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A25D code Ma2501-4

Discussion in 'Off Road Haul Trucks' started by allen lafrance, Aug 24, 2022.

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  1. allen lafrance

    allen lafrance Well-Known Member

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    Hi i have this code MA2501-4 some one can help me thanks
     
  2. allen lafrance

    allen lafrance Well-Known Member

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    Exhaust gas brake i dont know what is fmi 4 but I test 3 wire on it and 2 wire coming from ecu give me 12v ~!? And the last is mass i think fuse and relay ok
     
  3. sfrs4

    sfrs4 Senior Member

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    is yours a D9 or D10 engine?
    The attached is for testing the D9 engine
     

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  4. allen lafrance

    allen lafrance Well-Known Member

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    Yes its a D9 and the fmi is 4
     
  5. allen lafrance

    allen lafrance Well-Known Member

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    We do continuity to ecm and all good but ecm keep give 12v only
     
  6. sfrs4

    sfrs4 Senior Member

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    PWM valve, exhaust brake pressure, voltage too low
    SAE code: MID 128 PPID 124 FMI 4
    Conditions:
    The engine control unit (E-ECU) registers:
    ○ component not activated
    ○ voltage too low (EB38)
    Possible cause:
    ○ Signal line short-circuited to frame ground
    Reaction from control unit:
    ○ 1F2501, activation engine brake (EMS)
    Symptom/malfunction:
    ○ Low power
    ○ Heavy exhaust smoke development
    ○ Component continuously activated
     
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  7. allen lafrance

    allen lafrance Well-Known Member

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    Thanks