On-Board Diagnostic (OBD) with Scan Tool

WARNING: This page is about a different car, the 2011 Ford F550 Super Duty and 2011 Ford F450 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

These self-tests should be used to diagnose the PCM and should be carried out in order.

NOTE: Make sure to use the latest scan tool software release.

If the cause is not visually evident, connect the scan tool to the Data Link Connector (DLC).
NOTE: The Vehicle Communication Module (VCM) Light Emitting Diode (LED) prove-out confirms power and ground from the DLC to the VCM .
If the scan tool does not communicate with the VCM :
- check the VCM connection to the vehicle.
- check the scan tool connection to the VCM .
- refer to MODULE COMMUNICATIONS NETWORK article to diagnosis no power to the scan tool.
If the scan tool does not communicate with the vehicle:
- verify the ignition is in the ON position.
- verify scan tool operation with a known good vehicle.
- refer to MODULE COMMUNICATIONS NETWORK article to diagnosis no response from the PCM.
Carry out the network test. If the scan tool responds with no communication from one or more modules, refer to MODULE COMMUNICATIONS NETWORK article. If the network test passes, read and record the continuous memory DTCs.
Clear the continuous DTCs and carry out the PCM self-test.
If DTCs are related to the concern, go to the DTC CHART in this service information.
If DTCs are not related to the concern, refer to DIAGNOSIS BY SYMPTOM in this service information.