Instrument Cluster swap (USED) in 2009 Mazda 3

Shane Owner/Technician Alberta Posted   Latest  
Resolved
Driveability
Electrical
2009 Mazda 3 GS 2.0L (G) 4-spd
Door Ajar Light Always On
Car Wont Start

Hi guys,

This car came in from a curber lot. Door open light is always on on the dash. Tech determined the issue was with the trunk latch unit as Autel showed all 4 doors properly open/closed but showed trunk always open. Disconnecting the latch/switch at the truck and jumping it made no difference. He tried an used electrical junction box after tracing the wires there. Still no fix. Finally he followed a test plan which led him to the instrument cluster being at fault. 

We got a used cluster and installed it, and the door open light isn't on, as a matter of fact it doesn't come on when the doors are open. That would be a good enough solution, except the car doesn't start with the used cluster. He's used the Autel to code/program it to the car, but we still get immo DTC's. 

We don't do a lot of these vehicles, is there another procedure we're able to perform to have the new IC play nice with the vehicle? Or has anyone experienced the door open light issue and have a better idea to fix that and reuse the original IC?

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Paul Owner/Technician
California
Paul
 

What's a curber lot? Mazda says to register keys after replacing the cluster with a new part. The “new” may be important, but I don't know that for a fact. However, if you aren't able to register the keys, or you can register keys but the car still won't start, that may be your issue. It's likely that the cluster and the ECM share a security code, and a new cluster would likely come ready to…

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Helpful
Interesting
Shane Owner/Technician
Alberta
Shane
 

A “Curber” is a term for used car flipper. Guys buy them at an auction and want them fixed as cheaply as possible so they can sell them and maximize their profits. Not sure where the term originated. Thanks for the info and examples, very interesting stuff, altho I hope I don't have to go that involved. I just connected our Autel and ran a scan… I found a code B1320 - LF door ajar circuit open…

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Tony Owner/Technician
Missouri
Tony
   

I don't know if Mazda BCMs treat body switches the same way but I have run into other makes that will code for, let's say, a LF door open - because the tech has the door open when pulling codes. It goes away immediately once the door switch reads “closed”.

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Paul Owner/Technician
California
Paul
 

Cool. I've learned some Canadian :) Starting from the beginning is often best. A lot of times I find myself nodding politely as a tech explains all of their tests and results as they're passing the torch. I'm often silently wishing they'd stop talking so I can start thinking and working because I'm planning to completely ignore all their work so far. I'm going to start with no assumptions. But…

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Paul Mechanic
Illinois
Paul
 

My understanding of curbing comes from dealers that take trade ins, but don't want them on their lots. Rather then send them to the auction, they park them on curbs/corners in their neighborhood with a for sale sign on them, making them look like a by owner deal. It's also illegal here in Illinois.

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Dmitriy Analyst
Ontario
Dmitriy
 

Paul, regarding your Subaru link, are you still interested in figuring out how the odometer value gets stored in the EEPROM, or you’ve already found out?

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Jason Owner/Technician
Virginia
Jason
   

I haven't done much with Subaru but that image in article, the location looks to be found easy enough in 1A0 & 1B0 I'd wager mileage is FE FF with checksum 01 00. Its really hard to know with virgin files tho they are a bit odd.

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Paul Owner/Technician
California
Paul
 

I’m able to program it with the AutoProPad, but I would absolutely like to know how it works. I love stuff like that.

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Dmitriy Analyst
Ontario
Dmitriy
 

I’ll try to put something together. It’s an interesting case for quite a few reasons.

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Paul Owner/Technician
California
Paul
 

Thanks!

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Andrew Mechanic
Michigan
Andrew
 

Paul those are some great articles I really enjoyed them! We need more techs like yo.

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Paul Owner/Technician
California
Paul
 

Thanks :)

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Jason Owner/Technician
Virginia
Jason
 

Eeprom is the easiest and BEST way to get this job done. Cloning the memory from eeprom will transfer VIN, Miles & PATS data. If your changing with same part number then direct cloning is fine. If different part number then its best to just edit in vin, pats and miles leaving the rest untouched.

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Dwight Owner/Technician
California
Dwight
 

First, you will need 2 keys. No clones. Second, you will need a scanner capable of doing Mazda PATS, in-out codes. The scanner will give you a code. Visit Mazda's website, pay $35.00 for the out code. Do not turn the key off while waiting for the code. Code changes with every cycle of the key. Or, DL this update software, it has a build in code generator, and it's free…

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Shane Owner/Technician
Alberta
Shane Resolution
 

Forgot to close this out.. Ended up being a fuse in the under hood box, labelled “Room” i think. 2 techs missed this and went down a wormhole chasing such a simple fix. Hopefully this saves someone else a headache in the future.

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