69511900 Removing and installing airbag sensor
WM 695119 Removing and installing airbag sensor
Tools
Technical values
Preliminary work
Preliminary work for front airbag sensor
1. Disconnect battery. => Work instructions after disconnecting the battery
2. Remove front apron. => 631519 Removing and installing front apron - section on "Removing"
Preliminary work for centre airbag sensor
1. Disconnect battery. => Work instructions after disconnecting the battery
2. Remove front seat. => Removing and installing front seat
3. Remove the rear side-panel lining. => 707519 Removing and installing rear side-panel lining
4. Remove sill. => 680519 Removing and installing inner sill
5. Undo screw fastening seat belt to the body. => 691119 Removing and installing front three-point belt - removing
General warning notes
Safety instructions for airbag sensor
WARNING
Incorrect handling of airbag units
- Triggering of airbag unit
- System faults can occur
-> Switch off ignition and remove ignition key or remote control (hand-held transmitter).
-> A voltage supply (e.g. battery charger) must not be connected to the external power supply/jump-lead starting terminals.
-> Disconnect the battery and insulate the ground strap so that all contact with a ground carrier is avoided.
-> Wait 1 minute after disconnecting the battery.
-> Only detach connector on the triggering unit after the waiting time has elapsed.
-> Make sure that no foreign objects are located in front of the airbag unit during installation.
-> Replace damaged parts during removal.
-> Always position airbag units so that the blow-out opening is facing upwards, e.g. crest on driver's airbag.
-> Do not position anything on the airbag units.
-> If removed for an extended period, the airbag units must be stored in a safe place.
-> Airbag units must not come into contact with grease, oil, detergents, liquids, or similar substances.
-> Do not expose airbag units to temperatures above 90°.
-> Do not remove the short-circuit spring on the plug-in contacts.
-> Ignition and preparations may only be carried out by skilled staff, supervised by a second responsible person.
-> Before disposal, the airbag unit must be rendered harmless by electrical ignition performed in accordance with all precautionary measures, thereby preventing it from being used incorrectly.
Tools and materials
Tools
Disassembly tool, universal Nr.21
Removing airbag sensor
Removing sensor for front airbag
Installation locations
1. Unlock electrical connector -1- -A- and remove from sensor.
Disconnecting plug connection
2. Unscrew the two fastening nuts -2- and remove the sensor.
Mounting for removal of sensor
Removing sensor for centre airbag
1. Disengage floor covering at the support and lay it in the vehicle interior.
2. Unlock locating peg -1- using the removal tool
Unlocking locating peg using the removal tool
3. Unscrew fastening screws -2- and nuts -3- and carefully pull the support up and out of the retaining points.
Removing support
Incorrect triggering of airbag modules. => 695119 Removing and installing airbag sensor - general warnings
4. Unscrew the two fastening nuts -2-.
Removing airbag sensor
5. Unlock electrical connector -A- and remove sensor.
Removing connector for airbag sensor
Installing airbag sensor
Installing sensor for front airbag
Information
If a new component (e.g. sensor, airbag control unit, airbag unit) of the airbag system has to be installed, the new component will be supplied with a barcode sticker (tear-off label).
Sample tear-off label shown >> airbag sensor
- Tear off the tear-off label -2- on the new component -1- and stick it under the heading Proof of airbag system check/component replacement in the Guarantee and Maintenance booklet.
Tear-off label
- The replacement date and mileage must be documented and the booklet must be stamped with the dealer's stamp.
1. Position sensor on retaining bracket and screw it down with the fastening nuts -2-. => M6: 8 Nm (6 ftlb.)+/-1 Nm (+/-0.5 ftlb.)
Mounting for installation of sensor
2. Push on the electric connector -1- and lock it.
Installing sensor plug connection
Installing sensor for centre airbag
Incorrect triggering of airbag modules. => 695119 Removing and installing airbag sensor - General warnings
Information
If a new component (e.g. sensor, airbag control unit, airbag unit) of the airbag system has to be installed, the new component will be supplied with a barcode sticker (tear-off label).
Sample tear-off label shown >> airbag sensor
- Tear off the tear-off label -2- on the new component -1- and stick it under the heading Proof of airbag system check/component replacement in the Guarantee and Maintenance booklet.
Tear-off label
- The replacement date and mileage must be documented and the booklet must be stamped with the dealer's stamp.
1. Position sensor on the body and screw it down with the fastening nuts -2-. => M6: 8 Nm (6 ftlb.)+/-1 Nm (+/-0.5 ftlb.)
Mounting for installation of sensor
2. Push on the electric connector until it clicks into place.
Installing sensor plug connection
3. Position the support and engage in lower side member.
Engaging support
4. Clip in locating peg -1- and check it is seated correctly.
Installing support
5. Tighten the plastic fastening nuts -3-.
6. Screw in fastening screws -2-. => Final tightening: 7.2 Nm (5.5 ftlb.)
7. Lay the carpet over the support and engage it.
Reworking
Work in wake of front airbag sensor
1. Install front apron. => 631519 Removing and installing front apron - section on "Installing"
2. Connect the battery. => Work instructions after disconnecting the battery
3. Using the PIWIS Tester 97180 , read out the fault memory and erase if required. If further faults exist, proceed in accordance with airbag diagnosis fault code.
Work in wake of centre airbag sensor
1. Screw in screw fastening seat belt to the body. => 691119 Removing and installing front three-point belt - installing
2. Insert sill. => 680519 Removing and installing inner sill
3. Install the rear side-panel lining. => 707519 Removing and installing rear side-panel lining
4. Installing front seat. => Removing and installing front seat
5. Connect the battery. => Work instructions after disconnecting the battery
6. Using the PIWIS Tester 97180 , read out the fault memory and erase if required. If further faults exist, proceed in accordance with airbag diagnosis fault code.