Clubjazz - Honda Jazz & HR-V Forums
Honda Jazz Forums => Honda Jazz Mk2 2008-2015 => Hybrid Mk2 2011-2015 => Topic started by: Chris Hunt on December 13, 2020, 10:55:53 PM
-
Hi All,
my Jazz IMA needs a new battery cooling fan as the one fitted takes enough current to blow fuse 53 and switch the IMA system off.
Question is: Secondhand Jazz units are rare but Civic IMA fans are available - are these the same fan?
They are a different part number but is this only the housing?
Thanks
-
Before junking the old fan. remove it and clean it out (See YouTube). Often full of dirt and overheat as a result
-
Thanks for the feedback, took the fan apart and check the transistors driving the motor - one was shorted so purchase a better equivalent from RS and fitted yesterday. Test drive today of 25 miles+ with lots of full load acceleration and all works well. Fix was 1 MOSFET and 1 fuse, less than £3.
Don't let Honda Dealers write off your older IMAs, just fix them.
-
Brilliant result..
-
Brilliant result..
Agreed 8)
Can't beat a cheap fix!
-
Thanks for the comments.
A bit of background that might help others.
IMA light came on and no IMA features active on hottest day of the summer 4 up going up hill - a clue?
Looked complex so took to main dealer who wanted £++ for diagnostic time but also ME to purchase new inverter and control modules to allow them to complete diagnostic only, not a fix. Cost about £5500. They also offered £100 for the car as trade-in (we buy any ... quote £5400). Not too happy with that so purchased secondhand rear assembly and went down several blind alleys testing and balancing batteries etc. Fuses and fan were asked about but dealer said they were good.
Further searching on web talked about Fuse 53 which was blown. System worked with new fuse and fan disconnected until battery got hot enough to ask for fan then IMA light on but still operating. Tried to find a secondhand fan but none so attempted fix. Beware if doing the same, board uses lead free solder that melts about 50C higher than normal soldering irons but else easy.
Enjoy.
-
Thanks.
Always knew main dealers had minimal electronics expertise . (They usually do not need it due to reliability)
-
Always knew main dealers had minimal electronics expertise . (They usually do not need it due to reliability)
If there isn't a replacement assembly on the shelf, they've had it!
-
Thanks for the comments.
A bit of background that might help others.
IMA light came on and no IMA features active on hottest day of the summer 4 up going up hill - a clue?
Looked complex so took to main dealer who wanted £++ for diagnostic time but also ME to purchase new inverter and control modules to allow them to complete diagnostic only, not a fix. Cost about £5500. They also offered £100 for the car as trade-in (we buy any ... quote £5400). Not too happy with that so purchased secondhand rear assembly and went down several blind alleys testing and balancing batteries etc. Fuses and fan were asked about but dealer said they were good.
Further searching on web talked about Fuse 53 which was blown. System worked with new fuse and fan disconnected until battery got hot enough to ask for fan then IMA light on but still operating. Tried to find a secondhand fan but none so attempted fix. Beware if doing the same, board uses lead free solder that melts about 50C higher than normal soldering irons but else easy.
Enjoy.
I'm sure this post will be worth it's weight in gold to somebody at some point in the future 8)
-
Thanks for the feedback, took the fan apart and check the transistors driving the motor - one was shorted so purchase a better equivalent from RS and fitted yesterday. Test drive today of 25 miles+ with lots of full load acceleration and all works well. Fix was 1 MOSFET and 1 fuse, less than £3.
Don't let Honda Dealers write off your older IMAs, just fix them.
A top class post, Just £3 to save a valuable car and snatch their owners from the jaws of despair.
Please post the a detail for the Mosfet, the RS part number or the manufacturer's device number
-
The whole fan test and repair as follows.
You will need a hot (lead free) soldering iron, a solder sucker and normal hand tools.
Remove cover from fan.
Locate the three large soldered connection to motor winding in the centre of the board and unsolder these.
Look at each power transistor and identify the thin track to each - this is the gate drive and NOT the terminal to test.
Measure the resistance between the other two 'thick track' contacts on each transistor in turn. The broken one will measure a very low resistance.
Transistors fitted are type 2SK3755, you can get these from RS or Amazon but long delivery when I wanted some.
Transistor used was a TK72A12N1, (RS 896-2432) slightly higher thermal resistance but lower on resistance.
Remove the heatsink from the board and transistors. This involved digging solder from cross head screws but easy enough.
Unsolder the faulty transistor, preform the legs of the new one and carefully solder it in making sure solder does not bridge to other tracks.
Refit heatsink, resolder motor windings, cover on and all done.
Enjoy
-
Thanks a lot!!!!! Same transistor successful replaced in My 2011 Insight. Original replaced same same as you described!!!
You deserve some cold beer!!!🍺🍺🍺
-
Hi Chris,
I have the same blowing fuse 53 on my Honda Fit Hybrid.
Was this a long term fix.
Cheers
Nic
-
Wish I read this before.
Anyway my fan had recently been replaced for a little more than 3 pound. And since the repair the fan goes on often and full RPM. It's quite loud but I feel hardly any airflow at the duct in/outlet.
On hot days, 26+ degC the power output to the 12V battery drops for 7sec intervals resulting in battery warning on the dash when many accessories are used.
Any clue what this could be?
-
-
there was hardly any dust build up, but the new fan doesn't seem to displace much air when they test it. This seems to be the culprit (lack of cooling), but the reason why is unclear. It's making the RPM's. It's a honda original fan. The connector can go in only one way.
Frustrating...
-
a question for the guys who replaced the fan or repaired and placed it back:
Is there any way to fit the fan wrongly? From watching the vid in previous post it seems it can go in only one way. I'm puzzled as to why a new fan has gone in, battery pack heats up, fan goes in to max rpm mode and still doesnt displace much air.
Seems like reverse rotation however if it goes in one way only and the plug can go in one way only, this could not be possible.
Any thoughts are welcome, I'm lost and need to wait 2 weeks since the hybrid expert at honda is on holiday. They say they get readings of 90degC on the battery pack so it worries me a bit, may get rapid degradation on the hybrid batt.
-
Thanks @madasafish, the video helped a lot. Opened the system today and found the cause!
The garage put in a wrong fan! The blades are oriented in the wrong direction.... See the attached pic
Edit: Also Honda confirmed. Apparently they mounted a CRZ fan which has the exact same shape, mounting plate and electric connector plug.
Hope this helps someone someday
-
Had a similar problem with my 2011 ima jazz when I fitted second hand fan unit turns out the insight fan and the jazz one will not interchange after a short run fan on at full speed and little flow through ducts purchased new fan from. Japan less than half price of uk version all OK now 😊
-
Had a similar problem with my 2011 ima jazz when I fitted second hand fan unit turns out the insight fan and the jazz one will not interchange after a short run fan on at full speed and little flow through ducts purchased new fan from. Japan less than half price of uk version all OK now 😊
Where did you purchase the fan? I’ve already replaced one of the fuses, but shortly after, another one blew. I replaced that as well, but I’m concerned this might keep happening. I don’t want to risk breaking down in the middle of the road, so I think it’s best to buy a new fan.
Thanks.
-
https://jp-carparts.com/honda/part_detail.php?maker=honda&type=FIT%20HYBRID&cartype=3640&fig=B&fig1=1324&fig2=8
This one maybe?
-
I am unsure of the total cost after accounting for taxes, VAT, shipping fees, and other potential charges.
They’ve mentioned that there are no returns or refunds. Thanks anyway! I’ll wait to see if anyone else has other suggestions; if not, I’ll go ahead and order it from there.