Parking Break malfunction and Airbag light

[jlaudio]

Car is a B8 '10 S4:

Over the weekend I was driving down the highway when my car dash beeped and i recieved both a Parking Brake malfunction and Airbag warning light. I was able to scan and clear the codes, scan showed as a short on the drivers side seatbelt latch (short to ground) and occupancy sensor malfunction (intermitten) in the seat bottom.

Searching the interwebz i find that it seems to be a common issue. The audizine, AR, and other audi related formums indicate its one of a few things:

- The plug underneath the seat that plugs into the occupancy sensor
- Code indicates that the safety belt latch has a short (could be related to occupancy sensor?)
- seat occupancy sensor/airbag not working ($1100 part)
- airbag control module ($1100 part)
this one threw me a bit:
- MAF sensor malfunction?? (car does have an odd idle sometimes) $450-600 dollar part

I can post detailed scan's later when i am home.

Has anyone ever experienced this? What was the fix? I have an appointment for friday but i'm nervous about the out of pocket expenses i may incur here. Car is out of warranty, 57k miles. Any thoughts?


oh my i just realized i used break instead of brake in the title of this thread. i swear i'm not new here!!!

[chaos2984]

well for the seat belt buckle. Does it plug into the occupancy sensor/module. Or does it have its own harness and connector that connects to the cars harness. I would unplug the seat belt buckle sensor and see if you get another code and the short to ground goes away. You should get an open code. If that happens the buckle switch is bad. As far as the occupancy sensor. I would disconnect and reconnect the harness connector a few times and clear the codes and see if it comes back. Airbag wiring is super sensitive, the resistance matters down to .x of an ohm. most of the time airbag codes are unwanted resistance in the connectors of the system.

[jlaudio]

well for the seat belt buckle. Does it plug into the occupancy sensor/module. Or does it have its own harness and connector that connects to the cars harness. I would unplug the seat belt buckle sensor and see if you get another code and the short to ground goes away. You should get an open code. If that happens the buckle switch is bad. As far as the occupancy sensor. I would disconnect and reconnect the harness connector a few times and clear the codes and see if it comes back. Airbag wiring is super sensitive, the resistance matters down to .x of an ohm. most of the time airbag codes are unwanted resistance in the connectors of the system.

good points, i'll try disconnecting the seatbelt buckle and plug underneath the seat for the occupancy sensor and see if it triggers any open circut codes. i always knew airbag wiring was sensitive, i just hope i'm not walking into a massive headache here.

[jamesj2k]

Do you have any mods...control arms can cause a problem if they damage the wires in the wheel well. (happened to me)

[jlaudio]

Do you have any mods...control arms can cause a problem if they damage the wires in the wheel well. (happened to me)

I had the Alu Kruez installed about a week prior to this happening.

related?

[Justin_duhhh]

had this happen when i disconnected the emergency flashers for a gauge install

[Ryan_qttro]

Parking brake warning comes on with Airbag warning just to get your attention, Since the parking brake warning is louder and flashes at your. Alu Kruez install should not have caused EPB warning.

[jamesj2k]

Also had ALU kreuz. Should be unrelated. Check the wires above the wheel well. I had the same errors when my control arms chewed through the wires. Hmm

Also what were the codes?

[jlaudio]

Codes from the scans:

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104)       Labels: 8K0-907-379.clb
   Part No SW: 8K0 907 379 CA    HW: 8K0 907 379 CA
   Component: ESP8 quattro  H04 0010  
   Revision: --------    Serial number: --------------
   Coding: 280D1A
   Shop #: WSC 06325 000 00000
   VCID: 7AF1B3E0F55D25F121F-802F

1 Fault Found:
00473 - Control Module for Elect. Park/Hand Brake (J540) 
            013 - Check DTC Memory
             Freeze Frame:
                    Fault Status: 01101101
                    Fault Priority: 6
                    Fault Frequency: 1
                    Reset counter: 185
                    Mileage: 94161 km
                    Time Indication: 0
                    Date: 2015.02.11
                    Time: 17:51:56

             Freeze Frame:
                    Hex Value: 0x00C0
                    Hex Value: 0x4006
                    Hex Value: 0x1232
                    Hex Value: 0x02B8
                    Hex Value: 0x00FF

-------------------------------------------------------------------------------
Address 15: Airbags (J234)       Labels: 8K0-959-655.clb
   Part No SW: 8K0 959 655 H    HW: 8K0 959 655 H
   Component: AirbagVW-AU10 H39 0560  
   Serial number: 003EGD055HRE  
   Coding: 303836354230303030304A55304C384B3053
   Shop #: WSC 06325 000 00000
   ASAM Dataset: EV_AirbaECUVWAUDI010 003010
   ROD: EV_AirbaECUVWAUDI010_AU48.rod
   VCID: 42810B00D50DAD3139F-8017

   Seat occupied recognition: 
   Subsystem 1 - Part No SW: 8K0 959 339 B    HW: 8K0 959 339 B
   Component: BF-Gewichtss.  H01 0030 
   Serial number: 5810000R0900003SSH

   Crash sensor for side airbag; driver side: 
   Serial number: 6334MSME4A523468F

   Crash sensor for side airbag; front passenger side: 
   Serial number: 6344MSME4C2406169

   Crash sensor for side airbag; rear; driver side: 
   Serial number: 6352QSME753F5124J

   Crash sensor for side airbag; rear; passenger side: 
   Serial number: 6362QSME2341143C8

   Crash sensor for front airbag; driver side: 
   Serial number: 63732SME6A414D22+

   Crash sensor for front airbag; front passenger side: 
   Serial number: 63832SME03422D10P

1 Fault Found:
9444369 - Safety belt switch - driver side 
             B101C 11 [136] - Short to Ground
          MIL ON - Intermittent - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 94161 km
                    Date: 2015.02.11
                    Time: 17:51:55

-------------------------------------------------------------------------------
Address 53: Parking Brake (J540)       Labels: 8K0-907-801-V1.clb
   Part No SW: 8K0 907 801 H    HW: 8K0 907 801 H
   Component: EPB Audi B8   H09 0100  
   Revision: 00000003    Serial number: 00000000488351
   Shop #: WSC 00000 000 00000
   VCID: 346D5DD897B91381BB3-8061

1 Fault Found:
01321 - Control Module for Airbags (J234) 
            013 - Check DTC Memory - MIL ON
             Freeze Frame:
                    Fault Status: 11101101
                    Fault Priority: 4
                    Fault Frequency: 1
                    Reset counter: 182
                    Mileage: 94161 km
                    Time Indication: 0
                    Date: 2015.02.11
                    Time: 17:51:56

             Freeze Frame:
                    Voltage: 14.80 V
                    Count: 80
                    Speed: 0.0 km/h
                    Hex Value: 0x02E0
                    Hex Value: 0x0001
                    Hex Value: 0x0101

I'll have them check the wheel well wiring on Friday once it goes in.
I also had a airbag occupancy sensor code in a previous scan after clearing it once, i'll try to look for that also.

[saxon]

anything safety related should still be under warranty for you as long as you didnt modify the said parts

[jlaudio]

anything safety related should still be under warranty for you as long as you didnt modify the said parts

no modifications to anything safety related.

car went in this morning, they seem to think i have a CPO warranty. the car did have the warranty but i was unable to transfer it, so we will see what happens. I did get a nice '15 A6 TDI S-Line Loaner. Wow... i really like and am impressed with the TDI, its rather quick.

[jlaudio]

Update: Dealer called and indicates that the drivers side seatbelt latch needs to be replaced. $340 parts and labor. I called AOA to see if they would good will it. I guess i have the A6 TDI for the weekend, things could be worse.
He also indicated the battery is bad, $405 parts and labor to replace. I think i'll just buy it aftermarket and code the battery in with my own Vag Com. Save the $150.

[Works2shoot]

He also indicated the battery is bad, $405 parts and labor to replace. I think i'll just buy it aftermarket and code the battery in with my own Vag Com. Save the $150.

Coding a battery? I know I can google it but figured I'd ask since you seem to know. Thanks!

[jlaudio]

Coding a battery? I know I can google it but figured I'd ask since you seem to know. Thanks!

http://wiki.ross-tech.com/wiki/index...ry_Replacement

same procedure as the A8
our cars have a separate battery control module so you have to code the battery serial number into the module with a ross tech cable

[bombdiggity]

My car (B8 S4 with DSG) just got hit tonight on the passenger side engine and wheel area, when some jackass ran a red light. My airbag light and parking light are on now. Car got towed.

His airbags went off since he T boned me. Mine didn't. Wondered if it was a faulty airbag. Now I need to find a thorough body shop.