H8 ECUs

1998 DSM

Production Dates -> 7/97-5/98

FWD Ecu Part # -> MD346675
FWD ROM Id -> EM2055

AWD Ecu Part # -> MD346676
AWD ROM Id -> EM2056

PCB Code: JE331B156C

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1999 DSM

Production Dates -> 6/98-4/99

FWD Ecu Part # -> MD359402
FWD ROM Id -> EM2363

AWD Ecu Part # -> MD359403
AWD ROM Id -> EM2364

PCB Code: JE331B156D

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Pictures

1999 DSM ECU Front PCB

1999 DSM ECU Front PCB

1999 DSM ECU Rear PCB

1999 DSM ECU Rear PCB

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Notes

All DSM Turbo Ecus are compatible Flash wise.
A 98 ROM can be Flashed to a 99 Ecu, and vice versa.
Also a GST ROM can be Flashed to a GSX ECU, and vise versa.

98-99 Spyder Ecus are compatible Flash wise.
The only hardware difference with the Spyder Ecus, is the Fuel Pump Pin.
The Spyders output +5v to turn on the Fuel Pump Module.
While the DSM pull +12v to ground to turn on the Fuel Pump Relay.

Testing so far has revealed that all Ecus with the same PCB Code are compatible, Flash wise.
The Evo5/6 are not compatible(different PCB Code), and Flashing an Evo image to a DSM Ecu will brick it.
(Don’t ask how I know)

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PCB Code Database

(Unless noted CPU is MH7202F)


  • JE331B153D

    • Evo6 GSR

  • JE331B156C

    • 1998 Eclipse/Talon
    • 1998 Eclipse Spyder

  • JE331B156D

    • 1999 Eclipse/Talon
    • 1999 Eclipse Spyder
    • 1999 Mirage LS

  • JE331B33702B

    • Evo6 TME
      • MH7203FA CPU