Battery Interrupt Igniter -N253-

Special tools and workshop equipment required

Torque Wrench V.A.G 1331

WARNING:

Observe safety precautions when working on battery isolation system. Refer to BATTERY INTERRUPT IGNITER -N253-, SAFETY PRECAUTIONS .
Observe notes for disposal of battery isolator units. Refer to BATTERY INTERRUPT IGNITER DISPOSAL .

Removing

-- Turn off the ignition and all electrical consumers.

-- Disconnect the battery. Refer to BATTERY, DISCONNECTING .

-- Loosen tensioning strap -1- on tool kit and vehicle jack formed insert -2- and remove formed insert -2-.

Fig 1: Identifying Tensioning Strap On Tool Kit, Vehicle Jack Formed Insert And Formed Insert

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-- Open main fuse box catches -arrows- by turning 90° left and fold cover up.

Fig 2: Identifying Main Fuse Box Catches

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-- Remove collar nut -2- and remove line -1- from connector threads.

Fig 3: Identifying Self-Locking Nut, Battery Interrupt Igniter N253, Connector Thread Lines And Collar Nut

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-- Remove self-locking nut -3- and remove Battery Interrupt Igniter -4- from connector threads while being careful of connected lines.

-- Disengage harness connector -1- by pulling locking button -2- in direction of arrow.

Fig 4: Identifying Harness Connector Locking Button And Battery Interrupt Igniter N253

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-- Remove connector -1- and remove Battery Interrupt Igniter -3- from vehicle.

WARNING:

While doing this, observe safety precautions when working on pyrotechnic battery isolation system. Refer to BATTERY INTERRUPT IGNITER -N253-, SAFETY PRECAUTIONS .

Installing

Install in reverse order of removal. Note the following:

NOTE:

When installing connector to Battery Interrupt Igniter, ensure connector engages audibly.

-- Tighten all threaded connections to specified torque. Refer to TIGHTENING SPECIFICATIONS, MAIN FUSE BOX .

-- Connect battery venting hose.

-- Connect battery. Refer to BATTERY, CONNECTING .

CAUTION:

Central battery venting hose must not be kinked, closed and/or damaged. Battery acids pose health risks and are explosive. Carefully route the hose and make sure the battery can vent freely and not into the vehicle interior.