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Old 08-26-2019, 06:03 AM   #1
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Rebuilding a 2010 SE airbag question

Recently bought a 2010 SE w/ 49k miles in otherwise excellent shape. The rear was involved in an impact ABOVE the rear bumper from what was probably a truck or SUV. Trunk deck/lid/rear panel were pressed in but not ripped; EDIT can't post links to images yet so have to use your imagination.

So, bumper bar folded slightly upwards as the rearmost trunk panel pressed in a bit. NO airbag deployment. Airbag lights go out after starting (as do all other lights) and it was sold direct from the insurance, so unlikely anything was monkeyed with beforehand, other than tail lights and bumper cover pulled but original shop doing estimates.

Before I start pulling everything back out, I was concerned about any possible sensors that might be in the rear that affect the airbag system. Mainly, does this year have one, and could it inadvertently trip up a sensor into thinking there was an impact while trying to pull the rear panel back out? If so, should it be disconnected? Does disconnecting the battery do enough? Or would the sensor need completely unhooked?

The impact was enough that the lower tail light panel needs brought back out into rearmost alignment, as does the rear trunk skin so trunk latch can grab the striker, and part of the rear skin the bumper bolts to needs pulled out and down. I have a replacement bumper cover and bumper w/ brackets, trunk, and lights, just need to know how to avoid tripping up the SRS (if that's even possible to agitate it) while pulling the rear skin out.

Will probably use come-a-longs with a custom jig mounted to pull rear panel rearward or at least keep a good amount of pretension on it, then use a bottle jack on it's side in some sort of jig to manually push trouble areas back little bit at a time while keeping pretension on everything.

Hope that makes sense. Wall of text was added to avoid excess questions. Can't add pics atm as account is new. Car is in excellent shape w/o rust and was taken care of. I plan on keeping it awhile. Seems worth the effort to correct.


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Old 09-01-2019, 09:15 PM   #2
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Does anyone know if a 2010 SE 4 door has an impact sensor in the rear of the car? Would like to pull everything out but need to know what, if anything needs disconnected beforehand. And if there's a method to actually disable the SRS system so it can be worked on, what's the procedure?
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Old 09-02-2019, 09:31 AM   #3
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2010 Focus:

Depowering Procedure

WARNING: Never probe the electrical connectors on air bag, Safety Canopy(R) or side air curtain modules. Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

WARNING: Never disassemble or tamper with safety belt buckle/retractor pretensioners or adaptive load limiting retractors or probe the electrical connectors. Failure to follow this instruction may result in the accidental deployment of the safety belt pretensioners or adaptive load limiting retractors which increases the risk of serious personal injury or death.

WARNING: To reduce the risk of accidental deployment, do not use any memory saver devices. Failure to follow this instruction may result in serious personal injury or death.

NOTE: The air bag warning indicator illuminates when the correct Restraints Control Module (RCM) fuse is removed and the ignition is ON.

NOTE: The Supplemental Restraint System (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.

Turn all vehicle accessories OFF.
Turn the ignition OFF.
At the Smart Junction Box (SJB), located below the LH side of the instrument panel, remove the cover and the RCM fuse 32 (10A) from the SJB. For additional information, refer to the Wiring Diagrams. See: Diagrams\Electrical\Diagrams By Number
Turn the ignition ON and visually monitor the air bag indicator for at least 30 seconds. The air bag indicator will remain lit continuously (no flashing) if the correct RCM fuse has been removed. If the air bag warning indicator does not remain lit continuously, remove the correct RCM fuse before proceeding.
Turn the ignition OFF.
WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.

Disconnect the battery ground cable and wait at least one minute.
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Old 09-04-2019, 06:03 PM   #4
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Thanks for that AandPDan. When reconnecting, is there a specific routine to follow?
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Old 09-04-2019, 07:35 PM   #5
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Repowering:

Repowering Procedure

Turn the ignition from OFF to ON.
Install the RCM fuse 32 (10A) to the SJB and install the cover.
WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any air bag module when the battery is connected. Failure to follow these instructions may result in serious personal injury in the event of an accidental deployment.

Connect the battery ground cable.

Prove out the SRS as follows: Turn the ignition from ON to OFF. Wait 10 seconds, then turn the ignition back to ON and visually monitor the air bag warning indicator with the air bag modules installed. The air bag warning indicator will light continuously for approximately 6 seconds and then turn off. If an air bag SRS fault is present, the air bag warning indicator will:

- fail to light.
- remain lit continuously.
- flash at a 5 Hz rate (RCM not configured).
The air bag warning indicator may not illuminate until approximately 30 seconds after the ignition has been turned from the OFF to the ON position. This is the time required for the RCM to complete the testing of the SRS. If the air bag warning indicator is inoperative and a SRS fault exists, a chime will sound in a pattern of 5 sets of 5 beeps. If this occurs, the air bag warning indicator and any SRS fault discovered must be diagnosed and repaired.
Clear all continuous DTCs from the RCM and Occupant Classification System Module (OCSM) using a scan tool.
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Old Yesterday, 10:15 AM   #6
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Thank you again for this!
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