Citroen Jumper III 2016 (Euro6) - Instrument panel and Airbag ECUs communication errors

[perfidus]

Hello,
I'm starting this topic because I need help with some issues and error codes. My Citroen van is a BB furgon from 2016, chassis VIN number is VF7**************[VIN obfuscated, can be read by forum staff].
Especially need to sort out some weirdo things that showed up after scanning my "new" Jumper van with Diagbox 7.83 (and the same with 9.68 Free).
I'm using a Lexia interface full chip FW 921815C , recently purchased from this shop: https://www.aliexpress.com/item/1005007009192418.html?

So, I have Instrument panel ECU communication trouble and Airbag ECU communication trouble. What can cause that?
As I mentioned in my first post, the van was converted into a camper and I suspect that some wiring may be affected.
First thing noticed - passenger seat belt tensioner and switch is disconnected from the yellow harness underneath but there are no warning lights on the instrument panel.
The second - although the engine has a few errors and check engine message on the display, the Check engine warning light is off.
I can say that it was forced OFF by someone to pass the inspections, the light doesn't come ON at ignition ON.
I need to check also the airbag light, as I said there is no indication of a fault with Airbags.
The instrument cluster is working fine, no signs of tampering on the other lights, but I will return with a picture of the panel at ignition ON maybe someone will observe anything odd.
Any suggestions for a starting point?

[wheeler]

Are you using the Fiat adapter with diagbox?
If not you won’t get comms with all ECUs

[perfidus]

No i don't. Thank you for your suggestion/confirmation, I was afraid that this is the case, the software asked for the switch on the adapter to be "in position B".

[wheeler]

You need one of these

[wheeler]

What is the issue with the airbags then?

Its not uncommon if the van is being converted to a camper that the middle seat is removed. If a resistor is not used in place of the old seat belt pre tensioner it will cause an airbag fault .

[perfidus]

Thanks. The factory passenger seats are moved in the back behind a table and the front seats are rotating type, the one of the front passenger being exactly the same as driver seat. Noticed the yellow connector underneath - îs not being wired to the floor harness.

EDIT: I see the point of your question, airbag may be OK (the van has only one driver airbag) - the problem is with one seatbelt pretensioner, the front passenger's one is not connected. When I'll succeed to connect with Airbag ECU I will see what is missing/in error.

[perfidus]

Waiting for the PSA S.1279 Interface to arrive, i bumped into this topic:
viewtopic.php?p=772678#p772678

So for example, if your vehicle provides key messages via the head unit and you have an aftermarket system, then it won't be able to communicate issues to the driver. So you are on dodgy ground to start with

My campervan also has a dumb aftermarket 1 DIN unit (but I don't know what equipment was fitted at the factory, if any) - could it be possible to affect the dashboard warning lights?
I think I asked before - is there any source of information to find the original equipment of the van with the VIN number?
Without the adapter it appears to be two more modules that can't communicate. But i doubt that those modules are corect (such as Blind Spot Monitoring left and right)

[GiveMeABreak]

If you're asking what radio equipment you had from factory, then the answer is none! It only came with 4 speakers, but no radio.

Here's you build sheet from factory:

Vehicle Characteristics
Vehicle family	RELAY III
AS/RP N°	14483
Warranty Start Date	02/09/2016
Engine serial number	10 DYZZ 4012521
OPB	J0ZI
BER	e3*2007/46*0046*11
General Information
PRODUCT TYPE	COMMERCIAL VEHICLE
COMMERCIAL MARQUE/COMPONENT TYPE	CITROEN
VEHICLE FAMILY	RELAY III
SILHOUETTE	EXTENDED VAN H3 TYPE 16H
TRIM LEVEL	STANDARD
ENGINE	DW10FUC FAP DIESEL
TRANSMISSION	BVM6
PAINT TYPE	NON-METALLIC PAINT
BODY COLOUR	EWP - BANQUISE WHITE PAINT
INTERIOR TRIM TYPE	CLOTH DARKO + TWILL "35"
UPHOLSTERY COLOUR	"FX"
GEARBOX (CHARACTERISTICS)	BVM6 MLGUC14
CONVERSION GUIDANCE	WITHOUT CONVERSION
DEFINITION TO FOLLOW	MID-LIFE
ENGINE (TYPE)	EW/DW
Vehicle Characteristics
TRIM LEVEL	STANDARD
PAINT TYPE	NON-METALLIC PAINT
BODY COLOUR	EWP - BANQUISE WHITE PAINT
INTERIOR TRIM TYPE	CLOTH DARKO + TWILL "35"
UPHOLSTERY COLOUR	"FX"
GEARBOX (CHARACTERISTICS)	BVM6 MLGUC14
STEERING	VARIABLE POWER STEERING
SPEEDOMETER DRIVE	TACHO TORQUE 18X14
Fuel Supply-Engine
ENGINE	DW10FUC FAP DIESEL
FUEL	DIESEL GRADE DA/DE/DE+
ENGINE (TYPE)	EW/DW
CAPACITY	2000 CM3
VEHICLE EMISSIONS STANDARD (TYPE APPROVAL)	DEPOLLUTION EURO6 (HOMOLOGATION)
CRANKCASE GAS CIRCUIT HEATING	WITH HEATER CASING GAS CIRCUIT
PARTICLE FILTER	WITH PARTICLE EMISSION FILTER
STOP AND START	WITHOUT STOP AND START
Gearbox Transmission
TRANSMISSION	BVM6
GEARBOX (CHARACTERISTICS)	BVM6 MLGUC14
FINAL DRIVE RATIO	CP 14 X 75
SPEEDOMETER DRIVE	TACHO TORQUE 18X14
WHEEL (TYPE)	STEEL WHEELS
INFLATION PRESSURE LOSS INDICATOR	WITHOUT TYRE DEFLATION INDICATOR
GEARBOX TYPE	MLGU6 MANUAL GEARBOX
Suspension-Steering-Brakes
STEERING	VARIABLE POWER STEERING
TRACTION CONTROL	ANTISLIPPING
SUSPENSION	DOUBLE-LEAF RR HEAVY DUTY SUSPENSION
SUSPENSION (ARCHITECTURE TYPE)	METAL SUSPENSION
DYNAMIC STABILITY CONTROL SYSTEM	ELECTRONIC STABILITY PROGRAM
EMERGENCY BRAKING ASSISTANCE	WITH EMERGENCY BRAKING ASSISTANCE
Body Fittings
TOWBAR	WITHOUT TOWBAR
AERIAL	LONG ROOF AERIAL
SKIP	W/O FLAT HAMPER
CABIN	CLOSED SINGLE CAB
CHASSIS	STANDARD CHASSIS
PAYLOAD	HEAVY PAYLOAD 16Q
SIDE MOULDINGS (TYPE)	LATERAL PROTECTOR MASS TINTED
EXHAUST TAILPIPE	LEFT-HAND SIDE
INDICATORS	LONG VEHICLE SIGNALLING LIGHT
ADDITIONAL SHIELD (UNDER ENGINE)	W/O ENGINE UNDERSHELDING
EXT. REARVIEW MIRROR COMP. FUNCTION	EXT MIRROR MANUAL-FOLD BACK
OPENING OF MOVING PANEL	DOOR OPENING AT 270 DEGREES
WINDSCREEN WIPER	FRONT WIPER BLADE W/O RAIN SENSOR
HEADLAMP WIPER	W/O HEADLAMP WIPER
SIDE LOAD DOOR	RH SLIDING SIDE METAL DOOR
BUMPER	DYED FRONT/REAR BUMPER
MUDFLAP	WITHOUT MUDGUARD
ROOF	STANDARD ROOF PNL
LUGGAGE RACK	WITHOUT ROOF BARS
FRONT FOGLAMP	NO FRONT FOG LIGHTS
EXTERIOR REAR VIEW MIRROR (PASSENGER SIDE)	PASSENGER ELECTRIC DOOR MIRROR
SPARE WHEEL MOUNTING	STANDARD SPARE-WHEEL CARRIER
WHEEL EMBELLISHER (TYPE)	WHEEL TRIM WITHOUT CUSTOMER CHOICE
BODY CONVERSION	WITHOUT
REAR WINDOW (TYPE)	WITHOUT REAR WINDOW
GLASS (APPEARANCE)	TINTED
WINDOW (TYPE)	LAM W/SCREEN + SIDE + RR TOUGHENED
SIDE WINDOW (COMM. VEH. ONLY)	WITHOUT SIDE WINDOW
ROW 3 SIDE WINDOW	WITHOUT SIDE WINDOW 3ND ROW
HANDS FREE ACCESS AND STARTING	NO ACCES AND HANDSFREE STARTING
Interior Fittings
INTERIOR TRIM TYPE	CLOTH DARKO + TWILL "35"
ANTI-THEFT ALARM	WITHOUT THEFT PROTECTION ALARM
REAR SEAT	WITHOUT REAR SEAT POSITION
SUPPLEMENTARY SEAT	WITHOUT SUPPLEMENTARY SEAT POSITN
CABIN SEAT	2 PLACES PASSENGER BENCH
CIRCUIT BREAKER	WITHOUT BATTERY CUT-OFF
CLIMATE (AMBIENT TEMP)	COLD COUNTRIES
SPEED GRADUATIONS	SPEED GRADUATION IN KM/H
DRIVING POSITION	LEFT-HAND DRIVE
REMOTE CONTROL	REMOTE CONTROL ASSEMBLY
ADDITIONAL HEATING	WITHOUT ADDITIONNAL HEATING
FRONT HEAD RESTRAINT (STYLE)	OPEN FRONT HEAD RESTRAINT
TIMER	WITHOUT TACHOGRAPH
RADIO CONTROLS	WITHOUT REMOTE RADIO CONTROL
SIDE DOOR CONTROL MECHANISM	NON-MOTORIZED, ELECTRIC LOCKING SIDE DOOR
FRONT PASSENGER SEAT HEIGHT CONTROL	WITHOUT FRONT PASSENGER SEAT HEIGHT ADJUSTMENT
DRIVER SEAT CONTROL	DRIVER SEAT MANUAL CONTROL
FRONT PASSENGER SEAT CONTROL	PASSENGER FRT SEAT MANUAL CNTR
FRONT SEAT	WITH DRIVER’S SEAT
DRIVER SEAT ADJUSTMENT	DRIVER’S LUMBAR ADJUSTMENT
FRONT PASSENGER SEAT ADJUSTMENT	WITHOUT FRONT PASSENGER’S SEAT ADJUSTMENT
FRONT SEAT ARMREST	FITTING WITH DRIVER’S FRONT ARMREST
STOWAGE BIN	WITHOUT SETTING BOX
SATELLITE NAVIGATION SYSTEM	WITHOUT NAVIGATION SYSTEM
TRAFFIC INFORMATION READER	WITHOUT LATERAL TRAJECTORY MONITORING
OPENING OF MOVING PANEL	DOOR OPENING AT 270 DEGREES
MISC. INT. ACCESSORY	DOCUMENT HOLDER TABLE
HEATING ELEMENT	NON HEATED SEAT
FRONT LATERAL AIRBAG	WITHOUT FRONT SIDE AIRBAG
PASSENGER AIRBAG	NO PASSENGER AIRBAG
ADDITIONAL AIR CONDITIONING	WITHOUT ADDITIONAL AIR CONDITIONING
EXTERIOR REAR VIEW MIRROR (HEATED)	HEATED DOOR MIRROR
REAR MOVING PANEL	2 REAR HINGED METAL DOORS
SIDE LOAD DOOR	RH SLIDING SIDE METAL DOOR
COURTESY LAMP	FR+RE DOORS CONT - FR+RE INTERIOR LAMP
FRONT SEAT GUARD	REMOVABLE CAB PROTECTION PANEL
RADIO RECEIVER	4 SPEAKERS WITHOUT RADIO RECEIVER
REFRIGERATION	SINGLE AIR CONDITIONING
CRUISE CONTROL	REGULATOR AND SPEED LIMIT
DRIVER’S SEAT HEIGHT CONTROL	FR + RR DRIVER HEIGHT ADJ
REAR VIEW MIRRORS	STANDARD REAR VISION
DRIVER AIRBAG	DRIVERS AIR BAG
INTERIOR PROTECTION	MID-HEIGHT INTERIOR WALLS PROTECTOR
OBSTACLE DETECTION SYSTEM	WITHOUT OBSTACLE DETECTOR
INFLATION PRESSURE LOSS INDICATOR	WITHOUT TYRE DEFLATION INDICATOR
LOCKING CONTROL	NORMAL + AUTOMATIC LOCKING
REAR WINDOW (TYPE)	WITHOUT REAR WINDOW
WINDOW (TYPE)	LAM W/SCREEN + SIDE + RR TOUGHENED
SIDE WINDOW (COMM. VEH. ONLY)	WITHOUT SIDE WINDOW
STEERING WHEEL	STANDARD STEERING WHEEL
PASSENGER SEAT PACK	BENCHSEAT WITH 3-POINT CENTRAL BELT
SUPPLEMENTARY HEATER	WITHOUT ADDITIONAL HEATING
AUDIO PACK AUXILIARY SOCKET	WITHOUT AUDIO PACK AUXILIARY SOCKET
Electrical
CIRCUIT BREAKER	WITHOUT BATTERY CUT-OFF
BATTERY (FITTING)	UPPER BATTERY
REMOTE CONTROL	REMOTE CONTROL ASSEMBLY
STARTER MOTOR	CLASS 6 STARTER MOTOR
SPECIAL LIGHTING	FRONT DAY RUNNING LIGHT (DRL)
INDICATORS	LONG VEHICLE SIGNALLING LIGHT
EXT. REARVIEW MIRROR COMP. FUNCTION	EXT MIRROR MANUAL-FOLD BACK
COURTESY LAMP	FR+RE DOORS CONT - FR+RE INTERIOR LAMP
FRONT FOGLAMP	NO FRONT FOG LIGHTS
Component Manufacturers
Miscellaneous
SPECIAL SPECIFICATION	STANDARD
DRIVING POSITION	LEFT-HAND DRIVE
RADIO HEADPHONE SOCKET	WITH ACCESSORIES SOCKET
PLATE	WITHOUT PLATFORM FLOOR
SET OF KEYS	1 HIGH FREQUENCY REMOTE CONTROL KEY+1 MAIN KEY ONLY
COUNTRY ADAPTATION	WITHOUT
EMERGENCY EQUIPMENT	W/O HELP EQUIPMENT
SURFACE CONDITIONS	GOOD TERRAIN

[perfidus]

Great, thank you!
So, no Blind Spot Monitoring as expected:
TRAFFIC INFORMATION READER - WITHOUT LATERAL TRAJECTORY MONITORING

Another thing that i must check:
FRONT FOGLAMP - NO FRONT FOG LIGHTS
There are some Foglamps in the front bumper but I nerver found the ON/OFF button, it is not on the hazard switch panel.
They are aftermarket then.

[GiveMeABreak]

So just to clarify: Lateral trajectory monitoring is actually Lane Departure Warning System, not Blind Spot Monitoring.

Active Blind Spot Monitoring usually includes additional sensors in addition to the front & rear parking sensors, The Blind Spot system has an additional 4 sensors, 2 on the front and 2 at the rear usually on the wheel arches facing outwards to detect passing objects.

As for fogs, these are referred to as 'complimentary Headlight kit' and if factory fitted (which weren't from factory in your case) will be located here:

[perfidus]

Got the adapter for Jumper III, put it on the Lexia interface and the results are the same! See picture.

One interesting fact, the SW version in the ECU is from 2017, the car is from 2016. I think someone did something in the past.

[GiveMeABreak]

Software version for what ECU?

It's not unusual for ECU software to be updated, like the BSI or the engine ECU to fix issues after the car was built. This can happen when it is dealer-serviced and you may not be aware.

Second, despite what the ad says on Aliexpress, I wouldn't trust them as far as I could throw them regarding being a full-chip kit. I've seen it here before where people have bought from those places and they ended up with a cut down version with missing hardware on the boards. It may be that or a connection / pin issue, but I'd be returning it and getting one from a trusted source.

[perfidus]

By ECU version i mean the engine ECU, DCM62_F
Regarding Lexia interface i hope you're wrong, the store has a high rating and the price was also above average, got it open and seems for me like the full chip version.

[GiveMeABreak]

Most of the parts seem ok - except for the 10k Resistor that seems missing highlighted in yellow where it is supposed to be. This can affect CAN communication.

Although (3) seems present, (1) & (2) don't:

[perfidus]

Very good observations, much appreciated.
It is a chance the missing parts to be the cause. R1 R2 in last picture are from the USB part of the interface, though.
But the next step I see is to check the wiring to airbag ECU and dashboard instrument panel, it's strange that the rest of ECUs are responsive, I could check and clear errors, do some actuator tests, read live data etc.
It can be a protocol not correctly implemented in Lexia (firmware?) , i'm going to dig the forum for more info about versions.
I might need also some 'heavy tools' such as updated schematics (what I have is from Boxer III Euro 5) and an oscilloscope.

ANYWAY...
Luckily the engine runs verry well, it have a new EGR (the old one was leaking coolant and I found some intermittent errors in engine ECU memory) and the only error is the DPF (P242F 97), is broken by the last owner and needs to be changed.
But beside this there is an Airbag/seatbelt issue, and the associated lights (that somebody else turn off by brute force).
Regarding AdBlue system (that seems deleted) there are more to mention and perhaps I will open a new topic.