Inspection and Verification
WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
- Verify the customer concern by inspecting the vehicle and observing the message center (if equipped) and the TPMS indicator.
- Inspect to determine if one of the following mechanical or electrical concerns apply:
Visual Inspection Chart
VISUAL INSPECTION CHARTMechanical 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) damaged
- 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.
- If the cause is not visually evident, connect the scan tool to the Data Link Connector (DLC).
- 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 , 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 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 .
- 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 .
- If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART .
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.
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 set a TPMS
fault.
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 .
NOTE:
Non-OEM modifications made to the vehicle may result in false TPMS
warnings.
NOTE:
Make sure to use the latest scan tool software release.
NOTE:
The Vehicle Communication Module (VCM) LED prove out confirms power and ground from the DLC are provided to the VCM
.