Engine Control Module -J623-, Removing And Installing, Engine Control Module With Protective Housing: Removing

Remove the shear bolts -arrows- to remove the protective housing -1- as follows:

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-- Use a mini-grinder -2- to make a slit in the head of the shear bolt -1- for a screwdriver.

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NOTE:

The threads of the shear bolts were installed with a locking fluid. For this reason, the threads must be heated with the heat gun to remove the bolts.

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-- Adjust the settings on the hot air gun as shown. That means the temperature potentiometer -2- set to maximum heat and the two-stage airflow switch -3- set to level 3.

WARNING:

Danger of getting burned by the hot air gun.

By heating the threads, the retaining tabs, shear bolts and parts of the metal housing become very hot. Make sure that only the thread is heated and not any of the surrounding parts. Cover these up if necessary.

-- Warm the head of the shear bolt -1- for approximately 20 to 30 seconds.

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-- Remove the shear bolt -1- with a screwdriver -2-.

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CAUTION:

Contacting the engine control module with the battery positive terminal damages the engine control module. For this reason the battery must be disconnected before removing the engine control module from its holder. Refer to BATTERY, DISCONNECTING AND CONNECTING .

-- Open the retainer in direction of -arrow- and remove the engine control module -1-.

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-- Unlock and disconnect the connectors from the Engine Control Module -J623-.