Seat Occupant Sensor: Service and Repair
Passive Occupant Detection System
CAUTION!
Observe the safety precautions for repairs on airbags. Refer to => [ Airbag System General Safety Precautions ] Airbag System General Safety Precautions and side airbags => [ Side Airbag Additional Safety Precautions ] Side Airbag Additional Safety Precautions and the seat occupied recognition system => [ Passenger Airbag Seat Occupied Recognition Additional Safety Precautions ] Passenger Airbag Seat Occupied Recognition Additional Safety Precautions.
CAUTION!
Replacement part (service kit) for seat occupied sensor (USA) is already pre-calibrated and must not be disconnected under any circumstance. The service kit consists of:
• Seat Occupied Recognition Control Module (J706)
• Seat Occupied Recognition Pressure Sensor (G452)
• Passive Occupant Detection System Mat
• Seat cushion
• Wiring harness between Seat Occupied Recognition Control Module (J706) and Seat Occupied Recognition Pressure Sensor (G452)
• The passive occupant detection system is only installed on the front passenger seat.
1 Seat Occupied Recognition Control Module (J706)
Removing
- Disconnect the battery ground (GND) strap.
- Remove passenger seat:
• Front seat (standard seat), removing and installing, refer to => [ Standard Front Seat ] Standard Front Seats
• Front seat (memory seat, electric seat - standard seat/sport seat), removing and installing, refer to => [ Power Front Memory Seat ] Power Front Memory Seats
• Front seat (S6 - memory seat, electric seat) removing and installing, refer to => [ Front Seat ] Power Front Memory Seats.
- Mount the (VAS 6136) on the (VAS 6095).
- Attach the front seat to the (VAS 6136).
- Remove backrest:
• Front backrest (standard seat), removing and installing, refer to => [ Standard Front Seat Backrest ] Standard Front Seats
• Front backrest (memory seat, electric seat - standard seat/sport seat), removing and installing, refer to => [ Front Backrest ] Power Front Memory Seats
• Front backrest (S6 - memory seat, electric seat), removing and installing, refer to => [ Front Backrest ] Power Front Memory Seats.
- Disconnect the connector - 6 -.
- Remove bolts - 2 - (quantity: 2).
- Remove upholstery from cover:
• Seat pan cover and upholstery, removing and installing (standard seat), refer to => [ Seat Pan Cover and Upholstery, Standard Seat ] Seat Pan Cover and Upholstery, Standard Seat
• Seat pan cover and upholstery, removing and installing (memory seat, electric seat - standard seat), refer to => [ Seat Pan Cover and Upholstery, Standard Seat ] Seat Pan Cover and Upholstery, Standard Seat
• Seat pan cover and upholstery, removing and installing (memory seat, electric seat - sport seat), refer to => [ Seat Pan Cover and Upholstery, Sport Seat ] Seat Pan Cover and Upholstery, Sport Seat
• Seat pan cover and upholstery, removing and installing (S6 - memory seat, electric seat), refer to => [ Seat Pan Cover and Upholstery ] Seat Pan Cover and Upholstery
- Open the guide clip - 8 -.
CAUTION!
Connectors - 3 - and - 7 - must not be separated.
- Slide Seat Occupied Recognition Pressure Sensor (G452) - 4 - sideways from clip - 9 -.
2 Bolts
• 2.5 Nm
3 Connector on Seat Occupied Recognition Control Module (J706)
• Must not be separated under any circumstances.
4 Seat Occupied Recognition Pressure Sensor (G452)
5 Pressure Hose
6 Connector between Service Kit and Seat Wiring Harness
7 Connector on Seat Occupied Recognition Pressure Sensor (G452)
• Must not be separated under any circumstances.
8 Guide Clip
9 Retaining Bracket
Service kit, Removing
- Fold the cushion - 5 - upward.
• The cushion is included as part of the service kit.
• Clip - 4 - must not be separated.
• The hard foam insert in the crease is not included in the service kit.
- Remove clips - 2 - and - 3 - (quantity: 2).
- Carefully pull seat occupied recognition mat - 1 - with upholstery - 5 - upward while guiding Seat Occupied Recognition Pressure Sensor (G452) and Seat Occupied Recognition Control Module (J706) through seat pan without disconnecting connectors.
- Remove the complete service kit.
CAUTION!
The pressure hose and the Seat Occupied Recognition Mat - 1 - must not be kinked under any circumstances during repairs.
Service kit, installing
• The hard foam insert in the cover is not part of the service kit. Reuse the insert that is already in the seat cover.
- Guide Seat Occupied Recognition Pressure Sensor (G452) and Seat Occupied Recognition Control Module (J706) from above through seat pan without disconnecting connectors.
- Pull the cover between the seat pan and passenger occupant detection system mat - 1 - so that it is smooth and free of creases.
- Secure the Seat Occupied Recognition Mat - 1 - with the clips - 2 - and - 3 - (quantity: 2).
1 Seat Occupied Recognition Control Module (J706)
Installation
- Secure Seat Occupied Recognition Pressure Sensor (G452) - 4 - on bracket - 9 -.
- Secure Seat Occupied Recognition Control Module (J706) with bolts - 2 - (quantity: 2) to 2.5 Nm.
- Connect connector - 6 -.
- Upholster the seat pan, thereby all upholstery clips must be attached and be installed at the original position:
• Standard seat: Standard seat refer to => [ Seat Pan Cover and Upholstery, Standard Seat ] Seat Pan Cover and Upholstery, Standard Seat, Sport seat refer to => [ Seat Pan Cover and Upholstery, Sport Seat ] Seat Pan Cover and Upholstery, Sport Seat.
• Power seat: Standard seat refer to => [ Seat Pan Cover and Upholstery, Standard Seat ] Seat Pan Cover and Upholstery, Standard Seat, Sport seat refer to => [ Seat Pan Cover and Upholstery, Sport Seat ] Seat Pan Cover and Upholstery, Sport Seat.
Further installation is performed in the reverse order of removal.
- After installing passenger seat, select "Airbag" function in "Guided Fault Finding".
When installing a new service kit and after every repair on the front passenger seat:
• Seat Occupied Recognition Control Module (J706), basic setting
2 Bolts
• 2.5 Nm
3 Connector on Seat Occupied Recognition Control Module (J706)
• Must not be separated under any circumstances.
4 Seat Occupied Recognition Pressure Sensor (G452)
5 Pressure Hose
CAUTION!
The pressure hose - 5 - and the Seat Occupied Recognition Mat must not be kinked under any circumstances during repairs.
- Secure pressure hose at guide clip - 8 - at specified marking.
6 Connector between Service Kit and Seat Wiring Harness
7 Connector on Seat Occupied Recognition Pressure Sensor (G452)
• Must not be separated under any circumstances.
8 Guide Clip
9 Retaining Bracket