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3rd July 2020, 17:00 | #101 | |
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Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007
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Simon
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3rd July 2020, 17:13 | #102 | |
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You could use C0749-1 instead. That's the supply to the master switch but C0749-1 will be live only when the engine is running which is effectively the experimental state you have at the moment. However this might not work either because you'd then have C0895-8 and C0239-1 connected together! Simon
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3rd July 2020, 17:46 | #103 |
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was the reading sufficient simon ? it all seams a little bewildering as to why it does not function.especially after changing of the interface as all the data requirements are there ... but are they in the right quantities ? or is something missing. have you ever known a kv6 180 sport auto without interlock ? there must have been a header in there at some point as dougie refers to a plug type fixing in there resembling a towing electrics plug affair. the header must have been removed unless a bespoke loom was made to order at assembly ... which i doubt very much. i cant see any towbar at the rear from the pictures and doubt if the interlock would have been removed for towing .. thats dangerous.! i wonder if the interlock circuit is incorporated with the cruise circuit at all. it may be possibly. what do you think simon ?
Last edited by xsport; 3rd July 2020 at 17:47.. Reason: i cant spell |
3rd July 2020, 19:02 | #104 | ||
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Incidentally, the mated headers in the engine bay resembling towing electrics plugs, are still only headers albeit different shapes to the normal oblong ones. The only connection of interest to the project has been the digital signal from the ECM to the cruise interface saying "ok, I'm configured for you" which was only partially fitted in the factory. I had to extend it from where it had been capped off to the cruise interface. Quote:
The signal from the engine ECM is a digital variable square-wave voltage between 0-12v. It's not a standard +12v supply. That signal is getting through (it's specified in post #79 above).
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R75 C2 RJBLH Connoisseur CDTi Auto Saloon Built 08/02/2005 @14:57 hrs: Registered 26/08/2005 122nd of 141 built that day British Racing Green Pearlescent (HFF) Sandstone leather with black piping (SPJ) 137,000 miles Last edited by goltho; 3rd July 2020 at 19:19.. |
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3rd July 2020, 19:12 | #105 | ||
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Dougie.
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R75 C2 RJBLH Connoisseur CDTi Auto Saloon Built 08/02/2005 @14:57 hrs: Registered 26/08/2005 122nd of 141 built that day British Racing Green Pearlescent (HFF) Sandstone leather with black piping (SPJ) 137,000 miles |
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3rd July 2020, 22:39 | #106 | |||
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Quote:
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Simon
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3rd July 2020, 22:58 | #107 | ||
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My reasoning though is based on incomplete knowledge of what's causing the problem, so I can't know if that's feasible. A diode on the other hand is a one-way street and would provide the solution from the existing master switch. I guess I know which way I'm going. I have used Schottky diodes successfully before on projects. Their power drop is lower than standard diodes and they have faster switching speeds. Dougie.
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R75 C2 RJBLH Connoisseur CDTi Auto Saloon Built 08/02/2005 @14:57 hrs: Registered 26/08/2005 122nd of 141 built that day British Racing Green Pearlescent (HFF) Sandstone leather with black piping (SPJ) 137,000 miles Last edited by goltho; 8th July 2020 at 09:39.. |
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7th July 2020, 11:11 | #108 |
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Simon,
One VIS motor is currently away at Stocktake's for repair so I've not been able to try out the diode yet. It's connected and awaiting the test though. Do you know the reason why the ECU doesn't like sharing the same switch with the interface? I'd like to understand it. I've reassembled the car's interior and apart from the radio still being out to let me finalise the switching, it looks tidy again. Dougie.
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7th July 2020, 11:31 | #109 | |
Doesn't do things by halves
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Simon
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9th July 2020, 21:54 | #110 |
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So I fitted the diode between the master switch feed C0749-5 and the cruise ECU C0239-1 to see if that eliminated the electronic brain f@rt which occurred when the set/accelerate button was pressed (horn tooted/IPK cruise light flashed as per post #97). It still didn't like it. The ECU is therefore powered by its very own fused 12v ignition-controlled supply as I could not be bothered to pursue the matter any further. Choose your hills on which to die, I say.
I did a 20-mile cruise test this afternoon after adjusting the throttle cable to take up slack which seemed to me to be causing a small pick-up delay when the vacuum pump kicked in (it was). It's perfect. It's been a challenge but glad I did it. Couldn't have done it with the forum though. Thanks for everyone's input. Dougie.
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R75 C2 RJBLH Connoisseur CDTi Auto Saloon Built 08/02/2005 @14:57 hrs: Registered 26/08/2005 122nd of 141 built that day British Racing Green Pearlescent (HFF) Sandstone leather with black piping (SPJ) 137,000 miles Last edited by goltho; 9th July 2020 at 21:57.. |
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