EVC Fault

[CHI]

I have twin VP D4 260,s . Yesterday i had an EVC error show on my EVC display.

It read as follows. EVC Control Panel
Signal loss
stbd HCU.
There was also an orange flashing warning triangle showing on the warning display dial for the Stbd engine. I had trouble starting the stbd engine due to low battery power and had to use the link switch once the port engine was running. I dont think this is connected to the EVC fault as i have completely isolated the batteries overnight , left battery charger on and was able to start the stbd engine this morning okay. however, the fault is still there.
I also can hear a faint ticking sound, from under the dash when the stbd ign switch is on . No ticking at all from the port side, All gauges working ,gear selection fine, but no lights for the stbd EVC control panel.

Any ideas?

 

[jfm]

HCU is helm control unit. Signal loss suggests it is dead or there is a bad connection. I suggest start by checking green electrical connections to/from it (lots of deutsch plugs and sockets). It is usually a box with a silver casing, somewhere under the dash

If still no good you might need a new HCU

 

[aquatom]

Attempting to start with low batterys can cause EVC errors. I've not had it on a D4 but seen it a few times on other Volvos. The fault can stay in the memory until cleared with the Vodia or sometimes an auto reconfigure can clear it.

Other than that try as suggested above. The HCUs and all other control units can be swapped port to stbd to test but will give you a chassis id conflict fault so you will need the Vodia to check that!

Good luck!

 

[volvopaul]

Follow the procedure in your handbook to place the engine to read the codes/diagnose stored faults, you can then erase the stored fault which should clear the orange triangle showing up.

 

[Andyroonot]

What type of EVC control panel have you got? Depending on that, fault codes may not be available to view by the user and will require the Vodia to diagnose. Whats the serial number of the engine(s) - from that its possible to determine the EVC generation and then give you a step by step guide of what to do to read the code, if available.

Swapping side to side would tell you if it was a dead or faulty unit but I'd check all the connections first.