When I run my car off of my P28 in "P28" mode, it runs fine. But when I flip the switch to "Uberdata" mode, I get a CEL.

When I try the service connection jumper trick, the CEL comes on solid instead of flashing. Instead, while the solid CEL is present, the SRS light flashes me a code 21? What's with that?

Anyone know what makes the SRS flash? Do I actually have an engine code, or is the CEL just indicating the SRS problem?

 

The SCS connector shorts all the control units in the car to ground, so they all flash any trouble codes they have. So you have a code 21 in your SRS system, and possibly a bad chip, with the solid check engine light.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by drdisco69 &raquo;</TD></TR><TR><TD CLASS="quote">... and possibly a bad chip, with the solid check engine light.</TD></TR></TABLE>The CEL is SUPPOSED to go on solid when you jumper the SCS connector. Code zero (bad ECU) is when you have a CEL while driving, but the CEL doesn't light up with the jumper.

 

So what does the code mean?

I removed the passenger airbag a while ago which resulted in a constant SRS light while driving. I just installed a new motor and now instead of a constant SRS light, I get the constant CEL.

 

Oh geez, do a search for "SRS flashes". Seems like no one has ever figured this out.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EnzoSpeed &raquo;</TD></TR><TR><TD CLASS="quote">Oh geez, do a search for "SRS flashes". Seems like no one has ever figured this out. </TD></TR></TABLE>
Waaa, you dont even tell us what year and model it is. Does the srs light stay on when driving?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JimBlake &raquo;</TD></TR><TR><TD CLASS="quote">Code zero (bad ECU) is when you have a CEL while driving, but the CEL doesn't light up with the jumper.</TD></TR></TABLE>

Thanks for clearing that up then. You'll have to excuse me, none of the ecus I've done have ever gone bad, so I don't have much experience with that.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chiovnidca &raquo;</TD></TR><TR><TD CLASS="quote">
Waaa, you dont even tell us what year and model it is. Does the srs light stay on when driving?</TD></TR></TABLE>

The SRS has alwyas stayed on because I ripped out the passenger airbag.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by drdisco69 &raquo;</TD></TR><TR><TD CLASS="quote">... none of the ecus I've done have ever gone bad, so I don't have much experience with that. </TD></TR></TABLE>Me neither. First time I saw someone on a forum claiming that was a bad ECU, I thought about how that CEL stays on when I jumper the SCS to set spark timing. So I looked it up in my Helm book.

 

For the record, it WAS two separate problems.

Solution:
-Uncheck VTP in uberdata - got rid of solid CEL
-Wire 2ohm resistor across passenger airbag socket
-Reset SRS code manually - got rid of SRS light