Thread: Electronic Gremlins

Checked all the earth connections, not just under the bonnet, but everywhere?

Originally Posted by scarry

Checked all the earth connections, not just under the bonnet, but everywhere?

No I haven't done that thanks. Does one just hunt around for them, or is there a list of earth locations I might be able to get hold of?
Andrew

Originally Posted by Andrew Halliday

Hi There,



2. The car alarm randomly goes off. e.g in the garage. This is becoming more and more frequent and in the last week has occurred almost daily.

Not sure about the other items, but I've had this issue over the last couple of years. There are other threads on the forum about this - for me, it was the bonnet switch.
It started out very infrequent, but got more and more common (every couple of days). Very annoying, especially if I wasn't around...
I removed the "bonnet latched" switch (underneath the RHS latch), joined the wires and sealed it all up.

Good as gold now!

Originally Posted by Ghost-Who-Walks

Not sure about the other items, but I've had this issue over the last couple of years. There are other threads on the forum about this - for me, it was the bonnet switch.
It started out very infrequent, but got more and more common (every couple of days). Very annoying, especially if I wasn't around...
I removed the "bonnet latched" switch (underneath the RHS latch), joined the wires and sealed it all up.

Good as gold now!

Thanks!

Originally Posted by Andrew Halliday

No I haven't done that thanks. Does one just hunt around for them, or is there a list of earth locations I might be able to get hold of?
Andrew

Thought you may ask that,dont know where they all are.
Maybe search on here or other forums may help.

A bit of an update...&nbsp;&nbsp;<br>Hunted around for a loose earth and found a loose wire - but brown and blue not an earth.&nbsp; Reinsulated with electrical tape.&nbsp; Couldn't find anything else obvious.&nbsp; &nbsp;<br>Reset the AV system by pulling the fuses again and wow the bluetooth was working.&nbsp; Took a call and made 2 calls but at the end of the second call the bluetooth crashed again.&nbsp;<br>After this the radio was intermittently cutting out and radio, CD and DVD buttons were greyed out.&nbsp; All the hard console buttons e.g NAV Home etc were not working.&nbsp; have tried to attach video but won't upload.&nbsp; &nbsp;&nbsp;

Originally Posted by Andrew Halliday

A bit of an update...&nbsp;&nbsp;<br>Hunted around for a loose earth and found a loose wire - but brown and blue not an earth.&nbsp; Reinsulated with electrical tape.&nbsp; Couldn't find anything else obvious.&nbsp; &nbsp;<br>Reset the AV system by pulling the fuses again and wow the bluetooth was working.&nbsp; Took a call and made 2 calls but at the end of the second call the bluetooth crashed again.&nbsp;<br>After this the radio was intermittently cutting out and radio, CD and DVD buttons were greyed out.&nbsp; All the hard console buttons e.g NAV Home etc were not working.&nbsp; have tried to attach video but won't upload.&nbsp; &nbsp;&nbsp;

I have suspicions about the battery if the Bluetooth has died and the other Nav buttons don't work. In my D3 the audio actually indicates that it is shutting down when battery voltage is low. When my previous starter battery was dying I would get regular transmission faults after short trips and various other issues too.

Your issues could be related to something else but as I said I think the battery would be the first thing I would consider.

Thanks Yes I agree the battery. I had hoped you were right. Had battery tested at battery sales and tested perfect. I insisted on a new battery anyway (seemed cheaper than any other option), and hey presto - everything works fine (system must have rebooted when battery changed). Phone paired etc. I drove to work car park (5 min) and parked for a few hours. Got in car to drive home - everything still works fine. Call a friend on the way - all good. 20 min conversation no problem. Park car in home garage and lock it - walk inside.
5 minutes later car alarm goes off for no reason. Turn alarm off and start car - no phone!!!! Turn car off and then ignition/acc on (I was still in the garage and didn't want fumes) and after fiddling around for 5 min I get a message on the display - low battery and the head unit shuts down - with a brand new battery.

I sounds like some sort of short somewhere - but I haven't the foggiest where.

I borrowed a mates code reader and there was an insane number of codes. Lots were repeated and were about lost communication with x module (for every module you can think of).

The most interesting ones however were:
U0018 medium speed CAN bus (-) shorted to bus (+)
B1C98 Left corner lamp circuit
B1D65 right headlamp swivelling motor circuit

FULL LIST IS INSANE:
U0001 high speed CAN communication bus
U0126 lost communication with steering angle sensor module
U0401 Invalid data received from engine control module / power train control module
U0010 medium speed CAN communication bus
B100D column lock authorisation
U0140 lost communication with the body control module
U0155 lost communication with instrument cluster control module
U0164 lost communication with heating ventilation and air conditioning control module
UO128 Lost communication with parking brake control module
U0159 lost communication with parking assist control module
U0101 lost communication with transmission control module
U0184 lost comm with audio unit
U0208 lost comm with the seat control unit
U0242 lost comm with the headlamp control module B
U0402 invalid data received from the transmission control module
U0422 invalid data received from the body control module
U2013 Switchpack
U3000 control module
B102B Passive key
B1B33 Target identification transfer
B1B01 key transponder
B1311 clock module
B10AD rain sensor
B11DB battery monitoring module
U0121 Lost comm with ABS control module
B1087 LIN bus A
B12C9 LOCAL INTERCONNECTION NETWORK BUS “E”
B1C53 front wiper intermittent data
U0018 medium speed CAN bus (-) shorted to bus (+)
U0300 internal control module software incompatibility
B1D65 right headlamp swivelling motor circuit
B1010 Video input C
DVD unit
B1C98 Left corner lamp circuit
U3003 Battery voltage
U3000 control module
U0073 control module communication bus off
U0300 internal control module software incompatibility
U2003 FIBRE OPTIC Communication bus

So i'm reluctantly taking her in to the dealer for a diagnostic assessment.