How to Fix 2018 Camry Transmission bad after Mileage job

**MileageAudit5** · 21st April, 2020, 12:15 PM

I have done over 10 of these 2018 Toyota Camry's with no issues using Smelecom Multiplex Adapter or SF Tool. One time with Smelecom about 10 minutes after job was done customer called complaining his transmission was not working correctly. I thought no way could the Mileage job cause trans. issues. After hours of trying to fix this rewriting old info back etc. with no luck I left it overnight. Next day roughly 12 hours later went to start car and problem was gone, transmission was working okay. So weird and rare but in case it happens to any of you guys, don't panic just park it overnight then it should work fine. I guess it was the mileage correction that caused the problem.

**morrisgauge** · 21st April, 2020, 05:09 PM

Out of curiosity, had you disconnected the battery before pulling cluster, or reset any ECU/TCM memory with a scan tool after?

**MileageAudit5** · 22nd April, 2020, 10:09 AM

Yes, removing the battery and waiting a couple minutes before putting back on was tried many times. Made the car work each time for about 2 minutes. Then same transmission issue. Everything else worked fine. New miles were counting gauges set and working. Would love to know if anyone else more technical could try and make the connection between clean mile job and transmission like not going past 5 mph???

**lexidime** · 22nd April, 2020, 04:10 PM

Originally Posted by MileageAudit5

I have done over 10 of these 2018 Toyota Camry's with no issues using Smelecom Multiplex Adapter or SF Tool. One time with Smelecom about 10 minutes after job was done customer called complaining his transmission was not working correctly. I thought no way could the Mileage job cause trans. issues. After hours of trying to fix this rewriting old info back etc. with no luck I left it overnight. Next day roughly 12 hours later went to start car and problem was gone, transmission was working okay. So weird and rare but in case it happens to any of you guys, don't panic just park it overnight then it should work fine. I guess it was the mileage correction that caused the problem.

There's a manufactures Software update to correct that vehicle from stalling during rapid deceleration when the perceived outside temperate is over 100 degrees and the baric pressure is in a specific range band
that update relies on a few parameter readings and the instrument cluster MCU: mileage is one of them. Your customer is going to have major issues in the future as the temperature rises. Because
instead of Toyota changing the faulty components in the transmission they decide to slow down the wear and tear through software. The higher the mileage the softer the shift and dis and engagement of the lockup torque converter<----Vice Versa!
That vehicle's Ecu needs to be some how re-flashed to the new km to function somewhat normal, depending on the mileage deviation

**MileageAudit5** · 23rd April, 2020, 11:15 AM

Lexidime, thank you for your explanation. So strange but that makes sense. I will have to keep a tab on the vehicle. If customer calls in future about same problem I will update it to this post.

**lexidime** · 25th April, 2020, 01:47 AM

If your customer is still under warranty they should be able to get that flash for free as long as the dash vin match the vehicle

**MileageAudit5** · 4th May, 2020, 07:58 PM

I did not try using a scan tool to clear the memory or read possible stored fault codes. Just remove the battery. I should have scanned it and cleared it first.