I have an 87 golf gti 8v with motometer gauges the car is uk spec and is currently residing in montreal, canada. it's still (legally) on UK plates which seems to cause some interest with the local plod. I am after doing some road rallies here which are all average speed / distance events, measured in kms. I remember reading an MFA article in VWM in about '97 that gave all the hidden codes for various VAG vehicles. having read this, I managed to reset a customer's k-reg passat tdi miles MFA to read in kms for a trip to the continent, by changing the MFA country code. That was a long time ago though and I have forgotten how i did it. Is it possible to do this with my GTI? also, what are the hidden MFA functions for the early g2 8v gti? I have searched the forum, but it would appear that the answer to my questions are at: www.myscirocco.com http://www.nwlink.com/~vdb/vw/Electrical/mfa.test which both seem to be down.
Hold the button in, turn your ignition on, off and on again position 1: Default: Engine code 1: Land code 2: Speedometer 3: Upper rev limitter 4: Lower rev limitter 5: Decelaration fuel pressure 6: Display test MFA switch on position 2: Default: Test programm of programmed bytes (checksum) 1: Intake Vacuum 2: Digital rev counter 3: Fuel usage (like normal) 4: Signal from speedo sensor 5: Oil temperature (like default) 6: Ambient temperature (like default)
Just to add to rubjonny's response - the Fuel usage in the 2nd mode is actually the instantaneous consumption rather than the average consumption. Also, I've not been able to get the second mode to work on Motometer gauges in my '87 GTI - only the first. My '91 and '92 GTIs both display both modes (on VDO gauges.)
oh and the 'speedometer' isn't an actual speed display, I think it just shows pulses from the speedo unit thing, so not much use!
ta for that, guys. any idea how to change the Land Code with out replacing bits. I assume that it can't be done, but you never know.....
Sounds interesting, I'll have a play with mine when I actually get my car back! Was just wondering, how do you get it back to the normal settings after getting into these settings? Also, I don't have an instruction booklet for my '88 GTi 16v, so I've had to guess how the MFA works: Setting 1 and 2 are the same but with indipendant resets, i.e. the 0 on either side of them 0 1 2 0, so you could use one for a days data and one for a tank of fuel's data etc.? "Hidden" setting 2 sounds pretty useful, I like the idea of a digital rev counter etc . Also, what's a typical oil temp. that it should be reading, mine says something like 92-94 degrees after ive been driving for a while, is this ok/correct? Thanks, hope you enjoy playing with the settings...I use my car for road rallies too, but ovwer here in the UK not in Canada!
Not sure on the first part, but 92-94 sounds very good! - mine around 98-100 normal running and goes up to around 108 if stuck in traffic, fan one kicks in at around 98 and fan 2 at around 102 iirc! Think the book spec says they can go up to 140 before you have to start worring
The normal MFA usage is explained in the car's manual, if you have it... For anyone who doesn't, the two modes are as follows: Mode 1 - Used as a trip computer. It records the details of the latest journey, and resets itself if the ignition is switched off for longer than two hours. Mode 2 - Used as a long term computer. Only automatically resets when one of the incremental values reaches the maximum for that parameter. e.g. Miles reach 9999, driving time goes over 99 hours 59 minutes. As mentioned, they can both be reset by sliding the stalk switch to the relevant side and holding for a moment, if required. To exit from the diagnostic functions mentioned above, the ignition needs to be switched off. This will put the computer back to working in normal mode. Hope this helps.
Thanks. Not sure how accurate my temperature readings are, the air temp one def. does up if stuck in traffic but that's normal with a lot of cars I've had. My fan comes on step 1 all time time as soon as you start up the ignition as it appears to have been wired into the heated rear window circuit then bypassed the switch (i.e. remove the heated window circuit fuse and the fan doesn't come on!), which might explain why it usually runs quite cool!
