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M reg 1995 2.1td autobox Swap

Posted: Sun Nov 17, 2019 5:32 pm
by citroenxm
Im amoungst everything else thats been going on with house moves and purchasing, I also managed an autobox swap on a 1995 M reg 2.1 td auto.

The owner sold the car, but sentimetnal attachments lurd the car back in to owner ship however at 265k the box decided it was game over, initally starting with a slip in 1st it eventually and slowly lost forward drive, only going forward only. So, after a short while we manged to source another box, however it is strickly an unknown qty..

So the car..
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The useual, very tidy for 265k..
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Re: M reg 1995 2.1td autobox Swap

Posted: Sun Nov 17, 2019 6:02 pm
by White Exec
I've come to the conclusion that many of our auto boxes are "strickly an unknown qty.." :? :?

Re: M reg 1995 2.1td autobox Swap

Posted: Sun Nov 17, 2019 6:05 pm
by citroenxm
Theres pictures to come to the intro post, but my sony refuses to talk to the laptop, so im having to resort to sending 3 at a time in an email to myself so i can down load them to the laptop and insert them in after..

When this second box "Stops" we have decided the car will get a full conversion, to a 2.0 hdi 8v 110 with autobox that we know as we used it in a C5 for 12 months..

Re: M reg 1995 2.1td autobox Swap

Posted: Sun Nov 17, 2019 6:44 pm
by Dieselman
citroenxm wrote:
Sun Nov 17, 2019 6:05 pm
When this second box "Stops" we have decided the car will get a full conversion, to a 2.0 hdi 8v 110 with autobox that we know as we used it in a C5 for 12 months..
That would be an interesting conversion.
Does the Hdi ECU and gearbox ECU use CAN bus, if so, what would need to be transferred with it to make it run?
Would it need the body control module, ignition switch and ABS, or can it function with it's own CAN and the appropriate 120 ohm terminators.

Re: M reg 1995 2.1td autobox Swap

Posted: Sun Nov 17, 2019 6:56 pm
by citroenxm
Initially I was advised to check out the valve block, as it was easilly enough to look at, so we stripped the area down and got the cover off..

Removed the valve block and took it apart, only to find absolutley nothing wrong with it, no stuck valves, nothing broken.. so concluded it wasnt that and decided its front off and box swap..

So, the front end off and it all came off fairly easilly too, drive shafts out, exhaust down pipe off and wiring disconnected from the useual areas, lhm tank off, battery box out.. rads off, water drain..

PICTURES TO BE ADDED, THEY ARE ALL TOO LARGE TO LINK IN... SLIGHTLY ANNOYING..

Re: M reg 1995 2.1td autobox Swap

Posted: Sun Nov 17, 2019 7:02 pm
by citroenxm
Dieselman wrote:
Sun Nov 17, 2019 6:44 pm
citroenxm wrote:
Sun Nov 17, 2019 6:05 pm
When this second box "Stops" we have decided the car will get a full conversion, to a 2.0 hdi 8v 110 with autobox that we know as we used it in a C5 for 12 months..
That would be an interesting conversion.
Does the Hdi ECU and gearbox ECU use CAN bus, if so, what would need to be transferred with it to make it run?
Would it need the body control module, ignition switch and ABS, or can it function with it's own CAN and the appropriate 120 ohm terminators.

I needed to keep all the engine harness, of which theres little as its multiplexed, harness to the BSM in the car which incorporates the immobiliser, and some of the harness to the steering colum for the wiring for the transponder pickup ring. Theres no kick down cable on the AL4, but instead CAN buss comms cables between the gearbox ecu and engine ecu. Most of the harness is engine and engine bay located, with as stated a small amount to the BSM and of course power to the lift pump that would need installing in the fuel tank. Im fairly confident that the small amount of extra cableing would fit along side exsisting xm harnesses.. As long as I get the transponder circuitry all connected so it unlocks the engine ecu the rest should be fine

The transponder pickup is a simple clip on thing.. No ignition switch needs changing..

Re: M reg 1995 2.1td autobox Swap

Posted: Sun Nov 17, 2019 8:08 pm
by Dieselman
Have you kept all the modules that are on the multiplex?

Re: M reg 1995 2.1td autobox Swap

Posted: Sun Nov 17, 2019 8:12 pm
by citroenxm
Yup.. I stripped the car down bit by bit and kept starting it to check what I needed to keep..