31-03-2021, 12:35 PM
I don't know enough about the HDi' to help much further I'm afraid. I'm a petrol rather than a derv man.
If your friend has access to something like Autodata then he'll be able to get specific (& useful) wiring diagrams for your model. Critical to further diagnosis I would say. Also, Autodata gives info on how to test components like solenoids. (Usually a resistance test across two or more pins).
Even though you could read codes I'd take them just as a general guide. Direct testing of components & wiring is needed to confirm their accuracy.
With wiring to a solenoid you can often use a 12v bulb &/or test lamp to check that the ECU has control of the circuit & that it can carry the required load. There are lots of guides for such testing on the web.
If your friend has access to something like Autodata then he'll be able to get specific (& useful) wiring diagrams for your model. Critical to further diagnosis I would say. Also, Autodata gives info on how to test components like solenoids. (Usually a resistance test across two or more pins).
Even though you could read codes I'd take them just as a general guide. Direct testing of components & wiring is needed to confirm their accuracy.
With wiring to a solenoid you can often use a 12v bulb &/or test lamp to check that the ECU has control of the circuit & that it can carry the required load. There are lots of guides for such testing on the web.