Rover 75 / MG ZT/T Rover 75/MGZT Service Interval Reset *At your own risk* - MG-Rover.org Forums
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post #1 of 266 (permalink) Old 03-05-2005, 12:06 Thread Starter
jvs
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Thumbs up Rover 75/MGZT Service Interval Reset *At your own risk*

Have read Rover 75 threads on this subject and note that shorting pins 4 and 8 on the diagnostic socket is said to reset the indicator. Checking the wiring diagrams, pin 4 is earth, pin 8 goes to the instrument pack (skt c0233 pin 5) and ABS ECU (skt c0501 pin 11). Although this method was suggested in the threads, nobody appears to have reported success (one or two said it did nothing!). Can anyone supply confirmation before I take this - possibly risky - step?
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post #2 of 266 (permalink) Old 03-05-2005, 12:29
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The success rate seems to be about 50/50. Might be dependant on year/model ?

If at all in doubt, don't risk it !

Your local garage may have service reset tools, they'll probably only charge you a fiver for the reset
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post #3 of 266 (permalink) Old 03-05-2005, 13:23
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I've got the reset tool!
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post #4 of 266 (permalink) Old 05-05-2005, 23:16
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Smile

It worked for me!
I tried it for the first time this last weekend.
My 75 is a jan 2004 '53 reg, just pre face-lift.
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post #5 of 266 (permalink) Old 15-05-2005, 20:15
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75 service reset update

Quote:
Originally Posted by jvs
Have read Rover 75 threads on this subject and note that shorting pins 4 and 8 on the diagnostic socket is said to reset the indicator. Checking the wiring diagrams, pin 4 is earth, pin 8 goes to the instrument pack (skt c0233 pin 5) and ABS ECU (skt c0501 pin 11). Although this method was suggested in the threads, nobody appears to have reported success (one or two said it did nothing!). Can anyone supply confirmation before I take this - possibly risky - step?

An update on this and related threads - Have just had the 75 serviced at Nationwide Autocentres ( nice job btw) but they couldn't reset the service interval countdown . So , I decided to have a go at terminals 8 and 4 with a carefully crafted piece of bent wire - It worked first time ! For the record , this was on a 51 reg 2L v6 conn ; the countdown interval only appears briefly so i inserted one end of the high tech bent wire into pin 8 and as soon as the service figure appeared I just flashed the other end onto pin4 - no more than a second . The countdown reset to 15000 , and everything else has been working ok since yesterday , so I'll be doing this again . Please note ,like someone else said , this worked for me on my model but i dont know if they are all the same so we all do this at our own risk !
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post #6 of 266 (permalink) Old 15-05-2005, 20:17
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Where is the connector located - I've got a ZT 2004
post #7 of 266 (permalink) Old 15-05-2005, 20:20
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Look under and to the right of the steering wheel, might have a little dust cover over it.
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post #8 of 266 (permalink) Old 15-05-2005, 20:20
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Quote:
Originally Posted by e668ecp
Where is the connector located - I've got a ZT 2004
lower edge of facia , above pedals , to the right of the steering wheel .Best seen from outside with the door open , on your knees !
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post #9 of 266 (permalink) Old 21-05-2005, 17:13 Thread Starter
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Smile It worked!

Took the plunge and earthed pin 8 while service indicator was showing. Seemed to need a couple of seconds contact. Anyway, back to 15000 now! That's on a 75 Tourer diesel Jan 02.
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post #10 of 266 (permalink) Old 21-05-2005, 19:27
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Excellent

Would be handy if we could build a list of models this works on.
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post #11 of 266 (permalink) Old 21-05-2005, 19:34
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I don't see why it shouldn't work on ALL 75/MGZT models, to be honest.
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post #12 of 266 (permalink) Old 21-05-2005, 20:27
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My 75 is having it's 60,000/4 Year Service on Monday so I shall be trying this reset trick too.

Am I correct in thinking that I simply insert a wire into hole 8 and hole 4 at the same time ?

Also my Service Indicator is currently showing -2800, has it gone too far to be reset ?
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post #13 of 266 (permalink) Old 21-05-2005, 20:31
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Nope, it'll still reset OK..
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post #14 of 266 (permalink) Old 21-05-2005, 20:35
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Quote:
Originally Posted by *DLN*
Am I correct in thinking that I simply insert a wire into hole 8 and hole 4 at the same time ?
Yes, and afaik you need to do so in the few seconds when the miles to service figure appears just after switch on.

hth

Mike
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post #15 of 266 (permalink) Old 22-05-2005, 14:27
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IT WORKED !

The trick is to insert a piece of wire into hole 4 before turning the igintion to position 2 and then quickly insert the other end of the wire into hole 8 as soon as you have turned the ignition to position 2.

I'm now back at 'OIL SERVICE 15,000' and the car is only being serviced tomorrow
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post #16 of 266 (permalink) Old 22-05-2005, 15:31
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Model and year please Dave
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post #17 of 266 (permalink) Old 22-05-2005, 15:35
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post #18 of 266 (permalink) Old 22-05-2005, 15:37
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I've just checked my copy of the RAVE CD and MGR advise the use of this method if T4 (workshop workstation) is unavailable.

Remember hole 4 before hole 8 !
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post #19 of 266 (permalink) Old 22-05-2005, 19:40
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Quote:
Originally Posted by *DLN*
I've just checked my copy of the RAVE CD and MGR advise the use of this method if T4 (workshop workstation) is unavailable.

Remember hole 4 before hole 8 !
It also works fine with hole 8 before hole 4 ! see my post #5 above
Chris
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post #20 of 266 (permalink) Old 22-05-2005, 19:47
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Apologies for being a dimwit here, but which are holes 4 and 8? (no one say the ones next to 3 and 9 please!!)



Had a look yesterday and couldn't see obvious numbering.



Cheers,



CAM
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