Replacement Of REX/REGINA Control Modules (GROUP 28, NO. 710)

COMBINING CONTROL MODULES OF DIFFERENT VERSIONS

Control module versions are matched to each other a fact which must be taken into account when replacing a fuel injection or ignition module. It is important to ensure that the correct ICM is utilized when replacing the MFI control module and vice-versa. The following table shows the possible control module combinations and the measures which must be implemented to ensure satisfactory operation of the systems.

CONSEQUENCES OF MODIFICATIONS

• On completion of the above measures the cold-start valve will remain installed but will not function.
• Information that the A/C compressor is switched in will no longer be shown by the Volvo System Tester under "Monitor test".

Whenever older vehicles are updated with the latest programming, it is important to ensure that the throttlebody is adjusted to specification as per SB 25-704 Section 1.1 - 1.5.

REPLACEMENT OF FUEL INJECTION CONTROL MODULE AND MODIFICATION OF WIRING

1. Record any fuel injection and ignition system diagnostic trouble codes (DTC) and correct faults as required.
2. Remove/disconnect the battery ground lead, front screw in sill protector (1) and cover over MFI control module (2). See Fig 1 .
   Fig 1: MFI Control Module Cover & Screw

   
   NOTE: Module must be dead when connector is removed or reconnected otherwise damage may result. Remove Fuse #1 to avoid damage to control modules.
3. Disconnect 35-pin connector from module. See Fig 2 .
   Fig 2: Removing Connector Protective Cover

   
4. Cut tie securing rubber protector and fold aside protector.
5. Remove protective cover from connector.
6. Modify 35-pin connector as follows:
   1. Remove grey-black (GR-SB) lead from position 32 in connector.
   2. Cut lead 1-3/4" from connector entry as illustrated in Fig 3 .
      Fig 3: Cutting Grey-Black (GR-SB) Lead

      
   3. Remove green-yellow (GN-Y) lead from position 15 in connector.
   4. Cut lead 3-1/4" from connector entry as illustrated in Fig 4 .
      Fig 4: Cutting Green-Yellow (GN-Y) Lead

      
   5. Remove green-red (GN-R) lead from position 14 in connector and insert in position 15.
      CAUTION: Remove lead carefully to avoid damage to terminal.
7. To insulate ends of the grey-black and green-yellow leads, crimp splicing sleeves P/N 956958-3, onto uncut ends. See Fig 5 .
   Fig 5: Insulating Lead Ends

   
   NOTE: Do not strip ends and ensure that sleeves are securely crimped in position. Replace protective cover over connector. Bend rubber protector back into position and secure with new cable tie. See Fig 6 .
   Fig 6: Installing Connector Plastic Cover

   
8. Compare part number on MFI control module in car with numbers in table.
9. Replace module if number does not agree with P/N specified in table.
10. Apply grease P/N 1161417-9 into terminal sleeves of connector.
11. Reconnect connector to module
12. Reinstall cover over control module (2) and screw in sill protector (l). See Fig 7 .

Fig 7: Installing MFI Control Module Cover & Screw

INSPECTION/REPLACEMENT OF IGNITION CONTROL MODULE (ICM)

1. Remove knee bolster and reinforcing plate on driver's side. See Fig 8 . Check label on module. See Fig 9 .
   Fig 8: Removing Knee Bolster And Reinforcing Plate

   
   Fig 9: Control Module Location

   
2. Compare part number on label with numbers in table. Replace module if number does not agree with P/N specified in table.
   NOTE: Module must be dead when connector is removed or reconnected otherwise damage may result. Remove Fuse #1 to avoid damage to control modules.
3. Properly reinstall knee bolster and reinforcing plate.
4. Reconnect battery ground lead on completion of work. Clear codes (if any) in fuel and ignition systems.
5. Test-drive car. Display new codes (if any) and correct as required.

REGINA FUEL INJECTION SYSTEM (B230F) WIRING DIAGRAM

Refer to Fig 10 .

Fig 10: Regina Fuel Injection System (B230F) Wiring Diagram