BSI Problem? Electrical Gremlins - Berlingo 1.9d

[noname9]

Hello, new to the forum and looking for some advice please

It's a 2007 Berlingo 1.9d 76,000 miles - Engine running great, starting up fine, just electrical problems.

i've been trying to solve the issues but not got anywhere

The Issues I am getting:
1. Dipped beam headlights not working from steering controls.
2. Eco Mode status on centre console
3. Airbag light on
4. Speedo/Instrument not functioning correctly (no RPM, no engine temp, airbag light on, handbrake light staying on)
5. Speedo/Instrument illumination/ ALL symbols dissapear and ALL needles drop after approx 20 secs after starting engine, however just only the battery illimination light stays on after this happens.
6. No radio
7. No heater blower
8. No Wipers and No washer

I've checked the basic things, all fuses, new battery, no signs of water ingress or damaged cables... Nothing there.
So I ended up buying Lexia hoping for some clues and these are my findings:

BSI
Permanent Faults:
Communication fault with the airbag ECU (came back after erasing fault)
No Wake-up of the network by the DATAB wire

Parameter measurements:
Dipped beam control - 'Inactive' in lexia when using the steering switch module
Visibility - All controls 'Inactive' in lexia when using steering the switch module

Actuator tests:
Dipped beam - Working
Windscreen wipers - Working
Windscreen wash - Working

Instrument panel
Remote fault/intermittent fault
Engine speed incorrect value received

Switch module at the steering wheel
No faults (also checked parameter measurements - all switches working

Display
Intermittent fault
No permanent positive of the display

I have replaced the well known issue of the twisted red+white cables from engine fusebox to bsi unit - there was a break on both cables, however this did not solve any of the problems.

The finger seems to point towards the BSI unit?
Thanks for any advice

[brajomobil]

This one puzzels me: No Wake-up of the network by the DATAB wire

Like your BSI does not receive signal to start working, hmmm

But then again if you operate e.g. wipers from Lexia and they are working
that means BSI is "alive" accepting commands.

Check can wires going to BSI  (they are twisted pair of wires, don't know the color code)

Best regards,
brajomobil

[noname9]

Hello, thanks for reply, yes it's a strange one, like it's locked in eco mode. I did check red+white twisted wires from engine fusebox to bsi, there was a break on both cables and replacing them did nothing.

I did not check other cables for breaks, so I will check them all over the weekend, thanks

[brajomobil]

You can take any CAN wires and connect to BSI.
Just to rule out problems in wires going to BSI.

CAN wires are just "signal" wires nothing more and all of
the are connected together. 

Best regards,
brajomobil

[noname9]

Hello, thanks for the help!
Ok I will have to check the can cables.

looking at this diagram, I've only looked at
the 9013+9012 VAN cables and 9013A+9012A, these are the red/white twisted pairs (there is 3x twisted pairs inside cabin)

I've not checked other cables on that diagram yet, hopefully I find a break in cable!

[ian432]

Brilliant thread and advice!
Exactly the same probs as my latest acquisition, I look forward to finding a solution as much as OP

[brajomobil]

Hello, thanks for the help!
Ok I will have to check the can cables.

looking at this diagram, I've only looked at
the 9013+9012 VAN cables and 9013A+9012A, these are the red/white twisted pairs (there is 3x twisted pairs inside cabin)

I've not checked other cables on that diagram yet, hopefully I find a break in cable!

Check the one going to engine ECU , that is the main one. But, you already checked that and replaced them.
Also I have read your first post again. Please check if your alternator is charging. When engine running
check voltage across battery. Over 14,5v is the preferred voltage.

Best regards,
brajomobil

[Collapsedsuspension]

I found an interesting thing today when playing about in Lexia trying to solve my cruise retrofit problem (see thread if you know the answer!) - if I changed the 'cruise control' setting to 'cruise with limiter' (wrong setting for my car) the cluster could no longer communicate with the BSI, giving the symptoms 4 & 5 you describe. I imagine you hadn't changed any options like that but it was interesting that changing a BSI option like that would prevent comms to the cluster. Are there any settings in the BSI that don't look right? Eco mode is probably the issue - has it fallen into showroom mode or something?