Engine Control Module -J623-, With An Anti-Theft Immobilizer

If replacing the Engine Control Module (ECM), then connect the vehicle diagnostic tester and perform the Guided Function "Replace Control Module".

Removing

-- Turn off the ignition.

-- Remove the windshield wiper arms. Refer to WINDSHIELD WIPER ARMS .

-- Remove the plenum chamber bulkhead. Refer to Description and Operation .

-- Push the retaining frame in the -direction of the arrow- downward and remove the ECM.

Fig 1: Identifying Direction To Push Retaining Frame

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-- Push the retainers in the -direction of the arrow- and disconnect the connector.

Fig 2: Identifying Direction(s) To Push Retainers

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Installing

-- Connect the connector to the ECM and push the retainers all the way in, in the -direction of the arrow-.

Fig 3: Identifying Direction(s) To Push Retainers

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-- Mount the ECM into the retaining frame and push it in, in the -direction of the arrow- upward.

Fig 4: Identifying Direction To Push Retaining Frame

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Install the plenum chamber bulkhead. Refer to Description and Operation .

-- Install the windshield wiper arms. Refer to WINDSHIELD WIPER ARMS .

If replacing the Engine Control Module (ECM), then connect the vehicle diagnostic tester and perform the Guided Function "Replace Control Module".

Removing

-- Turn off the ignition.

-- Remove the windshield wiper arms. Refer to WINDSHIELD WIPER ARMS .

-- Remove the plenum chamber bulkhead. Refer to Description and Operation .

-- Push the retaining frame in the -direction of the arrow- downward and remove the ECM.

Fig 1: Identifying Direction To Push Retaining Frame

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-- Remove the shear bolts -arrows- with pliers.

Fig 2: Locating Shear Bolts

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-- Slide a screwdriver between both locking plates -arrow-.

Fig 3: Identifying Screwdriver Placed Between Locking Plates Of Locking Bracket -1-

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-- Carefully push the screwdriver in the -direction of the arrow- and at the same time bend the locking bracket -1- upward.

-- Bend the locking bracket -1- in the -direction of the arrow- until it can be removed from the connectors.

Fig 4: Identifying Removal Of Locking Bracket -1-

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-- Push the retainers in the -direction of the arrow- and disconnect the connector.

Fig 5: Identifying Direction(s) To Push Retainers

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Installing

-- Connect the connector to the ECM and push the retainers all the way in, in the -direction of the arrow-.

Fig 6: Identifying Direction(s) To Push Retainers

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Place the locking bracket -1- on the connectors and press it in the -direction of the arrow-.

Fig 7: Identifying Installation Of Locking Bracket -1-

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-- Install the bolts -2- all the way into the hole on the ECM housing.

-- Secure the locking bracket to the ECM with new shear bolts -arrows-.

Fig 8: Locating Shear Bolts

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-- Tighten the shear bolts -arrows- evenly until the bolt heads break off.

-- Mount the ECM into the retaining frame and push it in, in the -direction of the arrow- upward.

Fig 9: Identifying Direction To Push Retaining Frame

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Install the plenum chamber bulkhead. Refer to Description and Operation .

-- Install the windshield wiper arms. Refer to WINDSHIELD WIPER ARMS .