evening all

Code reader is showing “P0697 sensor supply voltage no.3”

I have attached a pic of the code (turbo sensor fault now sorted)

Cheers.

I might expect P0045 and P0697 to occur at the same time. If you try clearing the code what happens?

How did you sort the turbo sensor fault?

The code P0697 is a sensor fail rather than anything to do with a glowplug. I would have thought all the glowplugs would be powered through a single relay, without detection that one might have failed. BICBW.

 

Thanks for reply.

I’ve never had a Po045 fault code appear.

When I clear codes, it’s just reappears immediately.

I sorted the turbo sensor fault
By fitting a new turbo boost sensor and repairing a wire to it which appeared dodgy.

When I unplugged the gp relay, it through up loads of codes and when replaced it and cleared codes just through up same P0697 again.

 

Thanks for reply.

I’ve never had a Po045 fault code appear.

Your photo says P0045 Turbo Charging...........?

 

Oh yea sorry.. the P0045 was there, my bad.

The wire wouldn’t have been able to touch anything else, it was a little break right at the connector.

The only code I have now is the 697.

I have just re googled it and you are right relates to an open circuit.

I have no idea where I read that it relates to a certain glow plug but i definately did.

Any ideas where to go from here?

Don’t know if I said, glow plug and service light both on constantly.

 

Oh yea sorry.. the P0045 was there, my bad.

Any ideas where to go from here?

Don’t know if I said, glow plug and service light both on constantly.

Using OBD reader I would check the values from as many sensors you have access to.

I suspect if you drive it, assuming it is driveable, the offending sensor fail should materialise. Some take an extended time to fail.

 

Update...

Measures the resistance of glow plug com ground to gp tip and all four showing 0,6ohm so all good there as they are new.

I then measures ground to gp wiring cap which showed 10,8V each which rose to 11,0dd when ignition turned on!?

Could it be gp relay?

 

Update...

Measures the resistance of glow plug com ground to gp tip and all four showing 0,6ohm so all good there as they are new.

I then measures ground to gp wiring cap which showed 10,8V each which rose to 11,0dd when ignition turned on!?

Could it be gp relay?

What are you measuring? Do you have 10.8V from glowplug to ground with the ignition off? This could not be the case, well, after an hour or so the battery would be flat!

 

Don’t get confused here.
At 10.8 volts my battery was dead when my alternator failed.
Current draw is measured in amps.

 

My field is embedded systems, software and hardware. I have a degree in electrical engineering.

In the fault condition you describe, I would expect a fully charged battery to be flat in less than one hour. More's the point I would expect to read 0V across your battery and wondering why it reads 10.8/11V

Lets confirm for the final time, with the ignition switch off, and key out, and left for a number of hours; you still have a battery voltage of 11V and measure 10.8V across the glow plugs.

I feel there is something missing.

BTW, your alternator would not cope with the current draw from all the glow plugs.

 

As a general rule , with engine not running you should expect to see around 12.5 volts & with engine running over 13 volts .

 

Just done it again

Engine off, key out, from chassis ground, to glow plug cap is as pic.!

 

change the relay and see how it goes. theyre only a few quid on ebay. in the meantime unplug it.
you dont need them to start the engine or drive it in this weather.
doesnt take an embedded systems software and hardware electrical engineering genius to work that out

 

Think that’s my next plan..

I don’t intend driving it anyway. Bought it as a project to do up and sell but needs dash lights off for MOt

 

In reference to the diagnostic trouble code did it state wether the voltage was high or low ?

 

No wasn’t that specific.

 

So checking all the relays I found this....
Burn marks withing the connector!!

Anyone know what circuit this operates?

 

It says 60amp on the relay , could be for the heated windscreen .
What number does it say it is in the handbook ?

 

Don’t have the manual.. and everywhere I have looked doesn’t say!!

It is the only 60amp... don’t have a heated screen!

 

Ok leave it unplugged & see what doesn’t work.

 

Not starting at all now

 

So it must be something to do with the fuel injection management system then , when plugged back in does the van start ok ?

 

Changed the relay and connector... van starts but warning lights and code still coming up..

Guess I’ll have to run it for a while and see if it throws another code alongside the p0679.

Failing that will have to go in to garage to find which circuit it is

 

FIXED!!!

Took the van in and it transpires that the after market mass air flow sensor I put on was throwing all the values out and causing the issue.

Put on a Bosch mass air flow sensor and boom all sorted and working... no more dash lights or faults!

Beware cheaper after market parts lesson learnt.