MGF Diagnostic Socket wiring

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Danny
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MGF Diagnostic Socket wiring

Postby Danny » Wed Aug 14, 2019 12:13 am

This will be a long thread... I do apologise but I am useless with electrics so bear with me.

I need to wire in the OBD2 diagnostic port back into the buggy as I have a fault and this will be an easier way to find it (i hope)

I have the OBD2 port and luckily I left tails on it... which makes things easier...

20190813_234804.jpg


So the wire colours I have are... and I have pinpointed what they do as well

Bottom row from left to right...

Purple (P) = Ignition live through a 15 amp fuse
Yellow Pink (YK) = Air bag Control unit

Top row from left to right
Pink (K) = Goes to MEMS ECM (467) & ABS Control Unit 229
Black (B) = Earth
Red Blue (RU) = Goes to Alarm ECU (752)
Orange Blue (OU) = Goes to Alarm ECU (752)

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Danny
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Re: MGF Diagnostic Socket wiring

Postby Danny » Wed Aug 14, 2019 12:23 am

Below are all the wiring diagrams and I have highlighted the areas of interest

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Inkedsb3_LI.jpg

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Danny
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Re: MGF Diagnostic Socket wiring

Postby Danny » Wed Aug 14, 2019 12:28 am

So from my very limited wiring knowledge I need to do the following...

Purple (P) = Ignition live through a 15 amp fuse <=== Get 12v to this via an ignition live....
Yellow Pink (YK) = Air bag Control unit <=== no idea... do I even need this?

Pink (K) = Goes to MEMS ECM (467) & ABS Control Unit 229 <=== join this wire to the same colour coming out at the other end of the 467 however I dont have an ABS control unit...
Black (B) = Earth <=== oooh I can do this one easy enough
Red Blue (RU) = Goes to Alarm ECU (752) <=== find the same coloured wire on the 752 unit and join
Orange Blue (OU) = Goes to Alarm ECU (752) <=== find the same coloured wire on the 752 unit and join

Then plug in my OBD2 reader and switch ignition to pos 1 and hope..

Does this seem about right?

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Phaeton
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Re: MGF Diagnostic Socket wiring

Postby Phaeton » Wed Aug 14, 2019 11:11 pm


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Danny
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Re: MGF Diagnostic Socket wiring

Postby Danny » Thu Aug 15, 2019 12:08 am



Mine is a 2001 mgf.... so should be able to read with my obd2

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Danny
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Re: MGF Diagnostic Socket wiring

Postby Danny » Thu Aug 15, 2019 5:20 pm

I wired it all in apart from one wire which was the yellow and pink and I got a link error... no idea what to do next.

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ChaosMS
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Re: MGF Diagnostic Socket wiring

Postby ChaosMS » Thu Aug 15, 2019 10:40 pm

That pin out seems to be missing the rx/tx comms link line - or its going via one of the other lines somehow

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Danny
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Re: MGF Diagnostic Socket wiring

Postby Danny » Fri Aug 16, 2019 12:18 am

ChaosMS wrote:That pin out seems to be missing the rx/tx comms link line - or its going via one of the other lines somehow


It would appear that mine is early so cant be read with anything other tha n an MG reader... I have a friend with one so will see if that works and if my wiring is good enough

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Danny
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Re: MGF Diagnostic Socket wiring

Postby Danny » Mon Aug 19, 2019 12:51 am

Ok so a friend dropped the reader round and on friday I tried to get it to read and it was not having any of it.

However today I tried and actually followed on screen instructions and got the error codes....

So the good news is that I know my wiring works and also means I am 1 step closer to finding out what this fault it

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Danny
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Re: MGF Diagnostic Socket wiring

Postby Danny » Mon Aug 19, 2019 12:53 am

20190818_140414.jpg


I think the top error is an old error as in the early days the fans stopped and that was the sensor

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Re: MGF Diagnostic Socket wiring

Postby Danny » Mon Aug 19, 2019 9:35 am

It is a start but after reading lots of forums the ambient sensor will kick out an error if it is not plugged in

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Re: MGF Diagnostic Socket wiring

Postby Danny » Mon Aug 19, 2019 11:06 pm

also I was told that the older ECU wont log the error of a misfire as well... so possibly diagnostic reader is pointless


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