Since the release of v7, I've never been able to get ADC0F Map Switching working on my USDM IX.

I have a JoT HFS-1 activated switch installed that sends 4.7v to ADC0F and turns on an LED whenever I have my HFS-1 turned on. However, with Tephra options set to Alt Maps Master = 1 I was never able to get the car to switch to Alt Maps.

I logged 0x6B0D to get the ADC0F voltage and confirmed it was ~4.7v

I logged 0x8426 to watch which map was in use. It would stay at 167 (normal maps) even when ADC0F was at 4.7v.

I was able to workaround the problem by using TPS for Alt Map switching, but that was less than desirable. Using TPS, I was able to log 0x8426 as 167 = normal maps, 179 = launch maps, and 155 = alt maps.

So what did I do to fix it? I had to change the Alt Map Time to Activate from the default of 1500ms down to 10ms. As soon as I did that, map switching started working via ADC0F. I didn't try anything other than 10ms, but that seems to be the fix.

Just thought I'd share Now it's on to tune my car after 11 months of downtime.

 

hrmm bizaare...

i wonder if your the only one?

 

Is this in reference to a failsafe not working properly? And now you did? I was trying to look for the map switching harness for an ix ..

 

Have you tried to get your voltage oscilloscoped to see if your alternator is regulating well or if you have some interferences?
I won't get satisfied just fixing the problem with the "Alt map to activate" time value... Something else is happening...

 

Update: Looks like the 10ms alone didn't 100% fix the problem. I also had to lower the voltage threshold. Even with a steady 4.7v on ADC0F, the 3v threshold for some reason was too high.

I'm now running with alt map thresholds at 10ms and 1v and it seems to be working

 

I think you have a bad connection dude...

I wouldn't be surprised if your ECU is there changing maps constantly...

Can you ONLY log (to get max speed) the MUT for ADC0F?

 

Ok, I have experience a similar issue, wired in sensor, confirmed output of switch to ADC0f to be 4.7 v. The swtiching harness worked for a while with 8858, but soon it stopped workng. voltage is the same , nothing seems funny there. What should I trouble shoot to confirm that the ECU is getting the voltage to that pin? log "0F" in my EVO scan to see?

 

Had the same problem but with a chassis ground from the main harness that was throwing off voltage.

 

Main ecu harness ?

How can I log 0f