Pinpoint Test U: Injector Driver Module Feedback: Description
WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 1996 Ford RV Cutaway, 1996 Ford Pickup, 1996 Ford F-Super Duty, 1996 Ford Econoline, and 1996 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
Injector Driver Module (IDM) provides EF output signal to PCM to confirm that proper timing and duration of Fuel Delivery Command Signal (FDCS) was received. Additionally, EF signal is used to send diagnostics of IDM and injectors (electrical) to PCM. DTC 1668 indicates PCM-IDM diagnostic communication error.
Perform this test when directed here by QUICK TEST. This pinpoint test is intended to diagnose:
- Injector Driver Module (IDM).
- Wiring harness circuit (EF).
- Powertrain Control Module (PCM).