Air Bag Systems: Service and Repair

Passive Occupant Detection System


• Follow all safety precautions when working on the airbag, refer to => [ Airbags Safety Precautions ] Airbags Safety Precautions and passenger occupant detection system passenger airbag deactivation. Refer to => [ Passive Occupant Detection System Safety Precautions ] Passive Occupant Detection System Safety Precautions.

• Before handling pyrotechnical components (for example, disconnecting the connector), the person handling them must "discharge static electricity". For example, by briefly touching the door striker pin.


The passenger occupant detection system service kit is precalibrated and must not be disconnected. The service kit consists of:

• Seat Occupied Recognition Control Module (J706)

• Seat Occupied Recognition Pressure Sensor (G452)

• Passive Occupant Detection System Mat

• Seat cushion

Removing

- Move the seat height to the middle position before removing the seat.

- Remove the passenger seat. Refer to => [ Front Seat ] Front Seat.

- Disconnect the battery ground cable with the ignition switched on.

• On vehicles with a luggage pass-through, it is sufficient to fold the backrest forward, it does not have to be removed.

- Remove front backrest. Refer to => [ Backrest ] Backrest.

• Do not disconnect the connectors from the seat occupied recognition pressure sensor (G452) and seat occupied recognition control module (J706).

- Using a narrow screwdriver, carefully press the seat occupied recognition pressure sensor (G452) - item 3 - off the bracket - arrow -.






- Open the seat occupied recognition pressure hose guide - 1 - and free up the pressure hose - 2 -.

- Release the retaining spring - 1 - and tilt the seat occupied recognition control module (J706) - item 2 - out of the mount.






- Remove the electrical connector - 4 - from the bracket by pressing the release and removing the electrical connector.

- Open the retaining tab on the electrical wiring harness guide - 5 - - arrow - and free up the wiring harness - 3 -.

- Remove the front seat cover and cushion. Refer to => [ Front Seat Pan Cover and Upholstery ] Front Seat Pan Cover and Upholstery.

- Carefully pry out the seat occupied recognition mat clips - 1 - and - 3 - on the front of the seat pan using a pry lever (80 - 200).






- Remove the seat pan cover with upholstery by first guiding the seat occupied recognition pressure sensor (G452) through the opening in the lower seat frame.


Damage risk.

• Do not bend the seat occupied recognition pressure hose and mat.

- Remove the cover and cushion, the mat for the - 2 - passenger occupant detection system and the passenger occupant detection system pressure sensor (G452).

Installation

- Clean the threaded bolt holes for self-locking nuts, for example using a thread tap.

- Replace all self-locking bolts.

Installation is reverse of removal, but note the following:


• Follow all safety precautions when working on the airbag, refer to => [ Airbags Safety Precautions ] Airbags Safety Precautions and passenger occupant detection system passenger airbag deactivation. Refer to => [ Passive Occupant Detection System Safety Precautions ] Passive Occupant Detection System Safety Precautions.

• Before handling pyrotechnical components (for example, connecting electrical connector), the person handling them must "discharge static electricity". For example, by briefly touching the door striker pin.

• Do not bend the seat occupied recognition pressure hose and mat.

• Make sure the connectors are installed all the way in and are secure.


Connect the battery with the ignition switched on. Pyrotechnic components could deploy after connecting the battery if they were not repaired correctly. Individuals must not be inside the vehicle when connecting the battery.

- Connect the battery ground cable with the ignition turned on.

When installing a new service kit and after each repair on the front passenger seat where the seat and/or the backrest cover is disengaged, a basic setting procedure must be performed on the seat occupied recognition control module.

- At the end, select the "Airbag" function in "guided fault finding" using Vehicle diagnosis, testing and information system VAS 5051.

• -J706 Passive occupant detection system control module basic setting