DME Control Module EPROM Replacement (12 08 95 (4274))

A. PREPARATORY EPROM REPLACEMENT INSTRUCTIONS

Before beginning the EPROM exchange the attached instructions must be followed and the proper tools must be used.

1. ENVIRONMENT
   The work area where the EPROM is exchanged must be free of excessive dust and aggressive chemicals or vapors. A small uncarpeted office within the dealership is recommended. Since low atmospheric humidity promotes static electricity, an evaporating bowl of water can be used to raise the humidity level of the work area.
2. EQUIPMENT
   Screwdriver (flat blade type) is used to open and close the control module. The EPROM is exchanged using an IC extractor/inserter set. Tool sets can be obtained locally (Radio Shack, Archer #276-1581).
3. STATIC ELECTRICITY
   The engine control module can be damaged and rendered unusable by static electrical discharge. For this reason the 3M static protection kit (P/N 88 88 6 900 333) or equivalent must be used and properly grounded during the entire EPROM procedure.
4. EPROM STORAGE
   Replacement EPROMs must be stored in the original shipment containers. The label in the center of the EPROM must never be removed.

B. EPROM REPLACEMENT FOR M60 AND M50 (NON-VANOS)

1. Lay the control module on a static mat. Remove the 4 screws (Torx T20) from the cover of the control module. See Fig 1 .
2. Carefully bend up the 6 tabs. See Fig 2 . Remove the plastic retaining pin using needle nose pliers.
3. Remove the cover from the control module. Remove the grounding screw from the PC board. See Fig 3 .
4. Carefully separate the upper and lower PC boards and raise the upper board. See Fig 4 .
5. With a small screwdriver, release the retaining clips located on the right and left side of the connector plug. See Fig 5 .

   Pull the upper circuit board out of the connector while applying a slight amount of downward pressure to the upper row of connector pins.

6. Once the upper board has been removed from the connector housing, fold the PC board back and lay the entire module on an anti-static mat.

   Remove the protective cap on the EPROM by inserting a small screwdriver into one of the slots on the side of the cap. See Fig 6 .

7. Pull the EPROM out of the socket carefully by using an extractor tool. See Fig 7 .
8. Reinstall new EPROM, making certain that:
   • All pins are straight.
   • The notch in the EPROM and the notch in the socket are aligned. See Fig 8 .
   • All pins have been inserted into the socket correctly and completely.
9. Reassemble control unit by:
   • Reinstalling EPROM cap.
   • Fold PC board over and insert back into connector housing.
   • Snap the upper and lower PC boards back together.
   • Install ground screw for upper board.
     NOTE: The ground screw must be reinstalled or incorrect operation of the DME may occur.
   • Place plastic sheet on top of PC board.
   • Carefully reinstall cover, making certain that none of the tabs on the cover come in contact with any of the pins on the PC board.
   • Bend all the tabs down.
   • Insert plastic retaining pin.
   • After the control module is programmed place a new identification label over the old label.
10. Place the fluorescent orange label which is identified as "BMW SERVICE ACTION" P/N 01 001 469 136 over the edge of the control module cover and bottom plate. See Fig 9 .
11. Discard the red label resembling a service action sticker supplied within each PROM package. See Fig 10 .

Fig 1: Control Module Cover Retaining Screws

Fig 2: Control Module Cover Tabs

Fig 3: Removing Control Module Cover

Fig 4: Separating Upper & Lower PC Boards

Fig 5: Releasing Connector Plug Retaining Clips

Fig 6: Removing EPROM Protective Cap

Fig 7: Removing EPROM From Socket

Fig 8: Installing EPROM

Fig 9: BMW Service Action Label On Control Module Cover

Fig 10: Red Label Supplied With EPROM Package

C. EPROM REPLACEMENT - M50 VANOS AND M42

1. Lay the control module on a static mat and carefully bend up the 6 tabs. See Fig 11 .
2. Remove the cover from the control module. See Fig 12 .
3. Remove the protective cap on the EPROM by inserting a small screwdriver into one of the slots on the side of the cap. See Fig 13 .
4. Remove EPROM by using extractor tool and carefully pulling out of its socket. See Fig 14 .
5. Reinstall new EPROM, making certain that:
   • All pins are straight.
   • The notch in the EPROM and the notch in the socket are aligned. See Fig 15 .
   • All pins have been inserted into the socket correctly and completely.
6. Reassemble control unit by:
   • Reinstalling EPROM cap.
   • Carefully reinstall cover, making certain that none of the tabs on the cover come in contact with any of the pins on the PC board.
   • Carefully bend the tabs down.

Fig 11: Control Module Cover Tabs

Fig 12: Control Module Cover

Fig 13: Protective Cap On EPROM

Fig 14: Removing EPROM From Socket

Fig 15: Installing EPROM