Engine Control Module -J623- WITH PROTECTIVE HOUSING, REMOVING AND INSTALLING

Special tools and workshop equipment required

Hot Air Gun from Wiring Harness Repair Set: VAS1978B .
Attachment nozzle from Wiring Harness Repair Set: VAS1978B .
Locking pliers

NOTE:

To replace the Engine Control Module (ECM), perform guided fault function "replace engine control module" Vehicle Diagnostic Tester.

Removing

-- Turn off the ignition.

-- Remove the wiper arms. Refer to WIPER ARMS, REMOVING AND INSTALLING .

-- Remove the plenum chamber cover. Refer to PLENUM CHAMBER COVER .

-- Cover the engine compartment in the area near the ECM to prevent scratching the paint.

-- Remove the bolts and the ECM.

Fig 1: Identifying Bolts And ECM Housing

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

NOTE:

Thread of shear bolts is equipped with locking compound. By heating the shear bolts using a hot air gun, inhibition effect of the locking compound is lowered.

CAUTION:

Make sure the parts cannot get burned.

By heating the shear bolts, parts of the protective housing are heated intensely. Wear safety gloves to prevent injuries.

-- Warm the shear bolt -arrows- with a hot air gun.

Fig 2: Identifying Bolt -1- And Housing

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Loosen the bolt -1- with locking pliers.

-- Bend the edges of the housing down and remove the bolts.

Installing:

-- Replace the protective housing.

-- Install a new protective housing with new shear bolts.

-- Tighten the shear bolts evenly until the bolt head shears off.

-- Install the ECM into the plenum chamber.

-- Install the plenum chamber cover. Refer to PLENUM CHAMBER COVER .

-- Install the wiper arms. Refer to WIPER ARMS, REMOVING AND INSTALLING .