Bleeping reversing sensors! Advice on a suitable w/shop manual

[TedTF85]

2009 TF 85th Anniversary Edition, new to me.

Reversing sensors: The reversing senors start to bleep as soon as reverse gear is selected. They continue, sounding like a reversing truck, without changing frequency and do not "sense" obstacles, until reverse is deselected. Any info and/or advice appreciated.

Workshop Manual: I see there are .pdf manuals and/or printouts available on-line which claim to cover up to to year 2011 cars, but the date on the cover is 2002! Has anyone any experience of these volumes for the later cars? I would especially like a manual covering the suspension changes on the 85th and electrical diagrams covering the later cars.

Any experience of the MGF and TF Restoration Manual by Roger Parker, which seems to cover a variety of subjects including the later cars?

Thanks in anticipation
Terry

[Roverlike]

Reversing sensors were mostly done as dealer fit, and the usualy would not be mentioned in any wiring diagram as they were not mounted as factory fit.

What you have is 4 sensors within rear bumper, connected to separate electronic box most probably placed in the boot of the car, covered by carpet in the boot, and wires connected to your reversing light in the boot. Speaker for bleeping would be near around. This system is separated from the rest except connection to reversing light and power from the car.

As far as I know there are no specific manuals or diagrams which cover specificaly later models. What people use are manuals for 2004 and 2005 MG TF as they are the most close. There are some differencies in wiring but the rest should be fine regarding bodywork or suspension or similar. I do not know is there anything specific on 85th cars.

[ArntyR]

Hi Terry.

W/shop manual 9/2008:-

https://clubmgftf.com/wp-content/upload ... Manual.pdf

Yes I've got that Roger Parker manual + it does mention SAIC TFs. I would recommend it. Mine came from eBay.

After 3years I'm still finding stuff out about SAIC TF differences with MGR TFs There doesn't seem to be a lot of discussion about them for some reason...

[TedTF85]

Thanks again for your responses, very much appreciated.

Reversing sensors: my car has only three sensors, centred and R&L. The sound seems to come from the interior of the car. Further delving seems in order, with multimeter in hand?

Manual: wow, thanks for this, much bedtime reading methinks! Just had a peep and it details the fitting of the three "PDC" sensors, wiring loom, module & speaker (not sure where this is, but it shows removing & refitting rear view mirror for access?!

Interestingly, my MGA originated in West Sussex - 1700 PX reg.

[nigelandjo]

There's a module for the parking sensors in the boot to the right hand side of the drivers side lights behind the carpet. They will beep when they are wet even if nothing behind the car. Has the car been pressure washed? Perhaps water has got in to the sensors...


Caution: The tyre pressures in the manual are incorrect for the 85th. They should be 30 psi Front, 36psi Rear.

[ArntyR]

Sorry to hijack but nigelandjo, would those tyre pressures be a Twist of Pepper 7J/8J initiative?

I ask because I've never been convinced they'd be the same as (say) 11-spokers.

Mine seem happy at 28/34...somewhere I saw a recommendation of 26/36 for those too...dunno

[nigelandjo]

Yes unique tyre pressures for the TF85th due to the suspension changes. Standard TF on 11 spokes is 26/36

[ArntyR]

Erm...mine's a '10 TF which is a standard, non-LE500 or 85th SAIC TF with ToP wheels from new but no susp mods... confused

[markvrs]

Hi,

Going back to the reverse sensors, they were OEM fit on LE500 and 85th, three sensors and have an x-part numbers. Kit can be retrofitted to other SAIC TF's

Part Number MG TF LE500 - XPT000400 Rear Sensor Fitting Kit

400000333 Transducer (3)
400000334 Control Unit (1)

Cheers, Mark

[Roverlike]

Well I am pleased that I learned something new from this thread.

[nigelandjo]

Erm...mine's a '10 TF which is a standard, non-LE500 or 85th SAIC TF with ToP wheels from new but no susp mods... confused

What pressures does it say in the handbook? I think it will be 26/36.

[ArntyR]

Yep you're right, 26/36 in my book - but we already know the owner handbooks are a hotch-potch. (I gather some early SAIC TFs were even sent out with MGR TF handbooks...)

As Roverlike says we can all learn anew, esp if we keep the spread of info happening.

[TedTF85]

Workshop manual - anyone any experience of the download from this online company - https://www.downloadworkshopmanuals.com ... l-download ? The page claims to cover TF years 2001 to 2011 including wiring diagrams, which I am after. I know it's cheap, but as the company has not repied to email enquiries I thought I would check them out first. I did receive, with many thanks, a pdf repair manual from a forum member, but it does not have wiring diagrams and dieter's ones are not up to date for later cars. I have a problem with the boot light not coming on and have checked all the likely chafing points as described on the forum, but on my car (85th) the light is wired into the boot release switch and alarm in some way that I cannot figure out from the older diagrams. I did strip the lock with the solenoid and the problem seems to be with the purple wire from the lock (not the key switch) not becoming live when the lock is open, but cannot fathom out where it comes or goes! To complicate matters the two wires from the light disappear in the loom to the left of the lock wiring (which is the one that is implicated in boot hinge action problems. The wires to these systems are ludicrously light in diameter and stiff, so vulnerable to damage), so the connection must be made via the wiring from the solenoid and lock via another route?

[talkingcars]

Back to the sensors (sorry, pun intended) -

switch the ignition on but don't start the engine,
select reverse,
go to the back of the car and put your ear to the sensors,
there should be a buzz from each of them.
Is it the same from all of them?
Is there no noise from one?
Does the beep go continuous if you cover one?

If you can get to the wiring unplug each one in turn to see what happens.

The control box is probably behind the left hand side boot carpet.

For manuals I have used the factory manual, MGZR for the engine and gearbox, Rover metro for a clue to body systems, how to guides on www.the-t-bar.com

[TedTF85]

Reversing sensors: thanks for that. I'll try later, but have disconnected the plug from the control box to the sensors in the meantime. Have looked up removal of the sensors, the R & L are reachable without dismantling, but the centre one needs the removal of the bumper panel