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a minor bit of progress this morning. I have been able to get the R75 ECU (NNN000110) to pull in the A/C clutch on a running engine by disconnecting the Freelander cluster and emulating a 75 cluster firing in the A/C switch signal. The next step is to get Andrew to modify the NNN000110 firmware...

TFL checker says that it isn't compliant

You have made me realise something, so thank you for posting. That is, now I have a Rover 75 auto engine ECU working in the Freelander, if I can't make the V6 auto transmission work I do have another option which is to put a Rover 75 gearbox and transmission ECU in it and just go FWD. It would...

I took the Jatco auto ECU from the same vehicle that I got the transmission from (a prefacelift V6 Freelander 1). My understanding is that the shift points are defined by the Jatco ECU and not the engine ECU. I am told that the R75 auto engine ECU is basically the same as the manual one but...

I don't think that I will need a TD4 cluster after all. I now have an NNN000110 ECU that picks up the EVAP sensor directly (just like the stock Freelander ECU, though on pin 10 instead of 47) therefore I don't need to get it from the cluster.

well.... except for hooking up a Jatco ECU of course

some more progress. I now have firmware for Rover 75 NNN000100 NNN000110 ECU that recognises the Freelander 1.8 Evap sensor, though it does involve repinning the wire from pin 47 to pin 10 (easy with a paperclip). Next steps are that I need to fake the Rover 75 trinary switch, hook up the...

ipads are not supported, because I don't have one to develop on. Developing on iphone/ipad needs a big investment in Apple stuff. Any old laptop pretty much will do, old Windows 7 or you can use Linux too. Something like a Dell D620 or D630 is plenty. Also there is a Raspberry Pi version...

apparently the shape of the teeth is different for VR and Hall Effect sensors, and if you use a Hall Effect sensor (which a 75 ECU needs) it won't like the shape of the teeth that PG1 flywheel has.

I think I know what the problem is with triggering the A/C. Freelander instrument cluster sends 0x80 in B0 of 0x615 to turn on the A/C whereas Rover 75 sends 0x40.

I appear in the last few minutes:-

The IRD seems over complex for driving the front wheels from the prop. Wouldn't it be easier and more reliable to put some other differential from another vehicle to drive the front wheels? If this LDU contains a differential of it's own then it wouldn't matter if the front and back diffs are...

I can not get my Rover 75 ECU to pick the A/C switch input even when connected to a Rover 75 heap of ECUs (including a climate control ECU). So today I drove to Maidstone to meet Matt from the "Furious Driving" channel because he has a 1.8 75 with working A/C and he let me tap into the CANbus...

I might do that.

bad news. The petrol cluster isn't the same as a TD4 one. I connected an EVAP temp sensor to C0230-20 and monitored CANbus and it doesn't send the EVAP temp data over CANbus. Then I swapped in a TD4 cluster and it does. 😢 So, I have asked Andy if he can modify the Rover 75 firmware (again) to...

I just confirmed 100% that 0x618: B2 is evap temperature and not oil temperature. I fitted a TD4 cluster to my 1.8 and connected pin 20 of C0230 to an evap sensor and I can see the number changing when I do that. Unfortunately 0x618:B2 is only active on a TD4 cluster. On a petrol cluster it...

The Rover 75 crank sensor is fitted to the transmission bell housing. The trigger wheel is either part of the Dual Mass Flywheel or welded to the outside of the torque converter. The trigger wheel tooth pattern seems the same.

I don't really understand how the Freelander 1 system works. However I can see that there are two fans and there seems to be a connector on each fan motor. The Rover 75 system is much easier to understand, there are two ECU pins, one for low speed and one for high speed. I'm tempted to re-wire...

that's a much better idea than mine. Looking at pictures they look kind of similar.

thanks so I need to make a circuit that feeds 5V to the sensor and when it sees over some threshold coming back it puts the trinary inputs on the R75 ECU in the "good" state and when under that in a "bad" state (probably open the hi/low switch).