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Volkswagen ID.4 Owners & Service Manuals

Volkswagen ID.4: Airbag control unit

Volkswagen ID.4 (E21) 2021-2025 Service Manual / General body repairs, interior / Passenger protection / Airbag control unit

Assembly overview   airbag control unit

  1. Nut
  • qty. 3
  • 9 Nm
  1. Electrical connectr
  2.  Airbag control unit - J234-
  • earthed to body via housing
  • ⇒ Rep. gr. 69 ; Removing and installing airbag control unit -J234-

Volkswagen ID.4. Assembly overview   airbag control unit

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-.
  • Disconnect 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.

Volkswagen ID.4. Removing and installing airbag control unit [J234], left-hand drive vehicles

  • 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

Removing and installing airbag control unit J234, right-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

  • Remove front seats ⇒ Rep. gr. 72 ; Removing and installing front seat .
  • Remove front sill panel mouldings ⇒ Rep. gr. 70 ; Removing and installing front sill panel moulding .
  •  Remove lower A-pillar trims ⇒ Rep. gr. 70 ; Removing and installing lower A-pillar trim .
  • Remove tunnel support cover ⇒ Rep. gr. 70 ; Removing and installing tunnel support cover .
  • Disconnect battery earth cable ⇒ Electrical system; Rep.

    gr. 27 ; Battery; Disconnecting and connecting battery .

  • Lift up floor covering slightly between front and rear screw connections of front seats.
  • Pull floor covering back sufficiently to enable access to 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-.
  • Disconnect 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.

Volkswagen ID.4. Removing and installing airbag control unit J234, right-hand drive vehicles

  • 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 electrical connector until it engages audibly.
  • 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

Volkswagen ID.4 (E21) 2021-2025 Service Manual

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