hi friends,a friend of mine has smart on his car, we go to live display on the xede and for our surprise an1 is not working its 0% any ideas why?
we checked the lines from the wideband to the xede and everything is fine!
any ideas?
what should we check for thanks?

 

An1 should be the wideband input. It should be around 2.5v at idle (once fully warmed up). Using a voltmeter, check the voltage comingout of the wideband and into the XEDE. See if it's where it should be or if it's giving 0v. The latter most likely being a sign of wideband install problems.

 

I made up an Excel spreadsheet correlating LC-1 Voltage out to Lambda to AFR to AN1 input percentage... let me know if I'm on the right track here.

The assumptions I've made are that AN1 0% = 0V and 100% = 5V, I also got data from Innovative stating that 0V=.5 lambda and 5V = 1.523 lambda. For simplicitys sake I set 5V = 1.5 lambda....

- Steve

 

Basically I needed to know if a high RPM boost drop I've encountered since installing my new turbo is

a: a boost leak

or

b: a improperly adjusted WGA

When the boost drops my "Live data display" AN1 input goes to 17%, which according to my math is 9.8 AFR. Super rich, which means boost leak. I'm going to do another pressure test on the system to verify, even though it seemed to check out ok when I installed the turbo....

 

A boost leak would also provide less fuel, being that less pressure would be provided to the FPR. Something else is going on.

 

Right, but wouldn't the net effect still be a rich condition? Metered air is being lost regardless of fuel pressure....

 

A boost leak shouldn't make a 2 point fuel change. BTW, I am confused by this thread, are you the friend steve?

 

No, I hijacked the thread, sorry...

I'll do a boost test tomorrow, if I find a leak I'll fix it and check the AFRs again.

 

shiv thanks we checked the voltage everything seems fine but still we are not getting it to work at what % does the an1 need to climb up in order for us to know that it works ???
one more thing when disconecting the wideband from the xede the % goes up to 49% and stays static ones connected it goes down to 0%,1% why ?
thanks

 

I'm having the same issue. Spent a LOOOOONG night last night working with my buddy and Dustin on the phone. I'm about to go out and check my wideband voltage as well. Everything on the system is running except SMART timing.

Shiv, you had mentioned something wrong with the wideband install -- what potential areas have you seen (most common) to check for?

 

AN01 is at ~45-48 at idle and corresponds to 14.5-15:1 AFR and ~ 2.5v. if AFR is lean an01 value increases, if AFR is rich an01 value decreases.

When AN01 shows 0% = means xede is seeing 0 voltage which to me means that there is a short somewhere or the lc-1 wires are not conected correctly to the xede.

 

Ahh Ok -- i'll be sure to check those wires out. The odd part was , this WAS working at one point last night. Thanks Jorge!

 

ok we will check the voltage again thanks