2005 Volvo V70R manual conversion

Kutorak · Post by **Kutorak** » 08 Nov 2019, 06:40

Hello guys. Please help. I’m planning to do manual conversion to my 2005 V70R.
I have parts from 2004 R manual that I’m planning to transfer.
My question is: since Volvo changed some things from 04 to 05, does engine wiring will be same? I will send manual ECM and they will match it to my CEM.
If I will install engine wiring from 04, will it match the rest of my wiring?
Thanks you.

Post by **jimmy57** » 08 Nov 2019, 08:48

04 ECM will be 250 kBps bus speed and the 05 ECM will be 500 kBps bus speed. I don't think they can overcome that. Are they not going to "tune" the ECM in your car now? I can't recall that 04 and 05 have any differences in wiring but auto and manual have differences in transmission wiring harness. There is effectively a single wire from a reverse light switch on a manual and gear position on an auto is a 4 wire input where the grounding combinations of the 4 pins has a unique pattern for each lever position. The other item to overcome is clutch pedal position sensor needed on manual trans cars. That is not part of the engine wiring but I think the wires may be in the harness under dash on all. I have not done one of these myself.

Post by **abscate** » 08 Nov 2019, 09:06

04 ECM will be 250 kBps bus speed and the 05 ECM will be 500 kBps bus speed.

Yikes. That sounds like quite the interface problem to overcome.

I can't just add another battery to double the BUS speed?

Kutorak · Post by **Kutorak** » 08 Nov 2019, 09:33

Thank you guys for replying, useful information. I still want to try to do it. Since mine 2005, should I buy 05-07 manual ecm instead of 2004 that I have? I’m sending to “Precision ECU” to match manual ECM to my CEM. As I mentioned before, I have engine wiring from manual Volvo. I have pedals, shifter and all the mechanical parts. My concern about clutch sensor and reverse switch, since they aren’t attached to engine harness. ..?

Post by **abscate** » 08 Nov 2019, 14:49

I can't see cloning two ECMs with different bus speeds ending very happily, but as Fremulon says,

Not a Volvo doctor.

Kutorak · Post by **Kutorak** » 09 Nov 2019, 11:04

So, if I’ll get ECM from 05-07R, more chances, that will pair with my 05 CEM?