Home » International DT466 » International DT466 – ENGINE SYSTEMS – Electronic Control System – IDM and Injector Diagnostics

International DT466 – ENGINE SYSTEMS – Electronic Control System – IDM and Injector Diagnostics

The IDM determines if an injector is drawing enough current. The IDM sends a fault to the ECM, indicating
potential problems in the wiring harness or injector, and the ECM will set a DTC. The IDM also does
self-diagnostic checks and sets a DTC to indicate failure of the IDM.

On demand tests can be done using the Electronic Service Tool (EST). The EST sends a request to the
ECM and the ECM sends a request to the IDM to do a test. Some tests generate a DTC when a problem
exists. Other tests require the technician to evaluate parameters, if a problem exists.