1997 PCED OBDII-Diesel
SECTION 5C: Pinpoint Tests
U: IDM Electronic Feedback (EF)
Introduction
  U: Pinpoint Tests  

Note

Enter this pinpoint test only when directed here from the symptom flowcharts.

Remember

This pinpoint test is intended to diagnose only the following:

Description The IDM provides the EF output signal to the PCM to confirm that proper timing/duration of fuel delivery command signal (FDCS) was received. Additionally, the EF signal is used to send diagnostics of the IDM and injectors (electrical) to the PCM.





DTC Description

P1668 = PCM-IDM diagnostic communication error

P1670 = Electronic feedback signal not detected

P1316 = Indicates that IDM DTC's are stored within the IDM.

 

 

  U: Pinpoint Tests