Diagnostic Aids
NOTE:
After each service or repair procedure has been completed, reconnect all components. Clear DTCs and repeat QUICK TEST procedures to ensure all electronic engine control systems are working properly and DTCs are no longer present.
Perform this test when directed by QUICK TEST. The FDCS circuit is the PCM output which 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. This test is only intended to diagnose the following components and circuits:
- Injector Driver Module
- Wiring Harness Circuit (FDCS)
- Powertrain Control Module (PCM)