Hey Guest, welcome to ChevyBolt.org. We encourage you to register to engage in conversations about your Bolt.

2019 Bolt Manual Service Disconnect failure

5497 Views 6 Replies 4 Participants Last post by doornumber3, Jul 18, 2020

doornumber3

Discussion Starter · Jun 5, 2020

2019 Bolt (purchased July 2019, now with 4000 miles - not sure the build date) suffered complete propulsion failure last Monday evening (June 1, 2020) at 55% battery capacity while rounding a gentle curve at 40mph in L. Tones started ringing, the drive pedal went soft, steering went stiff, mileage estimates dropped instantly to zero, and the Service Vehicle Light came on. (Ironic that this indicator looks like a car with a giant nail pounded through it!)

I was able to coast to the side of the road. "Conditions not correct for shift" and other fun messages. Called OnStar for a tow.

Today, the dealer says the technician has had help from GM to determine that the Manual Service Disconnect was faulty and needed to be replaced. Sadly, the part is backordered. I read in other posts that the part is made in China so these days maybe it will be a long wait. They will give me a loaner vehicle in the meantime.

I am not too much of a car guy so I'm trying to follow the other posts on the topic and will make an entry into the NTSC database as recommended.

Any other advice for me? Any questions I should ask the dealer to make sure they've done a thorough investigation?

Thanks in advance.

PS: We love our Bolt. It is a real gem of a vehicle, we think. Quiet, clean, smooth, fun, nimble, cheap-to-operate, cheap-to-insure (for now). Our 2012 Town & Country (also a great car, in truth, for the days when we still had kids at home) now seems barbaric by comparison. Unless future experience with this Bolt goes sour, I doubt I will buy a gas-powered car again.

See less See more

Save

1 - 7 of 7 Posts

XJ12

· #2 · Jun 5, 2020

doornumber3 said:
Any other advice for me?

Thanks for sharing. Seems to have happened to a few on this forum.

2017 Bolt EV Service Disconnect Fuse Bulletin?

Hello, A question for the forum: Have any Bolt EV drivers been notified of a Service Disconnect Fuse bulletin by their dealer? I recently took my Bolt EV to the dealer for a routine service check (courtesy tire rotation, wiper replacement, cabin filter) and the dealer said they would need...

www.chevybolt.org

Save

Poway Bob

· #3 · Jun 13, 2020

MSD is a good guess. Most are being replaced in S. Korea. Same event on my 2019. First replace APU used to charge the 12v battery. Makes sense, nope, car still dies. Next, they say the transmission. A rare problem but washer on spider gear was damaged. Metal got in the transmission fluid, stator of EV motor sees a ground fault (short) to rotor and shut itself down. I now have a new APU and new transmission at 17k miles. Chevy, I really would like to see the failure analysis report so that if this was an operator error, I do not want to cause the same problem again!

Note: Dealer said car would start back up a short while later because the heavy metal would drop back to the bottom of fluid reservoir. Question here is why the transmission filter or the magnet in the transmission did not catch the metal debris??

Love my Bolt!

See less See more

Save

doornumber3

Discussion Starter · #4 · Jun 13, 2020

Update: The car is back with us from the dealer. I was afraid the part would be backordered for weeks or longer due to the economic situation, especially with China, and especially since the dealer could not provide any further ETA on when the part would be available, but the new MSD showed up last week, was rapidly installed, and the car is back to full working order. All in all, disappointing that it happened, but its not hard to understand that if the fuse to the battery pack is not functional, the car is going to die. Chevy and the dealer both did a good job with the problem.

Save

Reactions: 4

GJETSON

· #5 · Jun 13, 2020

Poway Bob said:
First replace APU used to charge the 12v battery. Makes sense, nope, car still dies. Next, they say the transmission. A rare problem but washer on spider gear was damaged. Metal got in the transmission fluid, stator of EV motor sees a ground fault (short) to rotor and shut itself down. I now have a new APU and new transmission at 17k miles. Chevy, I really would like to see the failure analysis report so that if this was an operator error, I do not want to cause the same problem again!

Note: Dealer said car would start back up a short while later because the heavy metal would drop back to the bottom of fluid reservoir. Question here is why the transmission filter or the magnet in the transmission did not catch the metal debris??

This is the first I have heard of this problem. Thanks for posting. I too am puzzled as to why the the filter or magnet didn't catch it. Please keep us posted on any further developments.

Save

doornumber3

Discussion Starter · #6 · Jun 26, 2020

Update: For the record, the repair invoice I received when I got my Bolt back from the dealer after the MSD replacement listed the following codes as scanned by the technician during diagnosis: P0ABC, P0AFA, P1AE6, P0C78, P0ABB, or P0D26 referring to bulletin #18-na-225. The invoice further says that these codes and the bulletin pointed to an MSD malfunction. "Upon test found manual disconnect mage fuse open" was the result. The part installed was 24294004.

Save

Reactions: 2