[Warning Light] Airbags - Loom wiring fault fixed - Printable Version +- Berlingo Forum (https://www.berlingoforum.com) +-- Forum: Specific Model Chat, Problems and Faults (https://www.berlingoforum.com/forum-8.html) +--- Forum: M59 Berlingo (https://www.berlingoforum.com/forum-28.html) +--- Thread: [Warning Light] Airbags - Loom wiring fault fixed (/thread-16035.html) |
Airbags - Loom wiring fault fixed - BerlingoBoyo - 30-08-2017 BERLINGO VP (M59) FOURGONNETTE FAMILIALE 1.9 D 71 (DW8B) BVM 5 After a recent master cylinder replacement my airbag light came on - is there a clue here? The mechanic said coincidence and checked the under seat airbag wiring. And pronounced all well. I thought I would check and take a picture. This image is of the wiring under the driver's seat, the passenger seat only has the brown wiring. I had to cut the 4mm cable ties to free up the wiring enough to get it out. Cleaned and re-joined firmly - light still on. [Image: Berlingo-airbag-underseat-connectors.jpg] The scanner says - 0F40 VAN network 140F40 006F Passengers airbag Inhibition 14006F This doesn't seem to be a common code, though I have read a thread that pointed to a wiring fault between the BSI and the airbag circuitry. The BSI is easy to find - it's below the steering wheel behind a panel that just pulls off. I took another photo. [Image: Berlingo-BSI-location.jpg] I'm not sure what to do next - I have read that the airbag ecu is under the gear stick shroud - should I try to test the connections between the two for continuity? How easy is it to get the BSI out ? OR I have read somewhere about a harness near the air intake that rubs through. I have also had lots of issues with the blower motor - might the problem be in that area? ta like. BB RE: Airbags - The Song Remains the Same - BerlingoBoyo - 01-09-2017 I'm following this post - https://www.berlingoforum.com/thread-3860.html?highlight=airbag+light And began by checking EP1 in the engine bay fuse box - picture below [Image: Berlingo-Engine-Bay-fuse-box-EP1-connector.jpg] I could see no rust or damage. I'm following this post on the thread above from Rustcrat - Berlingo King! ----------------------------------------------- Just been having another play and found out that your air bag fault translates to this - "There is a fault on the Van network. The passengers air bag has been deactivated." So I think the fault lies with the Comms to the engine fuse box (Bsf) on your "data" wire (9012 red, pin 1 EP1(10v NR) Bsf, pin 6 EP(40v NR) Bsi). Confusedalut: .pdf dw10 air bags.pdf (Size: 162.85 KB / Downloads: 186) ------------------------------------------------- My photos struggle to capture cable colour but will try again and post a better shot. One note on the - I am no wiring diagram expert but - on the wiring diagram attached by RustCart - the fusebox seems to be labelled PSF1 rather than BSF1, or maybe my printer is slacking. BB RE: Airbags - The Song Remains the Same - BerlingoBoyo - 01-09-2017 Identifying the data wire at EP1 - the socket in the fuse box has helpfully got the pins numbered and sure enough one of the red wires goes to pin one - photo below [Image: Berlingo-Engine-Bay-fuse-box-EP1_Pin1.jpg] Now to the other end the BSI under the steering wheel. Rotate the white latches 90 degrees and you can 'drop' the BSI - there is some slack in the cables so it will come forward a little. The connectors look like this Two big bad boys on the left [Image: Berlingo_BSI_connectors_row1_Left.jpg] And two smaller ones on the right [Image: Berlingo_BSI_connectors_row1_Right_2.jpg] I removed the far right connector first then the adjacent one. I found the far left one the next easiest - push the red tab at the far end away from you. but the middle one is tricky - you need to press the yellow tabs at the top to free the red tab to move right - however I can't get enough leverage to release it, or I'm doing something wrong! [img] http://www.ppm6.tv/wp-content/uploads/2017/09/Berlingo_BSI_connectors_row1_tricky.jpg[/img] RE: Airbags - The Song Remains the Same - BerlingoBoyo - 01-09-2017 I think I'm following Multispacer with a similar airbag problem https://www.berlingoforum.com/thread-11787.html?highlight=airbag With much squeezing of yellow tabs and swearing I managed to free the middle connector allowing me to pull out the BSI a bit more and access the connectors behind. Three connectors with lever retaining clips - release by depressing the button that holds the lever in place. Left two shown below. [Image: Berlingo_BSI_connectors_row2_left.jpg] The one we want is on the left hand side - it is black. [Image: Berlingo-BSI-EP-connector.jpg] Labelled noir on the socket of the BSI itself. Looking at the face of the connector we want to check pin 6 for continuity through to pin 1 on the EP1 connector at the engine bay fuse box. [img] http://www.ppm6.tv/wp-content/uploads/2017/09/Berlingo_BSI_connectors_EP_face.jpg[/img] Bummer - the wiring here is fine. 9012 red, pin 1 EP1(10v NR) Bsf to pin 6 EP(40v NR) BSI There is a second white wire which seems to be pin 2 EP1 white to pin? EP at BSI there's a mention that the pin at the EP is pin 8 There's no continuity between 2 at EP1 and 8 at EP but logically it would be 7 wouldn't it? More digging required RE: Airbags - The Song Remains the Same - BerlingoBoyo - 01-09-2017 Should have read the wiring diagram more closely 9013 runs from Pin 5 on EP1 to pin 8 on the BSI No connection when measured. Looks like the fault is found, maybe... RE: Airbags - The Song Remains the Same - BerlingoBoyo - 02-09-2017 Hoorah! [Image: Berlingo-no-airbag-light.jpg] In the footsteps of Multispacer - I removed the wipers and the rain scuttle and then pulled the red and white wires that are twisted together (thank goodness!) out of the loom wrap. I was too nervous to go straight to a cut and being needleless I used a scalpel blade with a croc clip attached to cut to the conductor in the white wire without making a break in the wire. Good continuity from here forward to the BSI and no connection back to the fusebox. The break is in the engine compartment somewhere. I didn't seriously consider trying to follow the loom - it runs behind the washer motor plate and then plunges into inaccessible stygian gloom before reappearing somewhere in the near corner by the fusebox. Instead I cut the white cable in the scuttle and at the fuse box and ran a bypass (pics below) and joy of joys the light goes out. The light goes out! [Image: Berlingo-9013-bypass-scuttlle.jpg] And at the fusebox end - [Image: Berlingo-9013-bypass-fusebox.jpg] A note - I broke one arm of the yellow tab on the connector at the BSI - it seems you lift the yellow tab to allow the red sliding lock to remove (or repconnect) the plug. If under strain you move the red lock 'out of range' - as I did - you will struggle to get it back in without snapping one of the yellow arms. Take care. Mind you I haven't got the BSI back into its slot yet - just happy with airbag light free driving. RE: Airbags - Loom wiring fault fixed - Tomcat3 - 02-09-2017 Glad you got it sorted in the end and your thread will no doubt help others with this problem. |