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  #11  
Old 08-02-2018, 12:01 PM
nedm1989 nedm1989 is offline
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I'm pretty sure the fan couplings are purely electronically controlled via the bcm and ecu on our v9x models, in essence the same way an air con compressor is turned on with a magnetic clutch except this one has variable lock up points, which vary based on about 11 inputs from all around the car
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  #12  
Old 08-02-2018, 12:43 PM
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There is definitely something different about the fan couplings. There are 3 different part numbers listed

V9x is 21082-5X20A
VQ40 is 21082-EA200
YD25 is 21082-EB30A

According to parts photos I've seen, the v9x an extra bit with an electrical connector on the rear of the viscous coupling assembly.
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  #13  
Old 09-02-2018, 04:57 AM
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just looking at the pics of that part number, it looks like its ecu controlled.
now the catch will be is it ecu problem, actuator problem or silicone oil problem. i'm assuming its still a hydraulic type but with an actuator to control the valve.
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  #14  
Old 10-02-2018, 02:56 AM
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V9X ENGINE COOLING SYSTEM
Electric / Viscous Cooling Fan
The engine driven Cooling Fan has a viscous
coupling & which is electrically operated via a
signal from the ECM (via the IPDM E/R). A
Fan speed sensor which sends a signal
direct to the ECM is incorporated into the hub
as well.
The Fan is mounted on a pulley which is in
turn driven by the auxiliary drive belt.
The Cooling Fan is driven separately to the
Water Pump.
NOTE:
An electrically operated cooling fan is not
fitted to V9X equipped vehicles.
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  #15  
Old 10-02-2018, 07:06 AM
Markev Markev is offline
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Thanks nedm1989, bods, tweak’e & bazt.
It’s good for me to have some background information, although I’m about of my depth in understanding: but I am enjoying the challenge of learning. Hopefully the Nissan dealership will be familiar with the engine & fan. There are very few Pathfinder Ti550’s around here (we’ve seen one other), but I think there are a few Navaras with the same engine, so the dealership hopefully will be familiar with the fans operation and be able to determine what’s stopping it from working. I’ll report after next week’s appointment. Hopefully it won’t take as long for them to get the parts and find the time to do the job. We love the car and it’s great for the caravan towing. Thanks again. Great forum.
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  #16  
Old 19-02-2018, 07:42 AM
Markev Markev is offline
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Nissan service dealership today confirmed the engine fan coupling is faulty. $126 charge for approx 40 minutes diagnosis. I now await availability of parts, quote and indication of when it could be done. Hopefully hear something tomorrow. Things donít happen quickly.
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  #17  
Old 20-02-2018, 03:30 AM
Markev Markev is offline
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Quote for part came today. $596 for the fan coupling. Cannot quote labour - they haven’t done one before. Coupling has to come from Noth America with a minimum of three weeks. Tried A couple of automotive shops for other options but apparently there are no ‘after market’ couplings available. Looks like a month before we’re fixed. Would this be a ‘normal’ Experience?
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  #18  
Old 20-02-2018, 09:53 AM
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Old.Tony Old.Tony is offline
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Not in the least.

Have a look at this page. That's the last fan I bought and it's still going strong. Price is pretty good too. Service was outstanding. I strongly recommend giving them a call in the morning and see if they can help with the V9X.

The alternative is to head to your local Toymotor dealership and buy some Viscous Fan Hub Silicone Oil. Here's a link showing what I mean. Remove yours, open it, pour some of this in, close it back up and reinstall.
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  #19  
Old Yesterday, 12:04 PM
Markev Markev is offline
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Thanks ‘Old.Tony’ for your thoughts. I admire your mechanical skills and knowledge. I have none!
I rang the next nearest Nissan dealership 200km down the road. Spoke to parts department. After giving him the VIN no. he said the part was available overnight from Melbourne. He put me thru to service. They weren’t keen to order part until they’d made a diagnosis. Drove down the next day and they confirmed the original diagnosis and ordered the part. It arrived the next morning and they had it fitted the next afternoon. Total cost $830. The coupling was $70 cheaper than original quote. Labour was expensive I guess but I was grateful for their prompt service. They left me with a wad of paperwork: methodology of component function test, diagrams, ECS wiring diagrams - all with handwritten notes of voltages, readings etc.
Overall: disappointed with my local dealership; pleased with the response and accuracy of the next dealership and that the engine fan (& hence aircon) is working again. Hope there’s no more major failures within the car. How come it happens six months after the extended warranty expired!!!!!!!!
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  #20  
Old Yesterday, 09:40 PM
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My first failure of this component happened during warranty (lucky eh?). My dealer first blamed the radiator itself and sent me to a radiator specialist who took 30 seconds to point back to the fan and back in the direction of the dealer.

The sad part is that although our dealers are supposed to know our cars very, very well, the truth is that the people hired by dealers get their job and have to follow a specific set of instructions written by the manufacturer for fault diagnostics. Common sense is unfortunately not always involved, and it may take some time for the dealer mechanic to become aware enough of what common issues each model of car has before they can be more reliable - and by that time, they get a better paid job at a private mechanical workshop.

Glad to hear yours is fixed, though. Bit pricey but at least the job is done!
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