2012 Legacy Airbag Codes

Ric Owner/Technician Hooksett, New Hampshire Posted   Latest   Edited  
Question
Collision
Safety
2012 Subaru Legacy 2.5i 2.5L (EJ253) (TR690)—4S3BMBK69C3030143
Airbag Light On
Ee: Rh Comm Error
29: Ods Failure
Ac: Rf Door Sensor Misinstalled
Ea: Rh Comm Error

Hello all. I have this Subaru here that I need a little guidance on. This car is an auction car so little is known about it's history. 3 of these codes are referencing the right side circuits or sensors. After gaining access to all three right sensors, I checked all the wiring and connectors and found no faults. These sensors run in series to the module, so all three were replaced with new. Codes remain. Used car dealer provided a used module that changed nothing. I rechecked the wiring, including a pin drag test with the same results. Tried clearing codes with 2 different scanners to no avail. Powers and grounds to main module good.

Regarding the code 29, powers and grounds were good and wiring to main module good. A new ODS module is on order.

Vehicle does look like it was repainted on the right side. Looking for a little direction. My brain is turning to mush. 

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Bentley Manager
San Diego, California
Bentley
 

Make sure the door harness is correct, and none of the wire harness has been repaired. Good Luck!

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Ric Owner/Technician
Hooksett, New Hampshire
Ric
 

Thanks Bentley. The door harness looks OE; only two wires to the sensor. No other repairs that I can see.

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Leo Technician
Rhinebeck, New York
Leo
 

Hi Ric- you haven't included the actual code numbers in your post, but in looking over the wiring diagrams, I can guess which RH sensors you're referring to. Take a look at "Inspection locations after a collision" in service information. After any airbag activation (safer to assume there was one, than not) the airbag control module is at the top of every one of many large lists of items that

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Ric Owner/Technician
Hooksett, New Hampshire
Ric
 

Hi Leo, Those ARE the actual code 'numbers'! AC-EA-EE. ODS module is on order, not the main module. Used car dealer trying to save money got us a used one.

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Leo Technician
Rhinebeck, New York
Leo
 

Oops, sorry- you're right. The newer ones are all 4 digit B codes...

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Ric Owner/Technician
Hooksett, New Hampshire
Ric
 

I did a double take on them when I first saw them, too.

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Dmitriy Analyst
Toronto, Ontario
Dmitriy
 

This system is designed to be diagnosed easily... well, in theory, anyway. If someone melts two communication wires together (e.g., airbag sensor and ODS ones), all bets are off: diag​.​net/file/f3buwa19u… ​ [this is for a different, but similar, Subaru] This would be fun to diagnose! Also, it is helpful to double-check part numbers of all components -- they may be talking, but

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Ric Owner/Technician
Hooksett, New Hampshire
Ric
 

Update: A new SRS main module cleared all of the codes (including the ODS codes) except AC which is for the RF door sensor. Double checked with the dealer and it looks like we were provided with the wrong door sensor as there is a production break for the sedans. I will update again once the correct sensor arrives. Thanks everyone for their input.

+2 Ð Bounty Awarded
Ric Owner/Technician
Hooksett, New Hampshire
Ric
 

Final follow up: After installing the correct door sensor, all codes are gone and the light is off. Thank you to those who replied.

+1 Ð Bounty Awarded
Dmitriy Analyst
Toronto, Ontario
Dmitriy
 

Ric, thank you very much for the update and conclusion. It is exciting to see how the real-world diagnosis for this system goes versus the flowchart.

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