Parasitic Draw '17 Mitsubishi Mirage

Christopher Technician Saskatchewan Posted   Latest   Edited  
Resolved
Electrical
2017 Mitsubishi Mirage ES 1.2L (J 3A92) (F1CJB)
Parasitic Draw

Wondering if there is any Mitsubishi guys out there that might know what is considered normal for parasitic draw on a 2017 Mitsubishi Mirage? 

Helping an elderly family member out, this car is virtually brand new with just over 16,000kms on it, and driven rarely but lately has been used on a more regular basis… that being said the customer complaint is that battery needs to be charged every 2-3days which to me is very excessive. It's been to the dealer a few times who have stated no problem found with all checking out normal, sold them a battery last year but nothing much ever really changed with same condition persisting…

I have done some basic checks with no obvious lights on or the like and done the lock down routine with an in-line vantage meter and come up with 114mA after 2hrs of sitting consistently. Disconnected and reattaching returning immediately to the 114-117mA.. There is an after market cruise switch that was installed at the dealer and if left on raises this to 176mA

The aftermarket cruise is obvious and should be on an ignition feed not a battery feed foresure, this will be addressed but question is…. Is 114-117mA too high? Too me this seems too high for a very basic vehicle such as this, but I am from the HD world and have not done a lot of modern cars for parasitic draw, so maybe this is normal?

Thinking maybe there is a Mitsubishi tech out there with the answer?

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Brandon Diagnostician
Arizona
Brandon
 

Generall stick to 50ma max draw

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Christopher Technician
Saskatchewan
Christopher
 

Aftermarket strikes again, and install error … Moving the cruise to an ignition feed has brought it down to 40mA. Battery passed carbon pile but failed conductance test. Dealer replaced battery at no cost and resolved the install error… All in all simple fix, glad to have it resolved before the cold weather hits.. Thanks for all the input, case closed …. I have attached the install document I…

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Louie Technician
New York
Louie
 

117ma is way too high try disconnecting the radio head unit and amp and retest for a draw should be in the low 50s like Brandon said.

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Christopher Technician
Saskatchewan
Christopher
   

Ok thanks for the input guys, good to get confirmation I was on the right track with that draw being too high. I plan to get in contact with my local dealer tomorrow where the vehicle was purchased before I start pulling fuses and taking panels off as the vehicle has been exclusively serviced there since new, I believe the car still has warranty coverage…Does anyone happen to know if the…

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Erik Diagnostician
Florida
Erik
 

I was working on a 2020 Camry and 2019 Lexus RX350 and tech assist was firm even for those module ridden vehicles that is still be a firm 50 mA as well. Obviously every vehicle is slightly different as well as battery Ah, weather, use etc but try to get your hands on a thermal imager let it sleep half the day if possible and start searching the car. I’d see about weather conditions or getting it…

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Christopher Technician
Saskatchewan
Christopher
   

Ok good to know, this car is very basic but if an LX350 is still around 50mA then that makes sense… I did the quick thermal imager trick but nothing stuck out.. Did the outside fuses and they were all zero .. will do some digging to see where they hide the ones inside and keep going tomorrow when get some time… I want to make sure on the warranty side before pulling any fuses and modules etc…

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Lee Owner/Technician
Michigan
Lee
 

youtube​.​com/watch?v=YrwnQB…

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Benjamin Owner/Technician
Georgia
Benjamin
   

Instead of pulling fuses you can go on Power probe’s website and print out fuse charts for mv drop testing across fuses. When you find the offending circuit go to your service data and look at power distribution. Find what all that fuse feeds and start process of elimination. Not sure how long it takes for Mitsubishi modules to sleep, but some brands can take a long time. It helps to find a way…

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Glenn Owner/Technician
Texas
Glenn
 

I concur with what others have said, usually 50 ma is the goal for max parasitic draw. This thing sounds like a module is staying awake. You suspect the aftermarket cruise? Disconnect everything associated with it. I suspect it is keeping the BCM or dash module awake in monitor mode.

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Jürgen Owner
Mexico
Jürgen
 

The 50mA rule has been the general rule, for decades. On newer vehicles, like your problem child, the idle current draw is supposed to be still smaller, many will be in the 20 to 30mA range.

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Jürgen Owner
Mexico
Jürgen
 

Another important thing: while testing mke sure no key is near on keyless entry/start systems.

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Interesting
David Owner/Technician
Arizona
David
 

I agree Jurgen, I had a customer with a 2010 Caddy that hung his Smart keys up on a peg on the garage wall next to the door into the house. I figured it out only after multiple attempts to locate a parasitic drain here at my shop.

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Rudy Technician
Utah
Rudy
 

Jurgen- Im curious why vehicles with more on-board electronics than in the past, should have a lower draw. Ive seen published draw specs in the last 10 years in the 70mA-80mA range. IMO 50mA is still a good rule of thumb….

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Jürgen Owner
Mexico
Jürgen
 

Rudy, my take on this is the following: The newer a vehicle the more electronic devices and electronic controls are built into it, contrary to electric devices on previous models. This change may account for a smaller current while at rest on newer vehicles. An example would be an analog clock where still physical work is done while moving the pointers. Another point that may assist in…

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Jose Diagnostician
Indiana
Jose
 

That amount of amperage is indicating some sort of module issue such as the navigation, cluster. I would say remove the fuse for the navigation/radio and watch the amp draw again. The voltage across fuses is what I use as well but dont be tricked into those that powers the fuse box because that one is tricky since there are many inputs before it decides to shut itself down. Rarely it is the…

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Gary Diagnostician
Australia
Gary
   

Like others have said, 20 - 50mA is the new norm for idle current draw; safe bet that Mitsubishi expects between them. Here is the link to the PowerProbe fuse voltage drop chart/s (very handy!): powerprobetek​.​com/wp-content/upl…​.​pdf I have personally experienced the effects of pulling fuses on modern vehicles, it doesn't work. It tends to cause modules to panic and wake up because they have…

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Christopher Technician
Saskatchewan
Christopher
 

Thanks to all who replied, glad to see consensus that the 50mA baseline is still around, disappointing to have this vehicle be at the dealer for multiple visits and not have this found, but I suspect as soon as soon as the tech seen the low mileage they assume vehicle is not monitored… I have generally seen around 20mA but wanted to make sure as I generally don't see vehicles this new... I have…

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Glenn Owner/Technician
Texas
Glenn
 

Hi Christopher, The ‘Dealer’ does not always employ or have the best trained people working for them. Currently, most dealers in my area have very high turnover rates.

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Christopher Technician
Saskatchewan
Christopher
 

Yes would like to just dig into this one and fix it but at this time I am just to verify the symptom, and confirm the draw was there as expected, this vehicle has quite a few years left of warranty on it and want to make sure that I don't do anything to disrupt that… I have finally got the vehicle into the dealer, explained my findings, including what appears to me to be a possible aftermarket…

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Phil Technician
Massachusetts
Phil
 

While I agree with everyone that 117ma is more than double what I would expect to see. I still don't think that necessarily accounts for “needing to be charged every 2-3 days”, especially if the vehicle is being driven on a somewhat regular basis which you state that it is. When you say it needs to be charged, does that mean the vehicle will not start? I see this has a puny engine and most…

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Mihail Technician
Maryland
Mihail
 

As others have said current should be under 50mA. Some new Bmw and Mercedes have rest current up to 80mA but they have powerful AGM batteries installed that can handle that. I would first fully charge the battery and then test it with a good battery tester that you trust. I would not be surprized if this battery is weak or not fully charged. Even 120mA rest current should not discharge a good…

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Steven Mechanic
Washington
Steven
 

If you have access to Identifix, there is a Tech Talk Article TT… that could help a little bit. By the way, the spec. for ignition off current draw from Mitsubishi is 50mA maximum.

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Joe Owner
California
Joe
 

This may help. When calculating the draw, use the battery information that is for the vehicle, not what is in the vehicle. The replacement battery may not be up to par. This is the information that I provide with the Parasitic Draw Test Switch that I sell.

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Jose Diagnostician
Indiana
Jose
 

What is this switch you speak of?

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Joe Owner
California
Joe
 

It is a switch that you can put in-line between the battery and negative battery cable of either a side terminal or top terminal batteries. It has pins that you can connect you DMM/DVOM to and measure battery drain current. It allows you to CLOSE the switch and operate the vehicle, And OPEN the switch when you need to check for battery drain. Search “Parasitic Draw Test Switch” on eBay. Mine…

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David Owner/Technician
Arizona
David
 

This is the switch I use, I have had it for decades. It's made by Wirth and works on both top and side post batteries.

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Christopher Technician
Saskatchewan
Christopher Resolution
 

Aftermarket strikes again, and install error … Moving the cruise to an ignition feed has brought it down to 40mA. Battery passed carbon pile but failed conductance test. Dealer replaced battery at no cost and resolved the install error… All in all simple fix, glad to have it resolved before the cold weather hits.. Thanks for all the input, case closed …. I have attached the install document I…

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