Rolls Roys RR1 DME2 repair help need

[jonazizbey]

Hi colleagues

who had such a case?

Rolls Roys RR1 parked for 2 months and then when customer starts a car finds that 6 cylinders stop working, which controled by DME2 , and Scanner can not connect on ECU DME2, DME1 fault show that no communication with DME2
ECU's of car has no faults related to DME2,

all fuses, wires on the bus channel, everything is checked ok,

most likely you will need advice on repairing the ECU, I connected ECU on table accrodung to this diagram
https://www.newtis.info/tisv2/a/en/rr1-p...09/YteNH3B

But power supply amper can be seen that not flowing when connected, Normally ECU should consume a little ampere even if evenrthing is shot off,

What do you advise? is there any pin that to wake up ECU?

Please help, any help would be appreciated

[Willisodhiambo]

Clone DME1 into DME 2 and reprogram and see. KEEP BACKUP SO YOU CAN REVERT

Oe connect dme 1 at DME2 position and see if you can read it.

That way you know if it is dme fault.

[Meat-Head]

Looking at your location, must be thousands dumped in the streets
go unbolt one

[AvechuchoAxel]

WHITOUT STARTING THE ENGINE, swap ecu's left to right and try to read with scanner. That will tell you if the problem is in the ecu or wiring issues. A rat chewing wires is a common problem when cars are parked for long periods of time...