Hi all, I have a frustrating issue with our Ducato based motorhome (Autotrail V line). automatic- on occasion van won't start from the key, symptoms as below:
All dash lights come up as usual, when turning the key to crank the engine over nothing happens. After a few seconds I see an error message 'check transmission'
I can confirm with ignition on I can go through gear change selections and I hear the movement happening under the bonnet
To date I have changed the earth leads inside the cab from battery to body and in the engine compartment from body to engine / gearbox
Battery is n ew an d has a good state of charge
I have invested in ECUmultiscan diagnostics and it shows two errors:
Engine ECU PO520-67 - oil pressure switch - Signal incorrect after event
Further info says oil pressure sensor / switch circuit, fault is intermittent
Gearbox ECU P1755-12 Start up relay - Shortcircuit to +V
Further information says Startup Relay control circuit is faulty, check the relay, harness and connectors, ignition circuit and Engine ECU
I have changed the oil pressure switch as that was relatively easy to do, made no difference.
I can start the van by turning ignition on, select neutral and run a wire from the starter solenoid to +12v connection under the bonnet, starts every time.
On the occasions it does start from the key there are no error messages when I rescan with ECUmultiscan.
I am now at the point of sending the ECU off to one of these companies who can test and hopefully repair but before I do that is there a relay between the ignition switch and the starter solenoid? a search on google brings up conflicting information, if there is I'd like to tray that first.
Any help or suggestions on what else to tray would be very much appreciated, intermittent faults are the worst!!
All dash lights come up as usual, when turning the key to crank the engine over nothing happens. After a few seconds I see an error message 'check transmission'
I can confirm with ignition on I can go through gear change selections and I hear the movement happening under the bonnet
To date I have changed the earth leads inside the cab from battery to body and in the engine compartment from body to engine / gearbox
Battery is n ew an d has a good state of charge
I have invested in ECUmultiscan diagnostics and it shows two errors:
Engine ECU PO520-67 - oil pressure switch - Signal incorrect after event
Further info says oil pressure sensor / switch circuit, fault is intermittent
Gearbox ECU P1755-12 Start up relay - Shortcircuit to +V
Further information says Startup Relay control circuit is faulty, check the relay, harness and connectors, ignition circuit and Engine ECU
I have changed the oil pressure switch as that was relatively easy to do, made no difference.
I can start the van by turning ignition on, select neutral and run a wire from the starter solenoid to +12v connection under the bonnet, starts every time.
On the occasions it does start from the key there are no error messages when I rescan with ECUmultiscan.
I am now at the point of sending the ECU off to one of these companies who can test and hopefully repair but before I do that is there a relay between the ignition switch and the starter solenoid? a search on google brings up conflicting information, if there is I'd like to tray that first.
Any help or suggestions on what else to tray would be very much appreciated, intermittent faults are the worst!!
