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Errorcodes . . . (more) (archive)

[ Follow Ups ] [ 7-series (E32) Message Board ] [ Msg. Board FAQ ]

Posted by gale on April 09, 2001 at 22:46:35:

In Reply to: Re: Errorcodes? posted by Odd-Jarle Kristoffersen on April 09, 2001 at 20:36:49:

There are a few things that cause the codes not to flash. I may be speaking out-of-school with yours being a 750 if it has the "fly-by-wire" electronic throttle, but here goes:

1. Check the microswitch behind the gas pedal, push it by hand a few times to hear if it clicks, sometimes it can get dirt in it and won't move

2. When you do the sequence, make sure the ignition switch is in the second on position, just before starting, but don't start it.

3. The gas pedal must be fully depressed to the floor and fully released each cycle and complete all 5 cycles in less than 5 seconds total.

4. There may be an issue at the trottle body, there's a microswitch there which must also click, make sure there's a little slack in the throttle
cable and the throttle closes all the way.

5. I read in another post a few months ago that sometimes the dealer will upgrade the software version of the Motronic unit when in for other service and this can cause the codes to no longer display.

6. Mine would not display the codes at all until one time I disconnected the battery to charge & after that, now the codes display properly with the pedal stomp routine. If you disconnect the battery, make sure you have the radio code handy. I think the battery has to be disconnected for at least 1 hour, I had mine off for overnight. If you are brave, you can short the negative cable (battery already disconnected) to the positive cable with at least a 1 Mega-Ohm resistor in series to "dead-stick" the system. This will clear any residual memory, I have not tried this, proceed at your own risk.

7. You may be able to find an inexpensive code display tool which plugs into the diagnostic socket and that should work if all else fails. You can also use it to reset the S.I. lights. Some more expensive units will also diagnose the SRS system and reset the SRS light if needed.

92 735i

Thanks Gale,
I tried the procedure but I didnīt get it to work though.

ī91 750iL

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