DME Control Unit Removal

Overview

This procedure outlines the removal of the DME (Digital Motor Electronics) control unit for a Porsche 944 equipped with a 16v engine. The DME unit controls fuel injection and ignition timing, critical for engine performance in the 944. Proper removal ensures the unit can be safely accessed for repair or replacement.

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Tools Required

• Phillips Head Screwdriver
• 13mm (1/2 inch) open-end wrench

Step-by-Step Removal Procedure

Step 1: Disconnect the Battery

1. Locate the battery in the engine compartment at the front of the Porsche 944.
2. Use a 13mm (1/2 inch) open-end wrench to loosen the nut on the negative battery terminal.
3. Remove the negative lead from the battery and secure it away from the terminal to prevent accidental contact.

Step 2: Access the DME Control Unit

4. Move to the passenger side of the Porsche 944 interior and pull back the carpet at the front of the passenger footwell.
5. Locate the wooden panel covering the DME control unit in the footwell.
6. Use a Phillips head screwdriver to remove the four screws securing the wooden panel.
7. Lift the panel out of the footwell to expose the DME control unit and its mounting bracket.

Step 3: Remove the DME Control Unit

8. Identify the two screws securing the DME control unit’s mounting bracket.
9. Use a Phillips head screwdriver to remove the two mounting bracket screws.
10. Gently pull the DME control unit forward to access the wiring harness plug.
11. Locate the retaining clip on the cable end of the wiring harness plug.
12. Press and release the clip, then swing the connector upward and out of the DME control unit plug.
13. Carefully remove the DME control unit from its position in the footwell.

Sources

• Clark’s Garage
• Pelican Parts
• Porsche 944 Workshop Manual, Volume 1
• YouTube