Thread: Starting problem

load chexck the starter and the bcu frame earth and connector earth

Originally Posted by Blknight.aus

load chexck the starter and the bcu frame earth and connector earth

Starter is ok cause when it eventually starts it’s same as always and fires up instantly...
Plus it’s not getting power to the solenoid wire...
I’ve checked the earth behind the BCU all good there...
Plugged and unplugged C0662 from the BCU and that appears to be ok as well? I’ll run the ohm meter on the earth wire to the body, just to be 100%
Would have thought if an earth problem I’d be having more faults occur?

Don’t happen to know the exact location of the earth in the diagram I posted before??
Or if the BCU has only one earth?

Cheers Lemo

Found earth at connector C0660-11 for the BCU from header earth C0551-4 (K108) under carpet drivers foot well.

Just tested C0660-11 at BCU plug to earth point behind and good continuity, which rules out bad earth?

Lemo

Now have the B/ (B with a cross through flashing)

I’ve had this a few time before over the last 6 months but never really presented a problem...

So is this a shagged BCU or fuse box and the IDM???

And if I get a new BCU what was the process with syncing speedo? Dose the BCU sync the Speedo or the swapped BCU will put a new value up whatever’s greater???
Will have a search as well and see what pops up rechristen as well

Cheers Lemo

Automatic? May be in the inhibitor/xyz switch?

Maybe? selects all gears and displays each in the IP display plus with the nanocom connected it switch’s each xyz on and off when moved etc.

Originally Posted by Lemo

....
like starter contacts but it’s not, I’ve tested and found I’m not getting power to the solenoid wire C0179-1 at the fuse box starter relay or at the starter.

.....

Not 100% clear on this part.

When you say not getting power C1079 at the fuse box or the starter solenoid .. do you mean no power at the relay pins on the fuse box, or no power out of the relay itself to C0571-2 pin at the connector to the solenoid wire?
They are different things.
If you have no power at the relay, maybe pull the fuse box apart a little, and check for corroded connections that could cause intermittent contacting there. Fuses etc ...

Another 'out there' possibility .. inertia switch intermittently contacting and not?

You said "like the starter contacts, but it's not ..." so by this do you mean you hear a click of some kind.
If so, at the starter solenoid?(unlikely considering there's no power on the wire).
If you do hear a click, is it from the relay maybe?

Originally Posted by AK83

Not 100% clear on this part.

When you say not getting power C1079 at the fuse box or the starter solenoid .. do you mean no power at the relay pins on the fuse box, or no power out of the relay itself to C0571-2 pin at the connector to the solenoid wire?
They are different things.
If you have no power at the relay, maybe pull the fuse box apart a little, and check for corroded connections that could cause intermittent contacting there. Fuses etc ...

Another 'out there' possibility .. inertia switch intermittently contacting and not?

You said "like the starter contacts, but it's not ..." so by this do you mean you hear a click of some kind.
If so, at the starter solenoid?(unlikely considering there's no power on the wire).
If you do hear a click, is it from the relay maybe?

For clarity I’m not getting any click, nada nothing... and with a test light at the stater motor relay output C0571-2 no power.
Or the BCU closing the return path to allow this.

So pretty sure it’s a BCU fault as it’s not closing the contact to allow power to the starter relay, all else tested ok as per diagram.
And as mentioned in another post I’ve had the B with the cross indicating in the cluster display, so the BCU isn’t happy!!

Picked up a second hand BCU and instrument Cluster from a D2a for a good price and will see how that goes. It’s got less Km then mine so should sync up ok as well.

Also I’ve never had water in the drivers side fuse area and wouldn’t think there’s corrosion but I’ve had it in the passenger side, will check the fuse box this afternoon anyway to rule that out.

Cheers Lemo