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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 679 (Engine Controls - Diagnostic Methods -- Diesel 6.0L (99P E-Series & 99P F450/550)) >> Intermittent Diagnostic Techniques >> Analyzing PCM Data >> Change Input and Verify Output Response

Change Input and Verify Output Response

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The purpose is to verify how the PCM and actuator circuit respond to sensor input.

  1. Access, monitor, and record the appropriate sensor PID(s).
  2. Create the condition or cause the input condition to change.
  3. Monitor any change (response) in the actuator PID or actuator signal circuit with a measuring device.

    Example:

    • Increase the accelerator pedal position under no load, and observe the RPM DSD PID and circuit change