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16th April 2024, 07:12 | #11 |
Gets stuck in
Rover 75 Connoisseur 2.5 V6 auto Join Date: Jan 2008
Location: Chatteris, Cambridgeshire
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I've had KV6's since 2007, and always done my own maintenance.
I agree that the brake pedal switch is the most likely cause, everyone seems to mention that. However, on occasions I have suffered a different symptom. On the bulkhead, offside of the engine, you will find the vacuum pump. The hose from the throttle body diaphragm should terminate on this; I have had it loose or dropped off on 2-3 occasions. |
16th April 2024, 12:52 | #12 | |
This is my second home
Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009
Location: Hampshire
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Quote:
Well I thought it would take longer to trace and check the cables out than it would to just replace the coupler, so seeing as I had a spare one from a scrapper I tried it and that cured the fault. Splitting the coupler and inspecting the ribbon cable I found a split that had started to run across it, so if your radio buttons aren't working as well it may well be that the ribbon cable has started to go south. |
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16th April 2024, 12:55 | #13 | |
This is my second home
Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009
Location: Hampshire
Posts: 11,567
Thanks: 3,470
Thanked 3,119 Times in 2,247 Posts
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16th April 2024, 13:02 | #14 | |
Gets stuck in
Rover 75 Tourer Join Date: Mar 2022
Location: Chesterfield
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16th April 2024, 17:04 | #15 |
This is my second home
Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009
Location: Hampshire
Posts: 11,567
Thanks: 3,470
Thanked 3,119 Times in 2,247 Posts
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Yep that sounds like a good plan. 👍
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16th April 2024, 17:15 | #16 |
Gets stuck in
Rover 75 Tourer Join Date: Mar 2022
Location: Chesterfield
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I've just been out experimenting.
I disconnected the plug from the rotary coupler and hot wired a switch across the light green/red and the black wires. It still doesn't work, so the fault is obviously elsewhere. I didn't realise when I was checking at Gaydon, but there are actually two fuses for cruise control. I've checked the other one and that is also good. A couple of things are confusing me. The wiring schematic shows a cruise control ECU for the petrol model and a cruise control relay for diesels. Mine is a diesel. I can find no mention of this relay - R142 - or its location. The schematic also shows a feed from fuse 4 in the engine bay fuse box to the CC relay. Last but not least, the schematic for the rotary coupler would appear to have an error. I would expect the common side of the two cruise switches to be connected to ground, along with the horn buttons, but the schematic shows them connected to the wrong side of the horn buttons. So, does anyone know where the CC relay is located? That might be my next step, along with checking fuse 4 in the engine bay fuse box. |
16th April 2024, 21:09 | #17 | ||
Doesn't do things by halves
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007
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Simon
__________________
"Whatever is rightly done, however humble, is noble." Sir Henry Royce. |
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