Assembly overview ? airbag control unit
1 - Nut
❏ qty. 3
❏ 9 Nm
2 - Electrical connector
3 - Airbag control unit -J234-
❏ earthed to body via housing
❏ → Rep. gr.69; Removing and installing airbag control unit -J234-
Removing and installing airbag control unit [J234], left-hand drive vehicles
Special tools and workshop equipment required
♦ ratchet ring attachment -VAS 262 015-
The airbag control unit -J234- will henceforth be referred to as “airbag control unit”.
Removing
– Disconnect battery earth cable → Electrical system; Rep. gr.27; Battery; Disconnecting and connecting battery.
Vehicles with tunnel support cover
– Remove tunnel support cover → General body repairs, interior; Rep. gr.70; Dash panel; Removing and installing tunnel support cover.
All vehicles (continued)
– Fold back floor covering in area of airbag control unit.
CAUTION
It is possible to trigger pyrotechnic components unintentionally.
Risk of injury
– Discharge static electricity by briefly touching door striker plate.
– Release safety latch -4- in direction of -arrow A-, and open latch -5- in direction of -arrow B-.
– Separate electrical connector.
– Unscrew nuts -3-.
– Loosen nut -1- using ratchet ring attachment -VAS 262 015-.
NOTICE
Risk of damage to airbag control unit. Electrical connectors corrode when exposed to moisture.
– After unplugging connectors for control unit, cover them or seal them off to prevent moisture from entering.
– Detach airbag control unit -2- from studs, and remove it towards front passenger side.
Installing
Install in reverse order of removal, observing the following:
– Connect battery earth cable → Electrical system; Rep. gr.27; Battery; Disconnecting and connecting battery.
CAUTION
It is possible to trigger pyrotechnic components unintentionally.
Risk of injury.
– Stay as far back as possible from pyrotechnic components when switching on the ignition.
– Switch on ignition.
– Read and clear event memory using → Vehicle diagnostic tester.
If airbag control unit -J234- has been renewed:
– Perform function “Conclude commissioning” with → Vehicle diagnostic tester → Rep. gr.00; Access to diagnoses.
Continued
Tightening torques
♦ → Rep. gr.69; Assembly overview – airbag control unit
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