Pinpoint Test T: Fuel Delivery Command Signal: Description
Perform this test when directed here by QUICK TEST . FDCS controls fuel injection timing and controls fuel quantity with Injection Pressure Regulator (IPR). This signal is sent with Cylinder Identification (CID) signal to Injector Driver Module (IDM) which provides power and distributes proper signal to appropriate injector. DTC 1663 indicates FDCS circuit failure.
This pinpoint test is intended to diagnose:
- Injector Driver Module (IDM).
- Wiring harness circuit; (FDCS).
- Powertrain Control Module (PCM).