Volvo Owners Club Forum - View Single Post - Electrics: 850: - How to make a Flash Code Reader, for Dummies

Chris_Rogers · Dec 28th, 2009, 15:30

I expect your 20 valve car has Motronic 4.4, which will need a scan tool, good news is that it's OBDII compliant so you can buy one quite cheaply.

Too make sure open the ECU box behind the RH headlamp and count the ECU's

For a manual car, if there is one ECU then it will be Motronic 4.4
If there are two then it will have Jetronic.

For an auto car add one ECU (for the transmission) to each of the above.

Dec 28th, 2009, 15:30	#10
Chris_Rogers VOC Member Last Online: Apr 10th, 2017 16:55 Join Date: Jan 1970 Location: South Kent Coast	I expect your 20 valve car has Motronic 4.4, which will need a scan tool, good news is that it's OBDII compliant so you can buy one quite cheaply. Too make sure open the ECU box behind the RH headlamp and count the ECU's For a manual car, if there is one ECU then it will be Motronic 4.4 If there are two then it will have Jetronic. For an auto car add one ECU (for the transmission) to each of the above.