Caddy Max 2.0 140 No Communication with ECU
Posted: Tue Oct 08, 2019 12:14 pm
Can anybody out there help me? 2011 Caddy started off 6 months ago when the exclamation mark came on and the cruise control was not working, when the vehicle stopped it would clear itself and would happen now and again, then I had an issue of the ABS light coming on ESP light coming on and I took it to my local garage and had it cleared.
A week or so later all the lights came back on including the yellow steering light again I had this cleared and the van was working fine again for a couple of weeks. I then went to start the van one day and it came up with the Button for Driver Assistant System Defective and Error Brake, it has been plugged in cleared again and it was all working fine then after another week all the lights came back on with all the errors and with the red steering light on the VAG will not communicate with the ECU it was never a problem when the steering light was yellow, we did get info off the VAG saying Failure to ABS module and lost communication with clusters so I went for replacing the ABS module first this then put all the lights out and the vehicle drove for about an hour before they all came on again.
So I sent the clusters off to be tested and it came back ok, as I started looking elsewhere ie wiring loom, fuses, relays, battery voltage I did lose the clusters, they went totally blank, I sent them off again and this time they came back saying they were non repairable so I bought new clusters & put them on, all dash lights are working but the fault lights are still there along with the annoying red steering light. I have had 4 different diagnostic checks now and we could not code the new clusters as we can not get into the ECU, so to bite the bullet I took it into VW but even they could not get into it! They suggested 4 hours labour on the wiring loom, which had already been done as I explained to them. So with the van now being off the road for 4 months I have replaced the ABS, replace the clusters, ECU has been tested and they say has no faults, I have replaced can gateway under the right hand side of the dash and now I don't know where to go!! Any help/suggestions would be much appreciated
**UPDATE**
Hi all, just an update, I have not been on here for a long time over the ongoing problems with my Caddy.... I have taken it to another garage in november who had it up on the ramp and it was tested for the steering rack modrum, all plugs and wiring underneath and still no joy. It was there for about 6 weeks and again nobody has a clue what it could be! It is now at another garage who was prepared to find the fault and if he didnt find the fault said he wouldnt expect paying, safe to say my money is still in my pocket and I am no nearer a solution. As a last resort this week I bought an ECU kit which included the ECU, the clusters the key with barrel, the gateway and the Body Control Modrum (the one that holds the relays under the dash) all these parts were off exactly the same vehicle only 6 months newer but they were off the 2.0TDI 140bhp we came to plug it in and still no communication with the ECU and the diagnostics. Basically there is no comms on the vehicle even with the ECU kit I bought. Any help at all would be appreciated as this van in going to send me into an early grave!!!
A week or so later all the lights came back on including the yellow steering light again I had this cleared and the van was working fine again for a couple of weeks. I then went to start the van one day and it came up with the Button for Driver Assistant System Defective and Error Brake, it has been plugged in cleared again and it was all working fine then after another week all the lights came back on with all the errors and with the red steering light on the VAG will not communicate with the ECU it was never a problem when the steering light was yellow, we did get info off the VAG saying Failure to ABS module and lost communication with clusters so I went for replacing the ABS module first this then put all the lights out and the vehicle drove for about an hour before they all came on again.
So I sent the clusters off to be tested and it came back ok, as I started looking elsewhere ie wiring loom, fuses, relays, battery voltage I did lose the clusters, they went totally blank, I sent them off again and this time they came back saying they were non repairable so I bought new clusters & put them on, all dash lights are working but the fault lights are still there along with the annoying red steering light. I have had 4 different diagnostic checks now and we could not code the new clusters as we can not get into the ECU, so to bite the bullet I took it into VW but even they could not get into it! They suggested 4 hours labour on the wiring loom, which had already been done as I explained to them. So with the van now being off the road for 4 months I have replaced the ABS, replace the clusters, ECU has been tested and they say has no faults, I have replaced can gateway under the right hand side of the dash and now I don't know where to go!! Any help/suggestions would be much appreciated
**UPDATE**
Hi all, just an update, I have not been on here for a long time over the ongoing problems with my Caddy.... I have taken it to another garage in november who had it up on the ramp and it was tested for the steering rack modrum, all plugs and wiring underneath and still no joy. It was there for about 6 weeks and again nobody has a clue what it could be! It is now at another garage who was prepared to find the fault and if he didnt find the fault said he wouldnt expect paying, safe to say my money is still in my pocket and I am no nearer a solution. As a last resort this week I bought an ECU kit which included the ECU, the clusters the key with barrel, the gateway and the Body Control Modrum (the one that holds the relays under the dash) all these parts were off exactly the same vehicle only 6 months newer but they were off the 2.0TDI 140bhp we came to plug it in and still no communication with the ECU and the diagnostics. Basically there is no comms on the vehicle even with the ECU kit I bought. Any help at all would be appreciated as this van in going to send me into an early grave!!!