• Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!

A25D code Ma2501-4

allen lafrance

Well-Known Member
Joined
Aug 17, 2018
Messages
96
Location
Quebec,Montreal
Occupation
mechanic
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
 

sfrs4

Senior Member
Joined
Jul 22, 2013
Messages
677
Location
Great Britian
Occupation
parts admin
is yours a D9 or D10 engine?
The attached is for testing the D9 engine
 

Attachments

  • A25D ma2501.pdf
    149.1 KB · Views: 7

sfrs4

Senior Member
Joined
Jul 22, 2013
Messages
677
Location
Great Britian
Occupation
parts admin
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
 

allen lafrance

Well-Known Member
Joined
Aug 17, 2018
Messages
96
Location
Quebec,Montreal
Occupation
mechanic
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
Thanks
 
Top