Audi Workshop Service and Repair Manuals

Connecting wiring harnesses 8E1 970 XXX to multi-pin connector for airbag control unit -J234-   WARNING Before handling the airbag units (e.g. unplugging the electrical connector) the mechanic must discharge static electricity by briefly touching the door striker plate, or similar. Audi A4 2001 ► from week 36/2004 onwards (including Audi S4)   Note For ease of illustration, unplugging of the multi-pin connector from the airbag control unit -J234- and opening of the multi-pin connector for connecting the wires from the retrofitted wiring harness are described on the basis of a single multi-pin connector.   WARNING Before unplugging the connector, discharge static by briefly touching door striker plate for example.

–  Move fastener -1- in direction of -arrow- until it engages. –  Turn retaining clip -2- until it engages (“OPEN” position). –  Unplug multi-pin connector -3- from airbag control unit -J234-.

–  Unfasten cable tie -1-. –  Insert a small screwdriver in U-shaped lug at multi-pin connector. –  Prise top part of multi-pin connector -2- over detents -arrows- at bottom part -3-. At the same time, slide top part -2- as far as it will go in direction of -arrow-. –  Lift top part -2- off bottom part -3-.

–  Remove fabric tape in area -a-, starting from multi-pin connector. –  Connect plug contacts -6- to multi-pin connector for airbag control unit -J234-.

Pin assignment on Audi A4 2001 ► from week 36/2004 onwards (including Audi S4) → Current flow diagrams, Electrical fault finding and Fitting locations

Assignment	Pin
Connector of supply lead/wiring harness for glove box: pin 6	59
Warning lamp for airbag deactivated on front passenger side -K145-: pin 3	60
Connector of supply lead/wiring harness for glove box: pin 3	61

–  In area -a- locate earth connector -109- (connector with brown wires) -4-. –  Separate one brown wire with 0.35 mm2 cross section leading out of earth connector -109- -4-. –  Join separated brown wire and brown wire -1- from wiring harness to be retrofitted using wiring harness repair set -VAS 1978- → Electrical system; Rep. Gr.97.   WARNING Observe general instructions for repair work on vehicle electrical system, as well as notes on repairing wiring harnesses, connectors and wiring → Electrical system; Rep. Gr.97.

–  In area -a- locate connector -A 139-, terminal 15 (connector with black wires) -3-. –  Separate one black wire leading out of connector -A 139- -3-. –  Join separated black wire and black wire -2- from wiring harness to be retrofitted using wiring harness repair set -VAS 1978- → Electrical system; Rep. Gr.97.   WARNING Observe general instructions for repair work on vehicle electrical system, as well as notes on repairing wiring harnesses, connectors and wiring → Electrical system; Rep. Gr.97.   Note For ease of illustration, closing and plugging-in of the multi-pin connector at the airbag control unit -J234- are described on the basis of a single multi-pin connector.

–  Position top part -1- of multi-pin connector for airbag control unit -J234- on bottom part -2-.    This involves aligning the tabs -arrows A- with the recesses -arrows B-.

–  Slide top part -1- of multi-pin connector as far as it will go in direction of -arrow-.    When the top part -1- is in the end position, two detents -arrows- must be visible on the bottom part -2-. –  Attach a new cable tie -3- to the top part of the multi-pin connector -2- and the wiring harness. –  Plug in multi-pin connector at airbag control unit -J234-.

–  Turn retaining clip -2- until it engages (“CLOSE” position). –  Move fastener -1- in direction of -arrow- until it engages. –  Make sure the multi-pin connector is properly engaged with the airbag control unit -J234-. –  Attach the retrofitted wiring harness 8E1 970 XXX to the existing wiring harnesses by wrapping completely with fabric tape.

–  Fasten cable tie -3-. –  Make sure the retrofitted wiring harness 8E1 970 XXX cannot become abraded and/or rattle. Audi A4 2001 ► up to week 35/2004 (including Audi S4)   Note For ease of illustration, unplugging of the multi-pin connector from the airbag control unit -J234- and opening of the multi-pin connector for connecting the wire from the retrofitted wiring harness are described on the basis of a single multi-pin connector.   WARNING Before unplugging the connector, discharge static by briefly touching door striker plate for example.

–  Press fastener -1- in direction of -arrow- and at the same time swivel retaining clip -3- to front until it engages. –  Unplug multi-pin connector -2- from airbag control unit -J234-. –  Unfasten cable tie -4-. –  Use small screwdriver to release retaining tabs -arrows A-.

–  Use small screwdriver to press socket housing -2- out of cap -1- through slits on front of multi-pin connector. –  Pull socket housing -2- completely out of cap -1-.

–  Remove fabric tape in area -a-, starting from socket housing -3-. –  Connect plug contact -1- to socket housing -3-.

Pin assignment on Audi A4 2001 ► up to week 35/2004 (including Audi S4) → Current flow diagrams, Electrical fault finding and Fitting locations

Assignment	Pin
Airbag control unit -J234-: pin 70	4

–  Separate black wire leading out of pin 65 (terminal 15) of socket housing -3- at a suitable location. –  Join separated black wire and black wire -2- from wiring harness to be retrofitted using wiring harness repair set -VAS 1978- → Electrical system; Rep. Gr.97.   WARNING Observe general instructions for repair work on vehicle electrical system, as well as notes on repairing wiring harnesses, connectors and wiring → Electrical system; Rep. Gr.97.   Note For ease of illustration, closing and plugging-in of the multi-pin connector at the airbag control unit -J234- are described on the basis of a single multi-pin connector.

–  Slide home socket housing in cap -2-. –  Make sure retaining tabs of socket housing are properly engaged in openings of cap -arrows A-. –  Fit a new cable tie -4- at cap and wiring harness. –  Plug in multi-pin connector -2- at airbag control unit -J234-. –  Swivel retaining clip -3- to rear until it engages with fastener -1-. –  Make sure multi-pin connector is properly engaged with airbag control unit -J234-. –  Attach the retrofitted wiring harness 8E1 970 XXX to the existing wiring harnesses by wrapping completely with fabric tape. –  Fasten cable tie on centre tunnel. –  Make sure the retrofitted wiring harness 8E1 970 XXX cannot become abraded and/or rattle.