed out the cam position sensor,
Reading from Vagcom in turn is giving me:
17748 - Camshaft Position Sensor (G40) / Engine Speed Sensor (G28)
P1340 - 002 - Incor. Correlation - MIL ON
16725 - Camshaft Position Sensor (G40)
P0341 - 008 - Implausible Signal - Intermittent - MIL ON
I am going to cut open the harness and check for obvious breaks and then pin out the wires and run directly, either way something is wrong as I am not getting information in the VagCom from the cam position sensor.

[jjvwg]

I wouldn’t go hacking up your harness. I’d start with a simple continuity check on those wires to look for a clean break and then you could always just run some temporary wires outside of the harness and tuck them into the connector from the backside to see if you can get a reading on block 93. Could be wiring or a bad sensor. Block 93 will show you if the cam and crank timing are are aligned so it will be interesting to see what that reading shows once you can get it but personally I would double check the belt and chain timing manually right away just to be certain.


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[sgudino]

@jjvwg you make a good point. i will review the belt timing and cams again.

[sgudino]

Reviewed the timing and all markings lined up 100%.
Reviewed the Cam position sensor wiring and retrieved a 5.0V from the sensor harness connector and a 10.6V on the other Pin connection from the incoming power. I noticed the power was less than the battery which is 1 day old and has a voltage of 12.55. WTH is going on?
Does anyone know where I can get a harness for a 2002 Audi A4 B6 1.8T M/T.
Does anyone know any local yards that have these harnesses or cars.

[Tommy5150]

Reviewed the timing and all markings lined up 100%.
Reviewed the Cam position sensor wiring and retrieved a 5.0V from the sensor harness connector and a 10.6V on the other Pin connection from the incoming power. I noticed the power was less than the battery which is 1 day old and has a voltage of 12.55. WTH is going on?
Does anyone know where I can get a harness for a 2002 Audi A4 B6 1.8T M/T.
Does anyone know any local yards that have these harnesses or cars.

Hey Sgudino,

Really interested in this post as I am getting the P0341 code and its driving me absolutley crazy as I can't work out why.... I changed both cam and crank sensors, checked wiring with multimeter and getting exactly what you are including Measuring banks 090's showing Camshaft adjustment status "Cam Ctr off" so something is blocking the cam sensor from providing a reading or turning on. Pulled rocker cover and checked 16 links between cams and all good so cam nor chain did not jump. So I'm thinking the only thing left to do is change my timing chain tentioner as I've read it can throw this P0341 code. I also check the plate under the Cam sensor as this plate can also get bent and damaged and warped and will throw this same code (P0341). Also read low engine oil could throw this code and sufficient oil and pressure must be there to properly grease the top section of engine. In my case I has enough oil as dipstick was showing just under half which should be sufficient.

The only code My VCDS shows is:

Address 01: Engine Labels: 06B-906-018-AVJ.lbl
Control Module Part Number: 8E0 909 518 M HW: 8E0 909 018
Component and/or Version: 1.8L R4/5VT 0002
Software Coding: 0011501
Work Shop Code: WSC 63351 000 00000
VCID: 3A2D32F5104C670B817-5160
1 Fault Found

16725 - Camshaft Position Sensor (G40)
P0341 - 004 - Implausible Signal - MIL ON

Readiness: 0000 1001

my post is here

So would love to know your outcome or what you find when you fix it. I feel your pain as I said it is driving me insane hahaha. Will be following your progress and also will let you know if I find a solution to my P0341 error.

Cheers

[Larhal]

Earler this year I had a similar problem, P0341. It ended up to be the connector to the CCT was bad. Bought a pigtail, replaced the connector, cleared the codes and have not had a problem since. Check the CCT connector/wires.
https://www.audizine.com/forum/showt...-harnes-repair

[sgudino]

So Larhal, so the P0341 code came ON and the VAGCOM fault mentioend 16725 - Camshaft Position Sensor (G40)
P0341 - 004 - Implausible Signal - MIL ON
did you inspect the voltage of the CCT? Or did you see a break in the wire? if you went by voltage do you recall the readings.
Are any other codes listed or just that one?

[sgudino]

You and I are having the same exact issue. I also swapped out my CCT so I am one step ahead of you. No change as P0341 is still on. I was going to swap out the ckp but as you have mentioned that dis nothing, I suspected that so that is why I did t do it. I am thinking about swapping out just the solenoid with the original solenoid at the CCT as I have read that sometimes that has been the issue. I took readings of the cmp with voltage and will post that later today so you can compare, we must keep our communication to help each other on this one. Good luck and keep me posted as to what you are doing.

[Tommy5150]

You and I are having the same exact issue. I also swapped out my CCT so I am one step ahead of you. No change as P0341 is still on. I was going to swap out the ckp but as you have mentioned that dis nothing, I suspected that so that is why I did t do it. I am thinking about swapping out just the solenoid with the original solenoid at the CCT as I have read that sometimes that has been the issue. I took readings of the cmp with voltage and will post that later today so you can compare, we must keep our communication to help each other on this one. Good luck and keep me posted as to what you are doing.

Hi Sgudino,

Yep I have the exact same problem as you down to a tee. As Larhal suggested I will be taking out the CCT and checking the wiring / connector going into it. So will see what I find, am hoping a broken cable right at the connector. But will keep you posted as to what I find, and same if you find anything let me know

[sgudino]

Tommys5150- The cmp had the following signal readings. I turned the key onto the on position.
1. Battery reading 12.3V
2. CMP 1&3 - 5.02V
3. CMP 2&3 - 10.80V
4. CMP 1&2 - 5.88V

[Tommy5150]

Tommys5150- The cmp had the following signal readings. I turned the key onto the on position.
1. Battery reading 12.3V
2. CMP 1&3 - 5.02V
3. CMP 2&3 - 10.80V
4. CMP 1&2 - 5.88V

Hi Sergio, Did the test today and got pretty much the same reading as you. Close enough. Battery at 12.8v.

(probes between pins on CMP connector)
Pin 1 & 3 - 5.0v
Pin 1 & 2 - 5.54v
Pin 2 & 3 - 10.54v

Also did CMP Connector - (measurements taken with multi-meter probe black to battery negative and red probe to pins)
Pin 1 - 5.01v
Pin 2 - 10.57v
Pin 3 - 0.00v (ground)

From what I read the pin 1 & 3 readings of 5.01v and 0.00v ground is normal. But apparently the pin 2 of 10.57v is too high. I'm trying to work out that if indeed this is the case and it's too high, then why? what could be causing this. I read that pin 1 and 2 both should be about 5v and pin 3 is ground so 0v is good.

I'm waiting to hear back from some peps hopefully confirming this and with more info on why and what could be causing this.

[sgudino]

That is great news Tommy. We are both exactly in the same place.
I am going to test the solenoid connector and the CCT tomorrow.
I tested my old CCT solenoid and had 14.1 ohms. I inspected the unit and the guides were worm good so no issue there. The spring and insert fell out real easy so nothing holding or rubbing together, since i have read that pressure do to the blocked insert filter, which the old unit did not have a blockage.
Tomorrow I will report more.

[Larhal]

So Larhal, so the P0341 code came ON and the VAGCOM fault mentioend 16725 - Camshaft Position Sensor (G40)
P0341 - 004 - Implausible Signal - MIL ON
did you inspect the voltage of the CCT? Or did you see a break in the wire? if you went by voltage do you recall the readings.
Are any other codes listed or just that one?

I basically stumbled upon the solution as I was checking the connection and wiggled it a bit cleared the code and the issue did not happen for a week. Then again the code came up. Figured that it was a faulty connector so I replaced it and resolved the problem.

[sgudino]

Larhal, so i repeated what you did. I wiggled the line inspected the connectors contacts and they were okay, nothing out of the ordinary.
I checked the ohms on both my old and new CCT solenoid both at 14 ohms. The line coming into the CCT from the connector was 7.2V

[Larhal]

Hi Sergio,

If you have nothing out of the ordinary I can only think of one possibility for the CCT. Is the solonoid on the CCT a 12 V or 7 V solonoid? It is not getting a signal to activate the solonoid or the oil passage to the solonoid, has a screen in it, is blocked. Otherwise it should work. The Cam positioning sensor rarely goes bad. I know as I had replaced mine when the problem happened with no success,

[Tommy5150]

Hi Sergio,

If you have nothing out of the ordinary I can only think of one possibility for the CCT. Is the solonoid on the CCT a 12 V or 7 V solonoid? It is not getting a signal to activate the solonoid or the oil passage to the solonoid, has a screen in it, is blocked. Otherwise it should work. The Cam positioning sensor rarely goes bad. I know as I had replaced mine when the problem happened with no success,

Hi Larhal,

This solenoid that your talking about is it inside the CCT? And also the oil passage with the screen? or where is this? Is it at the back of the engine or inside the CCT also? Just thinking what would be the easiest way to check the condition of the screen? Because if it is on the back of the engine there is not much space there for me to put my head and actually get a clear view of anything.

Or will the screen be visible when I pull the CCT off?

[sgudino]

Hi Sergio,

If you have nothing out of the ordinary I can only think of one possibility for the CCT. Is the solonoid on the CCT a 12 V or 7 V solonoid? It is not getting a signal to activate the solonoid or the oil passage to the solonoid, has a screen in it, is blocked. Otherwise it should work. The Cam positioning sensor rarely goes bad. I know as I had replaced mine when the problem happened with no success,

Larhal
I will have to check if the new CCT i installed is a 12 or 7V. The old unit CCT was connected to a 7V connector since that is what i was reading out from the voltmeter.
I will see how I can activate it using the VCDS to check it, hearing for the click. { New to VCDS how do I actuate the solenoid?) As for blockage, it is a new CCT unit and the old CCT unit was clean, so blockage doesnt appear to be the cause. But i am open to any recommendations.

[sgudino]

Hi Larhal,

This solenoid that your talking about is it inside the CCT? And also the oil passage with the screen? or where is this? Is it at the back of the engine or inside the CCT also? Just thinking what would be the easiest way to check the condition of the screen? Because if it is on the back of the engine there is not much space there for me to put my head and actually get a clear view of anything.

Or will the screen be visible when I pull the CCT off?

Tommy
The solenoid is on the CCT and is attached to the connector where you recorded the 6.9V, 2 prongs. The screen is on the underside of the CCT. To check the screen for blockage might require checking for oil pressure or removing the CCT, might be the only alternatives, but I don't know how to check the oil pressure.

[sgudino]

Hi Larhal,

This solenoid that your talking about is it inside the CCT? And also the oil passage with the screen? or where is this? Is it at the back of the engine or inside the CCT also? Just thinking what would be the easiest way to check the condition of the screen? Because if it is on the back of the engine there is not much space there for me to put my head and actually get a clear view of anything.

Or will the screen be visible when I pull the CCT off?

Tommy
The solenoid is on the CCT and is attached to the connector where you recorded the 6.9V, 2 prongs. The screen is on the underside of the CCT. To check the screen for blockage might require checking for oil pressure or removing the CCT, might be the only alternatives, but I don't know how to check the oil pressure.

[Larhal]

Tommy
The solenoid is on the CCT and is attached to the connector where you recorded the 6.9V, 2 prongs. The screen is on the underside of the CCT. To check the screen for blockage might require checking for oil pressure or removing the CCT, might be the only alternatives, but I don't know how to check the oil pressure.

I agree with this. You must remove the CCTto check the screen port in the head.

[sgudino]

Larhal
checked the old CCT its a 12V & 0.86A. I am currently cleaning out the connector and I have already cleared the codes so I am waiting until the system is fully operational (catalytic) to see if the CEL comes back on. In the meantime, i have already taken off the solenoid from my old CCT and will swap if CEL comes back. I don't want to have 2 variables going on at the same time because then I won't know where the issue might be located.

[Larhal]

Hi Sergio,

Have you confirmed the voltage sent to the CCT from the ECU is 12V?

[sgudino]

Hi Sergio,

Have you confirmed the voltage sent to the CCT from the ECU is 12V?

Larhal
The car has cycled through, after clearing out the P0431 code a few days ago, and the connector was roughly cleaned out yesterday. I am excited to say that the code is gone, I am going to get emissions checked right away today. To answer your question, I was getting the same results as Tommy5150 on all fronts, we were chasing the same gremlin on different continents.

Tommy if you read this before you start taking apart the engine to get to the CCT clean out the connector first. It's the 2 prong leading to the CCT.

[Larhal]

Sergio,
Glad to hear your found the fault.

[reesety]

I think I am having a similar issue. I just redid the connector for the cam position sensor, all of the pins are reading out the correct voltages. I tried replacing the cam position sensor today which is just before I read this and it did not change. I do not know what you guys are talking about for the CCT, could you explain how you check the voltages? and what you guys mean by the voltages?

[AvantNoir]

Check the wiring for shorts.

[reesety]

I have not been able to find any shorts without tearing the harness apart. I have been able to test the solenoid using vcds and it does activate, but when in key on position the pin on the sensor is only reading 4 volts, while my friends pin on the sensor reads 7 volts. Could this cause the code even though the solenoid is able to activate?

[maurizio]

do you still need the wiring diagram ?

[EuroxS4]

Have you check the oil level in the engine as well as oil pressure? CCT adjusts using oil pressure and is actuated by the ecm. If you have a timing belt done recently, then I would say your timing is of by one tooth for sure.