I'm needing my instrument cluster to inherit the mileage of a BCU. NOT have the BCU inherit the mileage shown on the instrument cluster. Nanocom instructions are super vague and I only have one shot to get it right.

Context: @Extinct graciously let me borrow a ECU/BCU to troubleshoot a no-start issue and when I installed the loaner BCU, I'm 99% certain I told Nanocom to Sync BCU to Odometer, hoping it would preserve my IC milage (212K) but instead it brought over the BCU mileage (80K). My old BCU has the old mileage stored on it, and I'm afraid if I select the wrong one, I'll sync the 80K to the BCU and forever lose my original mileage on the odometer.

 

Interesting. I thought it always would register the highest odometer reading.

 

It will only sync to the higher mileage. If your cluster is 200k and your bcu is 100k it will change the bcu to 200k. If your bcu was 200k and the cluster was 100k it would make the cluster 200k. I've done many times and it will indeed keep the higher mileage. Or you can slap in a 100k cluster on a 200k bcu and simply just disable Odometer flash option and it will simply display the cluster 100k. My Nanocom has 1.36 firmware.

Disabling Odometer flash is usually the first option vs performing the sync.

 

Where is the option to disable the odometer flash? For some reason I can’t find it.

 

Me too. It displayed 80k, then I disconnected the battery, reconnected, and the odometer reverted back to the 200k mileage. Not sure what’s up with that momentary 80k display, but all seems to be resolved now at the proper mileage.

 

Under BCU setting/trans-lock-warn