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Re: VT-365 IDM Module Fault Code *M
Posted to HD/Fleet Forum on 4/29/2011 7 Replies

Straight from international themselves:

DTC 525 IDM fault

DTC 525 is set by the ECM when there is an internal IDM failure. When DTC 525 is set, replace the IDM. When DTC 525 is active the amber ENGINE lamp is illuminated.

I clear the code and drive it if... Login to read more.

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