Alcohol Interlock System - Wires, Routing And Connecting

• Route the wires so they cannot be pinched or abraded.

Installing

Prepare the vehicle interior for installation

-- Switch off the ignition.

-- Remove the A-pillar lower right trim panel. Refer to A-PILLAR LOWER TRIM PANEL, REMOVING AND INSTALLING .

-- Remove the B-pillar lower right trim panel. Refer to B-PILLAR LOWER TRIM PANEL, REMOVING AND INSTALLING .

-- Remove the right rear sill panel. Refer to SILL PANEL, REMOVING AND INSTALLING .

Vehicles with a high-voltage system

-- Remove the luggage compartment floor. Refer to LUGGAGE COMPARTMENT FLOOR, REMOVING AND INSTALLING, VEHICLES WITHOUT HIGH-VOLTAGE SYSTEM .

Continuation for all vehicles

-- Disconnect the battery. Refer to BATTERY A, DISCONNECTING AND CONNECTING, VEHICLES WITHOUT ALTERNATIVE DRIVE SYSTEM, (0K0) / BATTERY A, DISCONNECTING AND CONNECTING, VEHICLES WITH HIGH-VOLTAGE SYSTEM, (0K3) / BATTERY A, DISCONNECTING AND CONNECTING, VEHICLES WITH ALTERNATIVE DRIVE SYSTEM, (0K4) .

-- Remove the glove compartment. Refer to GLOVE COMPARTMENT, REMOVING AND INSTALLING .

-- Remove the rear panel sill frame. Refer to REAR PANEL SILL FRAME, REMOVING AND INSTALLING .

Route and connect the LIN bus wire

-- Release the retainers -arrows- and guide out the Comfort System Central Control Module -J393- -1- from the mount.

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-- Disconnect the blue connector -2- from the comfort system central control module -1-.

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-- Cut the cable tie -1-.

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-- Release the connector housing -3- from the retainers -2- and remove the connector terminal strip -4- from the connector housing.

• Pay attention to the connector assignment PIN 4 -arrow- at the connector housing.

-- Insert the prepared LIN bus wire -2- into the connector strip terminal on Pin 4 -arrow-.

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-- Slide on the connector housing onto the connector strip terminal all the way and secure with cable ties.

-- Connect the connector to the central control module and install the central control module.

LHD vehicle

-- Route the LIN bus wire -3- along the left side of the wiring harness toward the front.

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-- Raise the carpet in front of the bench seat slightly.

-- Route the LIN bus wire -3- under the carpet to the right side sill.

-- Route the LIN bus wire along the right side of the side sill toward the front up to the back of the glove compartment.

Route the positive cable terminal 30 and connect

-- Remove the Relay and Fuse Panel 3 -SR3-. Refer to OVERVIEW - RELAY PANELS, FUSE PANELS AND E-BOXES .

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-- Prepare the fuse 15, 20 A -lower arrow- on the fuse panel M -upper arrow-, but do not attach yet.

-- Open the clamps -arrows- and remove the cover -1-.

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-- Remove the retaining strip -1- for the connectors -arrow-.

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-- Insert the prepared positive cable terminal 30 -1- on the rear side on location SM15.

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-- Press in the retaining strip -3-.

-- Clip on the fuse panel cover.

-- Attach the fuse panel -2- into the relay and fuse panel.

LHD vehicle

-- Route the positive cable terminal 30 -3- along the left side of the LIN bus wire toward the front.

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-- Raise the carpet in front of the bench seat slightly.

-- Route the terminal 30 positive cable -3- under the carpet to the right side sill.

-- Bring together both wires at the right side sill and forward behind the glove compartment. Secure them every 20 cm with cable ties.

Route the ground wire terminal 31 and connect

-- Remove the nut -1- on the A-pillar ground connection (on an RHD vehicle: the layout is a mirror image).

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-- Secure the prepared terminal 31 ground wire on the ground connection -1-. Refer to Wiring Diagrams, Component Locations: Ground Connections.

-- Route the terminal 31 ground wire with the LIN bus wire and terminal 30 positive cable up to the glove compartment. Secure them every 20 cm with cable ties.

Wire routing in glove compartment

-- Drill an 11 mm diameter hole in the glove compartment and install a grommet -1- 4B0 971 908 A.

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-- Combine all three wires -2- in a mesh sleeve, add a heat-shrinkable tube and insert it through the grommet -1-, about 25 cm into the glove compartment.

-- Connect the alcohol interlock system inside the glove compartment, following the manufacturer instructions and secure it in the glove compartment.

-- Further installation is performed in reverse order of the removal.