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DDEC II Boot Mode

To recalibrate or program a DDECII ECM, connect the ECM to enter boot mode by connecting terminals B3, C1, C2, E1, F2, G3, and H3 to specific points - B3 to ignition, C1 and C2 to the J1708 data link, E1 to a 3.9k resistor to ground, and F2, G3, and H3 to ground. To read data from the ECM without recalibration, disconnect power and the E1, F2, G3, and H3 connections, wait 5 seconds, and reconnect power.

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Adderly Chinchero Torres
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860 views1 page

DDEC II Boot Mode

To recalibrate or program a DDECII ECM, connect the ECM to enter boot mode by connecting terminals B3, C1, C2, E1, F2, G3, and H3 to specific points - B3 to ignition, C1 and C2 to the J1708 data link, E1 to a 3.9k resistor to ground, and F2, G3, and H3 to ground. To read data from the ECM without recalibration, disconnect power and the E1, F2, G3, and H3 connections, wait 5 seconds, and reconnect power.

Uploaded by

Adderly Chinchero Torres
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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hi buddy, well to recalibrate or programing DDECII, the ecm should

stay in boot mode, to put the ecm in boot mode make the next bench
conecction....
B3 = Ignici?n
C1 = Data link J1708 (-)
C2 = Data link J1708 (+)
E1 = Connect one resistor of 3.9k to GND
F2, G3 y H3 = GND

remember this metod is to calibrate only, to read data from the


ecm disconecct the power, disconnect E1, F2, G3 and H3 wait 5
seconds then connect the power

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