2019 CX-9 GT, 1.9A parasitic draw, fuse found, next steps?

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Jan 7, 2025 | 10:58 AM

#11

Callisto

Senior Member

Joined: Oct 2018

Posts: 10,612

Likes: 230

From: Northern California

Quote:

Originally Posted by ramahon

Unfortunately, Mazda claims they were unable to replicate. They had it for 5-6 days. Car hasn’t given us issues in since. The only thing that we were guilty of was leaving the fob in the car when in the garage. Although, during testing I did remove it.

My only thought is that my original battery was actually bad and the weak battery was unable to fully put things to sleep? (I’m having to convince myself of this).

Interesting? I will need to think about this?
While on a weekend trip I always carry my back up key fob. Generally, it goes in the hotel room with me. This last time I left it in the Mazda. The next thing I heard was my low battery alarm sounding off after an hour walking on the beach. I have AAA. LOL I babysat the battery for the next several hours. I always take my scanner with me on trips. No voltage drops. I did remove the spare key fob from the car? I may have to duplicate the situation and see what happens?
I will say that my key fob is connected to an aftermarket security system so a little different that OEM. It also has a couple of not so common features.

For other reading this YES I know that there are dozens of www informational about this however no technical information that when I looked has a ASE or Automotive Engineer, even an Automotive Electrical Engineer or the like authoring them? .... YET!

Last edited by Callisto; Jan 7, 2025 at 11:06 AM.

Jan 7, 2025 | 11:05 AM

#12

ramahon

Thread Starter

Junior Member

Joined: Dec 2024

Posts: 7

Likes: 0

From: Phoenix

Quote:

Originally Posted by Callisto

Interesting? I will need to think about this?
While on a weekend trip I always carry my back up key fob. Generally, it goes in the hotel room with me. This last time I left it in the Mazda. The next thing I heard was my low battery alarm sounding off after an hour walking on the beach. I have AAA. LOL I babysat the battery for the next several hours. I always take my scanner with me on trips. No voltage drop. I did remove the spare key fob from the car? I may have to duplicate the situation and see what happens?

Yeah, odd one. Reflecting, we've always been guilty of leaving the fob in the car on occasion but have been much more persistent in the last month or two. So i'm guessing it was the combination of a bad battery + leaving the fob.