Still waiting for the CCM to arrive but I was digging in the wiring and noticed two pairs of CAN wires heading out to the ABS module. The harness crosses over from the driver strut tower along the firewall to the ABS module. This specific harness doesn't splice into the ECM. I am confused because every diagram I have seen says the ABS module has a single pair at pin 24 and 40. Where do these 'other' CAN wires go?

I attached a picture of the wires at the driver strut tower, you can see a pair that turns into the firewall to go into the dash area to the CCM and back out and up to the ICM. This mystery pair comes from the connector harness near the driver strut tower and goes to the ABS module as well. But I checked the ABS module connector and I don't see anything other than the CAN at pin 24 and 40.

 

Have you downloaded the x type electrical guide to help you with the tracing? Attached and also PATS diagnostic guide.

 

Thanks Dell, I had the guides already. Pin 24 and 40 on the ABS module are the only CAN wires that are shown in the diagram. In the physical harness there are two pairs that go through the ABS Module harness. Maybe they are spliced into each other at some point. The other ends are at the harness connector at the driver side strut tower and another going into the firewall to the CCM as shown in the pictures. Just wanted to learn more about this CAN wiring situation since I have down time until the part arrives.

 

Found the splice as I thought, Since this vehicle is a Manual Transmission, they probably just spliced them at the ABS module rather than running it to the non-existing TCM. Makes sense I guess.


Two yellow and two green CAN wires turn into 1 pair just at the harness near the washer fluid reservoir.

 

Well, the CCM came in and I replaced it and the P1638 is still around. Having the ECM and ICM rechecked by other shops.

 

UPDATE: The cluster is the issue, the first and second repairs failed. The chip on the ICM was retaining the memory and all the information needed for the vehicle so the tech was able to capture it.
The bad part is my original part number that the dealer has for my vehicle's cluster is 1X4F-10849-BK which they say doesn't have message center (small square display). My vehicle does however have a 1X4F-10849-EJ in it,
which DOES have message center (longer thin display?). I am confused. Have any of you ran into this issue before?


The one with the thinner ribbon cable is the message center cluster.

 

https://www.ebay.com/itm/274851182064

 

Thank you Dell, always on point. What I was confused about is the fact that the dealer is telling me the cluster in my vehicle is incorrect when it clearly worked for many years. I didn't know if they were misinformed. Also, maybe non message center vehicles can possibly have the message center so long as the cluster part numbers begin with the same series of characters, ignoring the last two letters. 1X4F-10849-?? for example.

 

The last 2 letters are revision numbers. The closer to or greater above your current installed part will work. Lower usually not.

Part number is

C2S42249

Without message center.

C2S45231

with message center

There's also a couple of different displays, one is a skinny rectangle the other a larger square

Rectangle (with plug on left when viewed from rear)





Square (with plug on right when viewed from rear)

 

Well things got weird. Was told by a tech that they cannot clone my cluster because the data is corrupt. The Vin, mileage, and immo stuff show up. But the car will not start. So I'm waiting for a solution now.

 

I had a mechanic connect an Autel tablet to the vehicle and all the modules came up except for the ICM. We put another ICM just to see if there was a change and the security light blinks rapidly with the unprogrammed cluster as expected but the Autel still doesn't recognize that ICM either. We put the original back and the security light turns off after 3 seconds. This shows that the PATS is valid on the cluster. I am starting to doubt that the data on the ICM is corrupt because the information is there and PATS functions correctly. I don't understand why the Autel wont pick up the ICM, the CAN bus wiring is 100%. If you plug in an unprogrammed ICM wouldn't the Autel recognize it but show that it is not valid for the vehicle? It just stays blank like if the ICM is missing with both ICMs.

 

Both my clusters were bad. I put a 3rd one in and a U2510 code comes up. It means the data stored in the ICM doesn't match the data stored in the ECM. What this tells me is that the 3rd cluster at least has communication with the ECM and is ready to be programmed. My first two clusters never had communication with the ECM and would not show up on the Autel Diagnostic tool. Once programmed, I will confirm the fix and put this thread to rest with a conclusion.

 

Long story short. V130 SDD Virtual Image and a mongoose Pro solved my issue and I ran the IMMO setup. Car fires up, I am super excited and happy I didn't junk my baby.