PDC/CAN Gateway Error that i cannot fix

[dan2485]

I have a fault that shows up on my VCDS scan in the Can Gateway and the PDC park assist in the initial gateway scans.

I get this in the Can Gateway.

1 Fault Found:
01327 - Control Module for Parking Aid (J446)
004 - No Signal/Communication - Intermittent

And this in the '76-Park Assist -- Status: Sporadic communication error 1000' gateway list but the park assist module is showing no faults.

The PDC works fine as well as my rear view camera (OEM).

To try and clear this fault i have done the following.

1. Changed the PDC unit.
2. Replaced the sensor's. ALL OEM sensors. (a specialist said that the sensors can do this error so i replaced them one at time with no joy).
3. Replaced the PDC Loom.
4. Replaced the Can Bus wiring to the Can disconnector.
5. Moved the position of the wires in the disconnector.
6. Checked the power in wiring all ok, the module would report the faults if it was a power issue.

The Only thing thats left is the Gateway but why is it only on the PDC? which tends to say the gateway is ok.

This is bugging me to reslove this, has anyone had a problem like this also?

I can ignore it as the system is working as it should.

[Novica]

Did you try to switch off the power to Can gateway? To take out the fuse which is for can gateway or for power supply modul which gives the power to can gateway?

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[dan2485]

I have had the battery disconnected a few times.

When I did my 3G High MMI Upgrade the battery was off for 4 hours.

The fault does clear but then comes back after a while.

I do think it’s related to a loose connection hence replacing the can bus wires.

I have redone the pins in the plugs twice, both times they continuity checked out ok.

[Gunnark100]

So full story is, this started after you did 3G retro and replaced gate also or?

[dan2485]

So full story is, this started after you did 3G retro and replaced gate also or?

No, this fault has been on the system since i retrofitted my OEM PDC and i have lived with it since 04/2015.

The MMI retrofit was done a few weeks ago.

The fault was the same when the car had the 3G basic MMI on it.

The gateway unit has never been changed.

I do not think the gateway unit is faulty as no other module is reporting this issue.

The coding for the gate way might be the problem. The coding has been checked in the installation list and i do not get the incorrect coding fault.

This is when the pdc was not on the car.

Address 19: CAN Gateway (J533) Labels: 4F0-907-468.clb Part No SW: 4F0 907 468 M HW: 4F0 907 468 F
Component: GW-BEM 4CAN-M H06 0031
Revision: LB000027 Serial number: 2700L096188069
Coding: 000B03
Shop #: WSC 02391 823 56573
VCID: 3979CCF6B07413D693D-806C


Subsystem 1 - Part No SW: 8K0 915 181 C HW: 8K0 915 181 C
Component: J367-BDM H07 0107


No fault code found.

And this is now.

Address 19: CAN Gateway (J533) Labels:. 4F0-907-468.clb
Part No SW: 4F0 907 468 M HW: 4F0 907 468 F
Component: GW-BEM 4CAN-M H06 0031
Revision: LB000027 Serial number: 2700L096188069
Coding: 000B03
Shop #: WSC 02391 823 56573
VCID: 3979CCF6B074138E8D-806C


Subsystem 1 - Part No SW: 8K0 915 181 C HW: 8K0 915 181 C
Component: J367-BDM H07 0107
Serial number: 00000000004140599495


1 Fault Found:
01327 - Control Module for Parking Aid (J446)
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 2
Fault Frequency: 7
Reset counter: 221
Mileage: 249858 km
Time Indication: 0
Date: 2017.08.19
Time: 14:56:29


Freeze Frame:
Bin. Bits: 10000
Voltage: 11.70 V
Count: 12
Bin. Bits: 10010
Time: 25.40 s

Note the Coding has not changed it reads '000B03' on both logs.

The PDC module coding is correct at 0220106 and the hidden menu option CarMenuOperation/parking option is set to 5.

Is there another option in the hidden Menu to be set?

[dan2485]

Could it be due to the 0220106 coding as i selected the 'S-variant ECE countries (without reinforced bumper)' as i have a S line rear bumper maybe?

[Novica]

Maybe PDC control unit is not compatible with facelift models? Did you try to return back your original PDC and see if the error will repeat?

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[dan2485]

Maybe PDC control unit is not compatible with facelift models? Did you try to return back your original PDC and see if the error will repeat?

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The PDC module is the correct one for the 3G cars rear sensors only variant.

The fault happens with either module so not a module hardware fault.

[Gunnark100]

Dan, status sporadic you get because error under gate, in 76 there is no need to have error to have this silly status.

But why you have no comms is a puzzle....so scan shows 76 not reached, if so, how you coded this if it is not reached? Earlier you asked about green menu coding, you had set carmenuops to 5...it does not matter is it 1 or 5...i have rear only and have this 1, it is setting so to say when menu is available , but there is 2 other places you need to tick also...but i guess it is ticked anyway as it is working ok...btw retro to high or plus as there is slight difference with green menu busassingment vs protocollswitch...but also cant believe this might be issue, but never know....Regarding gate coding this should be ok...all you do there is ticking modules in installation list and get the coding based on that. I have few c6 gate codes and always b03 or 303...so this also cant be culprit of this.

But just for fun change 76 module coding regarding rear bumper...also not shore how this can trigger non comm error...

[dan2485]

I think that i know what the problem is that is causing this, as i can make the code appear after the fault is cleared.

I think that the power lines are reversed.

I will need to check the loom end to end this weekend.

When i clear the fault and leave the key in the fault remains clear.

Take the key out and the fault is then generated this tends to suggest that the Permeant live is on the wrong wire and the module is going dead.

I may have wired it wrong if this is the case.

I will feed back over the weekend.

Thanks for the support so far.

[Gunnark100]

I think that i know what the problem is that is causing this, as i can make the code appear after the fault is cleared.

I think that the power lines are reversed.


Good guess, pin 1 and 3 other way around, sounds promising!

[dan2485]

The power wiring was reversed, i swapped them over and cleared the fault and it stays clear.

I caused the fault on the install, and over processed the fault trying to fix it, lesson learnt.