Engine Control Module 2, Slave: Removing

• Turn ignition and remove the ignition key.
• Remove rubber seal -1- and remove plenum chamber cover -2-.

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• Carefully pull cowl grill as far as necessary out of retainer on windshield.
• Remove Engine Control Module (ECM) 2 -J624- -1-.

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Remove Engine Control Module (ECM) 2 -J624-.

To increase the difficulty with which the ECM connectors can be accessed, the ECM is secured in a metal housing with retaining tabs and shear bolts.

The threads of the shear bolts -4- (that are not installed in ECM) are coated with a locking compound. For this reason, the threads must be heated with the heat gun to remove both bolts.

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The threads of both shear bolts -3- (that are installed in ECM) are not coated with a locking compound. The threads in the ECM housing must not be heated and do not require to be heated (unintentional heating of the ECM).

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Set the adjustment on the heat gun as shown in the illustration, with the temperature potentiometer -2- set to maximum heat and the two-stage air flow switch -3- set to level 3.

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Warm threads on connector side of shear bolts as shown in illustration.

Switch on heat gun and heat the bolt for approximately 20 to 30 seconds.

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• Remove shear bolts with locking pliers (see direction of -arrow-).

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• Both shear bolts that are screwed into the ECM do not require heating to be removed. They can be removed without heat.
• Disconnect metal retainers from connectors.
• Remove both retainer bolts from Engine Control Module (ECM) 2 -J624-.
• Disengage connector from Engine Control Module (ECM) 2 - J624- and remove connector.
• Remove old Engine Control Module (ECM) 2 -J624- and connect new one.