Mark LT 2WD V8-5.4L (2008)
Tire Pressure Sensor: Testing and Inspection
Tire Pressure Monitoring System (TPMS) Sensor Training
Tire Pressure Monitoring System (TPMS) Sensor Training
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 vehicle security module (VSM). Refer to Tire Pressure
Monitoring System (TPMS) Sensor Activation. See: Testing and Inspection/Programming and Relearning
NOTE: The tire pressure sensor training procedure must be done on a single vehicle, in an area without radio frequency noise and at least 1 m (3 ft)
away from other vehicles equipped with tire pressure monitor system (TPMS). Radio frequency noise is generated by electrical motors and appliance
operation, cellular telephones, remote transmitters, power inverters and portable entertainment equipment.
NOTE: If a sensor does not respond to the activation tool, 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.
NOTE: The VSM has a 2 minute time limit between sensor responses. If the VSM does not recognize any 1 of the 4 tire pressure sensors during this
time limit, the horn will sound twice and the message center (if equipped) will display TIRE NOT TRAINED REPEAT and the entire procedure must
be repeated.
NOTE: For vehicles with different front and rear tire pressures (such as E-Series and certain F-Series), the tire pressure must be adjusted and the tire
pressure sensors must be trained following a tire rotation. Failure to train the sensors will cause the TPMS indicator to illuminate. For vehicles with
the same tire pressures for front and rear tires, tire rotation will not affect the system.
1. NOTE: Click here to view an animated version of this procedure.
Turn the ignition switch to the OFF position, then press and release the brake pedal.
2. Cycle the ignition switch from the OFF position to the RUN position 3 times, ending in the RUN position.
3. Press and release the brake pedal.
4. Turn the ignition switch to the OFF position.
5. Turn the ignition switch from the OFF position to the RUN position 3 times, ending in the RUN position.
^
The horn will sound once and the TPMS indicator will flash if the training mode has been entered successfully. If equipped, the message center
will display TRAIN LF TIRE.
6. NOTE: It may take up to 6 seconds to activate a tire pressure sensor. During this time, the activation tool must remain in place 180 degrees from
the valve stem.
Place the activation tool on the LF tire sidewall opposite (180 degrees) from the valve stem.
Press and release the test button on the special tool. The horn will sound briefly to indicate that the tire pressure sensor has been recognized by the
VSM. Click here to view an animated version of this procedure.
