Both cooler fans needs to run with A/C on, for a Citroen Jumper/Relay III 2016 ?

[perfidus]

Hi all and glad to meet you as this is my first question asked on the FCF forum.
Since I bought my Jumper(Relay) III campervan (2.0 BlueHDi 120KW from 2016), I've notice that only one engine cooler fan spins when I set the A/C on. Is this normal for a warm engine (coolant temp needle stays in the middle of the scale)? The fan from the right side of the cooler as you look from behind the wheel was never on. First I thought is something broken in the circuits but both the fuses an the relays (F06 and F07, T06 and T07) are OK and both fans start when I bypass the relays contacts.
Who can explain to me how this engine (DW10FUC - AHP) makes the decisions on how to controls the two cooler fans?
Two mechanics told me that it shoud start both fans when A/C is running and engine is warm, but they are not Citroen specialists. This also could be the reason for a higher pressure reading in the A/C system, when engine is rev up, they said, when I checked and adjusted the refrigerant in the system.
Thanks!

[perfidus]

This is how the two relays for the fans are driven by the p21 and p28 pins in connector 32V NR (BF01 fuse box) but I don't understand the schematics as where do this pins are connected, in wich ECU.

[GiveMeABreak]

One fan will always be on with the A/C, but as for the other one, it probably does not require being on (to save energy) unless the engine temperature is very hot. I'd leave it alone.

[perfidus]

Thanks for suggestion Mark. I will leave it for now, maybe will test the fans with diagnose when I'll get one to get it out of my head.
And the issue with the pressure of refrigerant, if it's a real issue, I think it is caused by a bad condenser unit, there are some aluminium fins missing from the cooling tubes and others are very dented by small rocks and other debris. I will probably need to change the unit with a new one.

[GiveMeABreak]

Yes, you can always test it with Diagbox using an actuator test on fans to test operation, which will mean it's working. If there was a pressure issue on the A/C system it will likely go into backup mode and disable it to prevent damage to the system.

[perfidus]

Got one Lexia XS Evolution interface (921815/C) and verified the cooling system with DiagBox 7.83.
The fan no.1 is starting somewhere above 80 degrees, fan no. 2 only with A/C on.

Before opening a new thread, I noticed that with my VIN number engine ECU was not recognised and two modules were not comunicating (errors on Airbag ECU and Instrument panel ECU) - this may be an issue with the older 7.83 version?
If I click on the engine ECU i have to choose between three options: DCM62_F?, SID208? and EDC17CP52_UDS?, the later is for a 180HP 3.0HDI engine. Choosing DCM62_F gives another four-five choices and I found my engine code (AHP/AH03) within them.
Readings from the sensors are coherent with this selection. With SID208 (guess it's a Siemens ECU) some readings are not normal.
I will try to install tomorrow a newer version of DiagBox and check if the two modules are comunicating ad ECU is recognised.

EDIT: this morning I've checked with a new version of DiagBox, the 9.68 Free (by Fantomel - thanks FCF). The engine ECU is clearly DCM62_F, but there are still communication errors with a few modules, I will go searching for them and maybe open a new topic.

[GiveMeABreak]

If you don't have a full chip revision C interface (VCI) it won't make any difference what software you use. Later vehicles require a CAN compliant interface and some of the cheaper clones are missing essential hardware from the interfaces which is why they are cheaper.... So this is something to consider and check first of all.

[perfidus]

I open the VCI and is full chip rev.C as in pictures, 12 relays etc. I ordered an adapter for newer Jumper/Boxer - S.1279 and wait to see if the VCI can communicate with those ECUs (instrument and airbag). The software version matters to me, because with the newer version it appears to be two more modules that can't communicate. But i doubt that those modules are corect (blind spot monitoring - not sure I have those). It is possible to verify the factory fitted equipment by VIN?

[perfidus]

I have the van checked by a friend with an universal tester (tablet with touch screen type - don't remember the model) and the Airbag ECU appears to comunicate with the tool, with no error. This is not good as one seatbelt pretensioner is obviously disconnected from cabling. Of course it may be a resistor placed across the connector but I didn't see one.
The Instrument Panel was not in the list of ECUs, try to test all the lamps but couldn't find the corresponding test page.

[GiveMeABreak]

Hi, no you don't have parking assistance and no blind spot monitoring, and as you asked here's your factory build sheet:

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