Airbag error B0143-64 Plausibility error HELP!!!

[growly_bear]

Hello All, I really need your help!

2015 3.0 euro V (I believe as that's the fusebox I can see)

I've got an airbag error, but not the usual ones. Mine is B0143-64 Plausibility error.

In MAR the airbag lights, does its self checks and then goes out. About 4 ish seconds later, there is a beep and the airbag light comes on, with a message to check the passenger airbag.

Using MES, I read the B0143-64 error code.
Using eLearn, DTC I have the following checks

Using MES I can operate the airbag light on the dashboard, so moved on to check number 2.

I disconnected the Hab and starter batteries (after following procedures to allow for dissipation etc) and disconnected the airbag ECU connectors.
Below is the wiring diagram

I thought that the best place to start was the CAN lines (pins 7 and 8 of Connector A)
The wire colours for these CAN wires does not tally with the diagram above. Mine are white and blue. All others on Connector A do.

There is also a wire from pin 9 but this is not shown in the wiring diagram

Have I got the correct diagram?

I'm a complete novice with this depth of Electrickery and your help would be gratefully received to be able to sort out this fault.

 

[MichaelT]

Is the yellow connector under the seat fully together?

 

[Derbyshire wanderer]

Power down completely and disconnect the yellow connectors, check the pins are clean and shiny and refit. Check the cable connections to each pin for being loose too.
Then clear all faults and retest.

 

[growly_bear]

Is the yellow connector under the seat fully together?

I'll check them again tomorrow

 

[growly_bear]

Power down completely and disconnect the yellow connectors, check the pins are clean and shiny and refit. Check the cable connections to each pin for being loose too.
Then clear all faults and retest.

Thanks.
I used MES when the fault originally occurred and all resistances through the yellow connectors was OK.

I will re-run tomorrow and post the values shown.

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[Derbyshire wanderer]

Thanks.
I used MES when the fault originally occurred and all resistances through the yellow connectors was OK.

I will re-run tomorrow and post the values shown.

But the resistance under test is not always an indicator of resistance when being monitored. Diagnostic testing is always open to interpretation and from experience cannot perform as well as MK1 eyeball for mechanical issues