Inspection and Verification

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.

NOTE: The tire pressure sensors are not designed to be used with aftermarket wheels.

NOTE: The use of run-flat tires (tires with steel body cord plies in the tire sidewall) where not originally equipped, may cause the TPMS to malfunction and is therefore not recommended.

Verify the customer concern by inspecting the vehicle and observing the message center (if equipped) and the TPMS indicator.

NOTE: The valve-mounted TPMS sensors and the strap-mounted TPMS sensors are not compatible. Swapping wheels from one vehicle to another with the different systems will adversely affect TPMS operation.

NOTE: Swapping wheels between vehicles with the same TPMS will cause a TPMS fault to be set if the sensors are not trained. Refer to TIRE PRESSURE MONITORING SYSTEM (TPMS) SENSOR TRAINING in this service information.

NOTE: Non-OEM modifications made to the vehicle may result in false TPMS warnings.

Inspect to determine if one of the following mechanical or electrical concerns apply:

VISUAL INSPECTION TABLE

Mechanical	Electrical
Low tire pressure Tire Pressure Monitoring System (TPMS) sensor damaged or missing Spare tire installed as a road wheel Incorrect TPMS sensor installed TPMS sensor installed incorrectly Sensors not trained after a tire rotation on vehicles with different front and rear tire pressures Non-OEM wheels installed (aftermarket rims) Non-OEM equipped run-flat tires installed Other non-OEM modifications (roll cages, service barriers, part racks, ladder racks)	Wiring, terminals or connectors Smart Junction Box (SJB) Aftermarket electronic accessories

Mechanical

Electrical

Low tire pressure
Tire Pressure Monitoring System (TPMS) sensor damaged or missing
Spare tire installed as a road wheel
Incorrect TPMS sensor installed
TPMS sensor installed incorrectly
Sensors not trained after a tire rotation on vehicles with different front and rear tire pressures
Non-OEM wheels installed (aftermarket rims)
Non-OEM equipped run-flat tires installed
Other non-OEM modifications (roll cages, service barriers, part racks, ladder racks)

Wiring, terminals or connectors
Smart Junction Box (SJB)
Aftermarket electronic accessories

If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.

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) LED prove out confirms power and ground from the DLC are provided 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 -- FUSION, MILAN & MKZ article, No Power To The Scan Tool, to diagnose no power to the scan tool.
If the scan tool does not communicate with the vehicle:
- verify the ignition key is in the ON position.
- verify the scan tool operation with a known good vehicle.
- refer to MODULE COMMUNICATIONS NETWORK -- FUSION, MILAN & MKZ article to diagnose no response from the PCM.
Carry out the network test.
- If the scan tool responds with no communication for one or more modules, refer to MODULE COMMUNICATIONS NETWORK -- FUSION, MILAN & MKZ article.
- If the network test passes, retrieve and record Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Clear the CMDTCs and carry out the self-test diagnostics for the SJB (the TPMS is part of the SJB).
If the DTCs retrieved are related to the concern, go to the TIRE PRESSURE MONITORING SYSTEM (TPMS) DTC CHART . For all other DTCs, refer to the Master DTC Chart in MULTIFUNCTION ELECTRONIC MODULES -- FUSION, MILAN & MKZ article.
If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART .