Removal & Installation
- As part of the anti-theft system on cars equipped with an engine immobilizer, the ECM box in the engine compartment is locked into place with a locking strip. The locking strip is installed with a security screw. See Fig 1. Mark up the center of the screw and drill a suitable hole for a screw puller. Insert screw puller and remove the screw. Remove the security strap across the control module box cover. Clean the control module box cover carefully so that no dirt or residue falls into the box when it is opened.
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- Check that supply from main relay has been interrupted. Easiest method is to place fingertips on idle air control valve. When the valve stops vibrating, the main relay has cut off supply to the system.
- Open ECM box cover and remove Motronic ECM (module nearest engine). See Fig 2.
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- Inspect connector pins and sockets for damage. Install ECM. Connect scan tool to DLC. See Fig 3. Switch on ignition. Read off any Diagnostic Trouble Codes (DTCs). Erase DTCs and reset adaptive functions using scan tool.
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