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Home >> Audi >> 2006 >> A4 Cabriolet (8H7) L4-1.8L Turbo (AMB) >> Repair and Diagnosis >> Restraints and Safety Systems >> Sensors and Switches - Restraints and Safety Systems >> Seat Occupant Sensor >> Service and Repair

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 Safety Precautions, side airbags => [ Side Airbag Safety Precautions ] Airbag Safety Precautions and the seat occupied recognition system, refer to => [ Passenger Occupant Detection Sensor Safety Precautions ] Airbag Safety Precautions and => [ Passenger Occupant Detection System, Measures Required after an Accident ] Airbag 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.

• For USA vehicles, modular wiring routing has been implemented from 06.2006.

Perform the following steps before removing the Seat Occupied Recognition Control Module (J706).

- Check the vehicle seat design and if there is modular wiring routing; then perform the appropriate repairs.

- Check which one of the two possible modulate wiring routing is installed, Modular Light or Modular. Refer to => [ Modular Wiring Routing Versions ] Front Seats

Additional information regarding modular wiring routing can be found in the following chapters:

• Modular wiring routing, assembly overview, refer to => [ Modular Wiring Routing Assembly Overview, from June 2006 ] Front Seats

• Modular wiring routing, versions, refer to => [ Modular Wiring Routing Versions ] Front Seats

• Modular wiring routing with corrugated tube on front seat, refer to => [ Modular Wiring Routing with Corrugated Tube on Front Seat ] Front Seats.





1 Seat Occupied Recognition Control Module (J706 )

Removing

CAUTION!
Observe the safety precautions for repairs on airbags. Refer to => [ Airbag System General Safety Precautions ] Airbag Safety Precautions, side airbags => [ Side Airbag Safety Precautions ] Airbag Safety Precautions and the seat occupied recognition system => [ Passenger Occupant Detection Sensor Safety Precautions ] Airbag Safety Precautions and => [ Passenger Occupant Detection System, Measures Required after an Accident ] Airbag Safety Precautions.

- Disconnect the battery ground (GND) strap.

- Remove the passenger seat.

- Mount the Fixture For Seat Repair (VAS 6136) on the Engine And Transmission Holder (VAS 6095).

- Attach the front seat to the Fixture For Seat Repair (VAS 6136).

- Remove the backrest from the. Refer to => [ Front Backrest ] Front Seats power seat => [ Front Backrest ] Power Front Memory Seats.

- Disconnect connector - 6 -.

- Remove bolts - 2 - (Qty. 2).

- Remove cushion from cover. Refer to => [ Seat Pan Cover and Cushion, Standard Seat ] Front Seat Covers and Cushion, => [ Seat Pan Cover and Cushion, Standard Seat ] Front Seat Covers and Cushion, Power Memory Seats.

- Open the guide clip - 8 -.

CAUTION!
Connectors - 3 - and - 7 - must not be separated.

- Slide Seat Occupied Recognition Pressure Sensor ( G452) - 4 - sideways from retaining 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

• deleted on the wiring routing modular => [ Modular Wiring Routing Versions ] Front Seats

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

• Seat removed

With Modular Wiring Routing

- Open the corrugated tube. Refer to => [ Modular Wiring Routing with Corrugated Tube on Front Seat ] Front Seats.

- Remove the Service Kit wire from the corrugated tube. Refer to => [ Modular Wiring Routing with Corrugated Tube on Front Seat ] Front Seats.

Procedure for all vehicles

- 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 - (Qty. 2).

- Carefully pull seat occupied recognition mat - 1 - with cushion - 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

CAUTION!
Observe the safety precautions for repairs on airbags. Refer to => [ Airbag System General Safety Precautions ] Airbag Safety Precautions, side airbags => [ Side Airbag Safety Precautions ] Airbag Safety Precautions and the seat occupied recognition system => [ Passenger Occupant Detection Sensor Safety Precautions ] Airbag Safety Precautions and => [ Passenger Occupant Detection System, Measures Required after an Accident ] Airbag Safety Precautions.

• The hard foam insert in the crease is not included in the service kit. Therefore, reuse the hard foam insert again in the seat crease.

- Guide Seat Occupied Recognition Pressure Sensor ( G452) and Seat Occupied Recognition Control Module (J706) from above through seat pan without disconnecting connectors.

- Pull the crease between seat pan and Seat Occupied Recognition Mat - 1 - so that it is smooth (free of folds).





- Secure the Seat Occupied Recognition Mat - 1 - with the clips - 2 - and - 3 - (Qty. 2).

With Modular Wiring Routing

- Route the Service Kit wire in the corrugated tube. Refer to => [ Modular Wiring Routing with Corrugated Tube on Front Seat ] Front Seats.

- Seal the corrugated tube. Refer to => [ Modular Wiring Routing with Corrugated Tube on Front Seat ] Front Seats.

Procedure for all vehicles





1 Seat Occupied Recognition Control Module (J706 )

Installing

- Secure Seat Occupied Recognition Pressure Sensor (G452) - 4 -.

- Secure Seat Occupied Recognition Control Module ( J706) with bolts - 2 - (Qty. 2) to 2.5 Nm.

- Connect connector - 6 -.

- Upholster the seat pan, thereby all cushion clips must be attached and be installed at the original position. Refer to => [ Seat Pan Cover and Cushion, Standard Seat ] Front Seat Covers and Cushion, for electric seat => [ Seat Pan Cover and Cushion, Standard Seat ] Front Seat Covers and Cushion, Power Memory Seats.

Further installation is performed in the reverse order of removal. Observe the following when doing so:

- After installing the passenger seat in the vehicle, the following program must be performed under "Airbag" 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

After the seat was installed

- Switch on the ignition with the battery disconnected.

CAUTION!
No one should be in vehicle when connecting battery.

- Connect the battery.

• If the Airbag Malfunction Indicator Lamp (MIL) ( K75) shows a malfunction after assembly, DTC memory must be checked with Vehicle Diagnostic, Testing and Information System ( VAS 5051 A), cleared and then rechecked.

2 Bolts

• 2.5 Nm

3 Seat Occupied Recognition Control Module (J706 ) Connector

• 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

• deleted on the wiring routing modular => [ Modular Wiring Routing Versions ] Front Seats

7 Seat Occupied Recognition Pressure Sensor (G452 ) Connector

• Must not be separated under any circumstances.

8 Guide Clip

9 Retaining Bracket
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