Pinpoint Test Ad: DTC U0100:00
WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
- AD1 CHECK FOR LOST COMMUNICATION DTCs
- Ignition ON.
- Clear continuous DTCs from all modules.
- Ignition OFF.
- Ignition ON.
- Wait at least 10 seconds.
- Retrieve all continuous DTCs from all modules.
- Is DTC U0100 or DTC U0100:00 set in any modules?
- Yes : GO to AD2.
- No : The system is operating correctly at this time. The DTC may have been set due to an intermittent fault in the network wiring.
- AD2 CHECK FOR BATTERY VOLTAGE OUT-OF-RANGE DTCs
- Carry out the self-test for the following modules:
- APIM
- PCM
- Instrument Panel Cluster (IPC)
- Is DTC B1317, B1318, U3003:16, or U3003:17 recorded in any module?
- Yes : For the APIM, REFER to DTC CHARTS in this service information. For all other modules, REFER to the master list in MULTIFUNCTION ELECTRONIC MODULES -- FUSION, MILAN & MKZ article.
- No : GO to AD3.
- Carry out the self-test for the following modules:
- AD3 CHECK FOR DTC U0100 OR DTC U0100:00 SET IN MULTIPLE MODULES
- Review the recorded results from the self-test.
- Is DTC U0100 or DTC U0100:00 set in more than one module?
- Yes : GO to AD4.
- No
: If there is an observable symptom, GO to SYMPTOM CHART - GENERAL AUDIO SYSTEM to diagnose the observed symptom.
If there is no observable symptom, CHECK the wiring between the APIM and the PCM for an intermittent fault.
- AD4 CHECK FOR CORRECT PCM OPERATION
- Disconnect all the PCM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the PCM connectors and make sure they seat correctly.
- Is the concern still present?
- Yes : INSTALL a new PCM. Refer to the appropriate Electronic Engine Controls article for the procedure. CLEAR all continuous DTCs. REPEAT the APIM self-test.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR all continuous DTCs. REPEAT the APIM self-test.