Symptom Chart

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: For vehicles with different front and rear tire pressure (such as E-Series and certain F-Series), the tire pressures must be adjusted and the tire pressure sensors must be trained following a tire rotation. Failure to train the sensors will result in a false low tire pressure event, which will cause the Tire Pressure Monitoring System (TPMS) indicator to illuminate.

For vehicles with the same tire pressure for front and rear tires, tire rotation will not affect the system.

Failure of a TPMS component may not cause the message center to display a fault message or a DTC to be stored. The Symptom Chart is a starting point to begin diagnosis of these concerns.

Symptom Chart

Condition	Possible Sources	Action
Tire Pressure Monitoring System (TPMS) indicator ON solid and message center (if equipped) displays LOW TIRE PRESSURE	Spare tire currently in use	INSTALL the repaired road wheel/tire in place of the spare tire.
	Air pressure not set to specifications listed on the Vehicle Certification (VC) label	Go to Pinpoint Test D .
	Sensors not trained following tire rotation	ADVISE customer that on vehicles with different front and rear tire pressure, the sensors must be trained as directed in their Owner's Literature.
Smart Junction Box (SJB) will not enter sensor training mode when using the TPMS sensor training procedure	Brake ON/OFF switch Ignition switch Vehicle communication bus SJB	Go to Pinpoint Test E .
TPMS indicator FLASHES for 70 seconds and then remains ON solid when the ignition key is turned to the ON position, the message center (if equipped) displays TIRE PRESSURE SENSOR FAULT and DTC B2872 is present	TPMS sensor(s) TPMS sensor(s) not trained to the SJB SJB	NOTE: If the vehicle has been stationary for more than 30 minutes, the sensors will go into a "sleep mode" to conserve battery power. It will be necessary to wake them up so they will transmit the latest tire pressure information to the SJB. ACTIVATE the TPMS sensors. REFER to Tire Pressure Monitoring System (TPMS) Sensor Activation . Go to Pinpoint Test F .
TPMS indicator FLASHES for 70 seconds and then remains ON solid when the ignition key is turned to the ON position, the message center (if equipped) displays TIRE PRESSURE MONITOR FAULT and DTC B287A is present	All TPMS sensors not trained to the SJB or all TPMS sensors are not installed	NOTE: If the vehicle has been stationary for more than 30 minutes, the sensors will go into a "sleep mode" to conserve battery power. It will be necessary to wake them up so they will transmit the latest tire pressure information to the SJB. ACTIVATE the TPMS sensors. REFER to Tire Pressure Monitoring System (TPMS) Sensor Activation . Go to Pinpoint Test F .
TPMS indicator FLASHES for 70 seconds and then remains ON solid when the ignition key is turned to the ON position, the message center (if equipped) displays TIRE PRESSURE MONITOR FAULT and there are no DTCs present	Vehicle communication issue between the SJB and the instrument cluster	REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the no communication concern.
	SJB	REFER to MULTIFUNCTION ELECTRONIC MODULES article to diagnose the SJB.
One or more sensors will not train	TPMS sensor(s) Vehicle communication issue SJB	RETRIEVE and RECORD DTCs. REFER to Tire Pressure Monitoring System (TPMS) DTC Chart.
One or more sensors will not train and no DTCs are present	TPMS sensor(s)	TRAIN all 4 tire pressure sensors. REFER to Tire Pressure Monitoring System (TPMS) Sensor Training . For any sensor(s) that did not train, ATTEMPT to activate the same sensor with the activation tool. If the sensor still does not respond, MOVE the vehicle to rotate the wheels at least 1/4 of a turn and ATTEMPT to activate the same sensor again. If the sensor(s) fail to train a second time, INSTALL a new sensor(s). REFER to Tire Pressure Monitoring System (TPMS) Sensor .