Technical Automatic Step and Reversing Camera faults

[Bert41]

We have a Swift Suntor 590RS (Fiat Ducato) 2006 the reversing camera has stopped working and at the same time the automatic step does not retract when engine started, works on the switch.

Reversing lights do work but not the camera when put in reverse you can't even switch it on by the switch on the monitor.
This has happened a couple of years ago but it started working again before I looked into it.

If anyone has an ideas on where to start looking for the problem I would be very grateful.

 

[lancepar]

When my switch plays up I spray electrical contact cleaner anywhere I can reach with the spray can tube extension. Not failed to work yet.
Can't help with the other problem.

 

[Communicator]

We have a Swift Suntor 590RS (Fiat Ducato) 2006 the reversing camera has stopped working and at the same time the automatic step does not retract when engine started, works on the switch.

Reversing lights do work but not the camera when put in reverse you can't even switch it on by the switch on the monitor.
This has happened a couple of years ago but it started working again before I looked into it.

If anyone has an ideas on where to start looking for the problem I would be very grateful.

Check condition of connections to fuses and additional relays under bonnet. These may have been installed under the hood at rear of engine bay.

The following is an impromptu step by step procedure, which should lead you to the problem, but I may not have covered all possibilities.

1. Is split charge relay operating, and habitation battery being charged when engine is running?
(Confirm that habitation battery terminal voltage rises when engine started.)
2.If no change then check D+ connection to relays under bonnet. Corrosion at relay terminals is possible. Do not forget common earth to relay coils, and do take note that split charge relay has live 12V connections at both terminals 30 and 87. (Remove 2 off 20A fuses to isolate.)
3. If split charge OK. Check that fridge is receiving 12V element supply, when engine is running.
4. If fridge not receiving supply, check 15A fridge fuse under bonnet.
5. If 15A fuse OK then you may have to trace red/yellow (fridge supply) wire which is connected to step retract relay and "Observation Unit" which is connected between camera and screen.

 

[Bert41]

Check condition of connections to fuses and additional relays under bonnet. These may have been installed under the hood at rear of engine bay.

The following is an impromptu step by step procedure, which should lead you to the problem, but I may not have covered all possibilities.

1. Is split charge relay operating, and habitation battery being charged when engine is running?
(Confirm that habitation battery terminal voltage rises when engine started.)
2.If no change then check D+ connection to relays under bonnet. Corrosion at relay terminals is possible. Do not forget common earth to relay coils, and do take note that split charge relay has live 12V connections at both terminals 30 and 87. (Remove 2 off 20A fuses to isolate.)
3. If split charge OK. Check that fridge is receiving 12V element supply, when engine is running.
4. If fridge not receiving supply, check 15A fridge fuse under bonnet.
5. If 15A fuse OK then you may have to trace red/yellow (fridge supply) wire which is connected to step retract relay and "Observation Unit" which is connected between camera and screen.

Thanks do you have a diagram, as I have no idea about checking D+connections. The service book doesn't help.

 

[Communicator]

You have not stated whether your base vehicle is a 244, or a 250 model. Check first three numbers of VIN to determine which. Wiring details will differ considerably between models, which includes the interface to the converters wiring installation. (2006 was the model change year.)

Attached is an extract, from a Sargent diagram, applicable to a 2006 Swift conversion, so probably applicable to your vehicle.
I suspect that the fridge 12V element supply may have failed on your vehicle. This is the red/yellow wire on the diagram. Its source is the fridge relay towards the top centre of the diagram extract, where the fridge relay connects to the vehicle battery +ve. The fridge element 12V supply is used to replicate the D+ signal to operate the step relay, and the "observe unit" which appears to control rear view camera.

I suggested in post #3 that you confirmed the operation of the split charge relay. Correct operation of the split charge relay would confirm presence of the D+ signal. It is a simple check which only requires confirmation that the habitation battery voltage rises when the engine is started.