Front Passenger Seat Occupant Sensor G128

Front Passenger Seat Occupant Sensor (G128)

• The front passenger seat occupant sensor (G128) is only installed in the front seat.

Special tools, testers and auxiliary items required

• Hot air blower (VAS 1978/14A) , for the comfort seat only

Removing

• Follow all safety precautions when working on pyrotechnic components. Refer to => [ Safety Precautions ] Service 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.

- Turn on the ignition.

- Disconnect the ground cable from the battery.

- Remove the front seat on the passenger side:

• Standard seat and Sport seat (manual), refer to => [ Manual Standard Front Seat ] Manual Standard Front Seat.

• Standard seat, Sport seat (power) and Comfort seat, refer to => [ Power Standard Front Seat ] Power Standard Front Seat.

• Super sport seat, refer to => [ Super Sport Front Seat ] Super Sport Front Seat.

- Attach the front seat to the fixture for seat repair (VAS 6136). Refer to => [ Front Seat, Installing on the ] Front Seat, Installing on the Fixture For Seat Repair (VAS 6136).

- Separate the cover from the upholstery (seat pan). Refer to => [ Lower Seat Frame without Seat Depth Adjuster, Cover and Padding, Separating and Connecting ] Lower Seat Frame Without Seat Depth Adjuster, Cover and Padding, Separating and Connecting.

• Remove the upholstery from the rear part of the cover until the seat occupied sensor is freed up.

Standard Seat and Sport Seat (manual or power):

- Remove the seat occupied sensor connector - 2 -.

- Carefully remove seat occupant sensor - 2 - including circuit board - 4 - from seat cushion - 1 -.

Comfort Seat:

- Carefully warm seat heating element - 1 - on the left side using the hot air blower (VAS 1978/14).

- Remove the seat heating element - 2 - - arrow - until the seat occupied sensor - 1 - is freed up.

- Remove the seat occupied sensor connector.

- Carefully remove seat occupant sensor - 4 - including circuit board - 3 - from seat cushion - 1 -.

Super Sport Seat:

- Remove the seat occupied sensor connector - 2 -.

- Carefully remove seat occupant sensor - 2 - including circuit board - 4 - from seat cushion - 1 -.

Installing

• Follow all safety precautions when working on pyrotechnic components. Refer to => [ Safety Precautions ] Service 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.

Standard Seat and Sport Seat (manual or power):

- Position circuit board - 3 - for seat occupant sensor - 4 - in opening - 2 - in seat cushion - 1 -.

The new seat occupied sensor should be installed in the same location on the seat upholstery as the old seat occupied sensor.

- Align the seat occupied sensor on the seat upholstery according to the markings - a -.

• Dimension - a - = 20 mm.

- Remove the protective film and bond the seat occupied sensor firmly to the upholstery.

Super Sport Seat:

- Position circuit board - 4 - for seat occupant sensor - 2 - in opening - 3 - in seat cushion - 1 -.

- Align the seat occupied sensor - 2 - on the seat upholstery - 1 - according to the markings - arrows -.

The new seat occupied sensor should be installed in the same location on the seat upholstery as the old seat occupied sensor.

- Remove the protective film and bond the seat occupied sensor - 2 - firmly to the upholstery - 1 -.

Procedure For All Seat Versions:

Further installation is performed in reverse sequence of removal, but observe the following:

• Make sure the seat occupied sensor is not covered by the seat heater element heating coils.

• 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 (GND) cable with the ignition turned on.

• If the airbag indicator lamp (K75) indicates a fault after installation, check the DTC memory, erase it and check it again using the vehicle diagnostic tester.