JoeS
Site Moderator
Posts: 3909
Joined: Thu Dec 15, 2011 5:47 am
Location: Silicon Valley, California

Re: RBS light Alarm

Wed Aug 30, 2017 8:26 am

kiev wrote:Most likely culprit is a weak 12V battery...
Kenny, thank you for that (especially as you had also experienced this symptom) - I passed this on and suggested they do the 12v battery replacement before going to the dealer.
EVs: 2 Wht/Blu SE Prem., '13 Tesla MS85, 3 156v CorbinSparrows (2 Li-ion), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab 96
Hybrids: 48v1kW bike
ICE: '88 Isuzu Trooper. Mothballed: '67 Saab (orig.owner), '76 MBZ L206D RHD RV

JoeS
Site Moderator
Posts: 3909
Joined: Thu Dec 15, 2011 5:47 am
Location: Silicon Valley, California

Re: RBS light Alarm

Sun Sep 03, 2017 5:45 pm

The plot thickens: it turns out that "The AC stopped working a day before the problem started."

I suggested he go to the dealer. Will update when I hear back from them.
EVs: 2 Wht/Blu SE Prem., '13 Tesla MS85, 3 156v CorbinSparrows (2 Li-ion), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab 96
Hybrids: 48v1kW bike
ICE: '88 Isuzu Trooper. Mothballed: '67 Saab (orig.owner), '76 MBZ L206D RHD RV

sandange
Posts: 907
Joined: Thu Jul 05, 2012 2:21 am
Location: Quebec, Canada
Contact: Website

Re: RBS light Alarm

Tue Sep 05, 2017 4:57 am

I believe there was one AC mounting bracket failure that had resulted in the wiring harness being damaged from the vibration,
also triggering the dash board warning light.
Tesla Model 3 SR+, 2019
Previous EVs
Puey Bluey 2014 Miev
200,000 km , 124.000 miles.
Blackie - 2012 ES Miev 2 years - 67,000 km / (41,630 miles)
http://thecordstead.blogspot.ca/

Meowmiev
Posts: 2
Joined: Tue Sep 12, 2017 5:19 pm

turtle mode, RBS "!", AC

Sat Sep 16, 2017 3:48 pm

Greetings! My family is the happy new owner of a 2012 i-Miev, and we have gotten a lot of great information from reading this forum. So I wanted to join in the conversation and share our own experience of a problem pertinent to this thread, and the apparent solution.

Main Problem:
i-MiEV goes into turtle mode, with “RBS”, electric motor (“!”) and “turtle” warning lights on within seconds after key is turned to “start”. RBS becomes disengaged. (Main battery indicator above 8 lines, so plenty of charge.)
Variations:
-sometimes this occurred after shifting from P to D, E or R
-sometimes this occurred after turning the key to “start” without shifting from P
-sometimes this occurred after driving a few yards
-sometimes (rarely) this occurred after turning key to “on”, before turning to “start”

Model Year: 2012 ES

CHAdeMO quick charger: never used, our car does not have that option.
Ambient temp at time of failure: several times when the car had been resting overnight (~upper 70s New Orleans summertime nighttime temp). Problem also experienced after diving, when attempting to restart. No apparent benefit from cooling off.

AC failure. The AC stopped working a day before the problem started. Fan working, but airflow is ambient temp. The car experienced mild flooding on New Orleans street (water up to street curb level, below car door level) a couple of days before AC stopped running and turtle mode and warning lights became an issue.

Progression? initially restarting the car several times ("recycling the key") would eventually allow us to drive in normal mode. Eventually (after ~ 1 day), recycling the key was no longer effective. Of course, the impression that there was a progression may be false – we do not have statistics on this.

12V battery tested Voltage with car off ~13V. Voltage with car on, just above ~13 V. Jumper cables from the i-MiEV battery to the battery of another car did not solve the problem. Load test: Autozone said bad, Firestone said OK, Independent Neighborhood Shop said OK. Battery posts and connectors cleaned. Battery to car body ground checked.

SOLUTION: The Mitsubishi Dealer (Ray Brandt in Harvey, Louisiana), determined that the AC compressor was “shorted” (perhaps by flooding?). They disconnected the AC compressor, and since then the problem has never occurred again (2 weeks, ~ 20 drives). i-MiEV AC compressors are expensive, and the car stays pretty cool, so we will skip replacement for now.

We would like to express our gratitude to members of the forum for help received from them even before we joined.

JoeS
Site Moderator
Posts: 3909
Joined: Thu Dec 15, 2011 5:47 am
Location: Silicon Valley, California

Re: RBS light Alarm

Sun Sep 17, 2017 4:38 am

Meowmiev, welcome to the forum, thank you for your kind words and for your very precise description of the problem you've experienced. Delighted that you still like your i-MiEV (as all of us on this forum do), despite it's annoying issue.

I'm pleasantly surprised that the car is fully operable without any visible error indicators with the air conditioning compressor disconnected. This in itself is strange (but welcome in this case), as this car has so many interlocks which result in throwing a code if they're disturbed.

If I recall, that compressor is powered directly by the car's high voltage battery.

I'd like to try to get the ball rolling in helping you -

1) Is there a possibility that water damage might be covered by one's car insurance? If you have full coverage, it might be worth a call to the insurance company to tell them that this is what happened and would they please pay for it (after the deductible). Certainly worth a try.

2) There is a history of AC compressor mounting bracket failures, which have subsequently resulted in compressor issues and wiring damage. Presumably the dealer inspected this, but it may well be worth having a detailed physical look at this assembly including the wiring leading up to it. After disconnection, I would hope that the dealer adequately sealed the ends of the (disconnected) connectors to protect them from the elements. I don't have the wiring diagrams with me, but maybe someone can comment as I suspect the (very dangerous) high voltage wiring to the AC was probably left undisturbed.

3) Anyone have any ideas on how to troubleshoot the air compressor that is allegedly "shorted"?

4) Next, let's assume that the compressor itself is defective - inasmuch as your dealer wants over $4000 :!: :!: to replace this unit with a new one, perhaps we need to find you a used one? I wasn't able to find anything after a brief search on eBay, but, before searching the massive used car parts networks, does anyone have access to a parts car? I just visited with Ben Nelson in Minnesota yesterday (before I read this post) so will give him a call as to his thoughts about the state of that compressor on the hurricane Sandy salvage i-MiEV he just parted with (not too hopeful).

Welcome ideas anyone might have to help fix this problem, as next summer's life in New Orleans without AC is not pleasant to contemplate.
EVs: 2 Wht/Blu SE Prem., '13 Tesla MS85, 3 156v CorbinSparrows (2 Li-ion), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab 96
Hybrids: 48v1kW bike
ICE: '88 Isuzu Trooper. Mothballed: '67 Saab (orig.owner), '76 MBZ L206D RHD RV

Meowmiev
Posts: 2
Joined: Tue Sep 12, 2017 5:19 pm

Re: RBS light Alarm

Tue Sep 19, 2017 7:47 pm

Hello, thank you for your ideas and help.

We have been considering an insurance claim, and we have to make a decision before time runs out. My only reservation was that as a society our insurance premiums are determined to some extent by claims, and that a $4500 claim for an AC compressor is kind of overboard. However, my wife points out that the worth of the car is much diminished without AC - although we have no plans to sell it.

I will take a look at the AC compressor bracket and the disconnected wires, if I can find them. Definitely something that should not be left to chance, thank you for the suggestion. I will let you know what we find.

justoneman
Posts: 99
Joined: Sun Apr 09, 2017 6:09 pm

Re: RBS light Alarm

Mon Oct 30, 2017 9:03 pm

I now have this same problem with the A/C compressor. The car has been at the dealer for three days undergoing diagnostics and speaking with Mitsubishi support. The problem was determined to be a faulty A/C compressor. I chocked when I heard the part price of $3,000 before taxes and minus the installation and diagnostics costs. As I purchased the car for $4,500 I will not pay $4,000 for a repair. It would be foolish.

justoneman
Posts: 99
Joined: Sun Apr 09, 2017 6:09 pm

Re: RBS light Alarm

Tue Oct 31, 2017 7:11 pm

I have read one reference here in the forum from someone who has disconnected the A/C Compressor and that doing so rendered the vehicle drivable. Have more people done this as well? Is the AC unit not responsible for sometimes cooling the batteries or is it only in quick charge that this takes place?

justoneman
Posts: 99
Joined: Sun Apr 09, 2017 6:09 pm

Re: RBS light Alarm

Wed Nov 01, 2017 10:03 am

Do we understand how the A/C compressor was "disconnected"? Were the high voltage leads disconnected? Were just the control leads disconnected? Or was it both?

justoneman
Posts: 99
Joined: Sun Apr 09, 2017 6:09 pm

Re: RBS light Alarm

Wed Nov 01, 2017 12:48 pm

Today I discussed with the dealership, the idea of disconnecting the AC compressor. They stated they cannot do that as it gives them a liability of not doing the proper thing. I was not surprised.

Return to “General Technical Discussions”