Reversing sensors

[JohnDotCom]

Within same Models in UK different Fuse-boxes were fitted or Fuse designations.
Very hard to give concrete answers at times.
I now know of at least 10 different fuse Layouts.

[Moonstone]

The manual I checked was the PDF version from 1999.
There is a legend on the fusebox cover, but you need to be a contortionist with younger eyes then mine to read it. (A digital camera is handy in these situations - F12 says "AUX".) The Parking Aid shared it's fuse with other options - the sun-blind and accessory socket, plus, according to Haynes, rain sensor and interior mirror.

It is possible to reach some of the wiring loom without removing the bumper. The colour coding is as follows:
Brown wire common
Black wire common
NS Outer Red
NS Inner Yellow
OS Inner Green
OS Outer Blue
The other wires all have battery-level voltage with respect to Brown.

[anglaslt]

Originally Posted by Moonstone

There is a legend on the fusebox cover, but you need to be a contortionist with younger eyes then mine to read it. (A digital camera is handy in these situations.) The Parking Aid shared it's fuse with other options - the sun-blind and accessory socket.

Thanks. I'm presuming the fuse is OK with three sensors clicking. I think I now need to take off the rear bumper to check the wiring connections. Can't get hands anywhere near.
That'll be fun
Tom

[Moonstone]

If you reach inside the bumper, the wiring will pull forward. You should at least be able to reach the connector. Bumper removal involves undoing of pairs of screws under rear wheel arches and inside tailgate hatch - these are awkward to locate when re-fitting. The 2 underbody plastic scrivets and 5 hatch screws on top are a bit easier.

[The Yellow Peril]

Same problem with my 05 Diesel 75.

Select Reverse and a continuous tone until gear shift returned to Neutral. After the car has run for a while it works fine, it also seems to be better in the wet, loose wire/connector methinks. Another job for a dry day/weekend

Andrew

[SKS Disco]

A common problem with these is a dodgy connector to the main wiring harness. So dodgy in fact MG Rover issued a technical bulletin about it.
I will see if I can dig it out.

[SKS Disco]

I'm back.
It is Tech Tip TT0104 but I can not attach files.
Unless a mod would like to upgrade my status so I can, I will have to find another way to do it. I will think about it....

[anglaslt]

Originally Posted by Transam

I'm back.
It is Tech Tip TT0104 ....

Would be useful. Thanks for all the help guys.
Tom

[SKS Disco]

Technical Tip

The following should be used as an aid or suggestion to resolve the described condition. In most instances this suggestion may eventually be replaced by a formal Technical Bulletin. Please do not file this document after use since in the majority of instances the information provided will have a limited life and may be updated daily.
Your feedback concerning the effectiveness of this information would be helpful.
No:
Date:
Section:
TT0104 Issue 1
02.03.2004
ELECTRICAL
Model / Derivative:
Rover 75 (including Tourer)
MG ZT (including MG ZT-T)
Title / Symptoms:
PARKING AID INOPERATIVE / INTERMITTENT OPERATION
Cause:
Poor electrical connection at Park Distance Control PDC sensors.
Suggested solution:
1. Referring to workshop manual repair number 76.22.44, partially remove rear bumper to enable the PDC multiplug to be disconnected.
2. Disconnect and re-connect the multiplug (arrowed in illustrations) several times ensuring that the latching device is securely engaged.
3. Refit the bumper and confirm that sensors are now operating correctly.

[anglaslt]

All fixed. It was a broken yellow wire into the multi plug. Not obvious until I touched it and it fell apart.
Excellent guidance on here and I didn't need to touch the bumper.
Thanks, Tom