Engine Control Module, with Anti-Theft Protection

Engine Control Module, with Anti-Theft Protection

Special tools, testers and auxiliary items required

• Locking pliers

• Window cutter (VAG 1561A)

• Saw set (VAG 1561/14)

• Hot air gun from wiring harness repair kit (VAS 1978)

• Attachment nozzle from wiring harness repair kit (VAS 1978)

• If it is desired to replace the Engine Control Module (ECM), connect the (VAS 5051) and perform the guided function " Replace control module".

Removing

- Switch off the ignition.

- Remove the wiper arms and plenum chamber cover.

- Remove the plenum chamber bulkhead.

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

CAUTION!
Cover wires, harness connectors and control modules in close vicinity to the ECM to prevent damage from burning.

Perform the adjustments on the hot air gun - 4 - as shown:

- Turn the potentiometer for the temperature adjustment - 2 - to maximum heat output (600 °C).





- Move two stage switch for air quantity - 3 - to position 3.

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

- Guide the nozzle of the hot air gun onto the shear bolts.

- Switch on the heat gun and heat the bolt for approximately 20 to 25 seconds.

- Remove the shear bolt using pliers on the head.

The procedure for the second shear bolt is exactly the same.

• If the bolts cannot be removed, cut into the heads so two parallel surfaces are formed - arrows - and then remove them using a screwdriver.





- Insert a screwdriver - A - between the protective housing and retaining plate - arrow -.





- Pry the protective housing upward using the screwdriver - A - and pull it off sideways from the retaining plate - arrow -.





- Disengage the forward electrical connector - 1 - from the ECM and disconnect it.





- Pry up the locking mechanism - 2 - slightly.

- Then slide the ECM out of the retainer - arrow -.

- Now disengage the rear electrical connector from the ECM and disconnect it.

Installing

- Connect the rear electrical connector to the ECM and engage it.

- Slide the ECM onto the retaining plate.

- Press the locking mechanism - 2 - against the ECM.





- Now connect the forward electrical connector - 1 - to the ECM and engage it.

- Slide the protective housing onto the retaining plate.

- Tighten the shear bolts - 1 - uniformly until the bolt heads shear off.





- Install the plenum chamber bulkhead.

- Install the wiper arms and plenum chamber cover.