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TSB 06-3-7

02/20/06

LOW TIRE INDICATOR ON - TPMS SYSTEM SENSOR WAKE UP

FORD:
2003-2006 Expedition, Explorer
2006 Escape Hybrid, Escape, Freestar

LINCOLN:
2003-2005 Aviator
2003-2006 Navigator

MERCURY:
2003-2006 Mountaineer
2006 Mariner Hybrid, Mariner, Monterey

ISSUE
Vehicles built with the tire pressure monitoring system (TPMS) sensors may experience a concern where the TPMS indicator is on solid and the message center (if equipped) displays "Low Tire Pressure". This may be due to the actual tire pressure being low due to time or temperature changes (10 ° = 1 psi). Adjusting the tire pressure to specification should turn out the warning light once the sensors have been awakened.

ACTION
If the vehicle has been stationary for more than 30 minutes, it will be necessary to wake up the sensors with the training tool to force them to transmit the latest air pressure information to the smart junction box (SJB), or responsible module. This can be done by either driving the vehicle for 2 minutes above 20 MPH (32 Km/h) or by using the training tool. The sensors do not continuously transmit when the vehicle is not moving.

NOTE
ADJUSTING THE TIRE PRESSURE IS NOT A WARRANTABLE ITEM.

SERVICE PROCEDURE
1. Inflate all tires to the correct air pressure.

2. Place the ignition in the RUN position.

3. Use special service tool 204-324 for valve-mounted TPMS sensors or 204-363 for wheel mounted sensors.

4. Place the magnet on each sensor for approx. 5 seconds or ping each sensor at least twice after adding air to ensure the module has the latest air pressure data.

5. If the TPMS indicator does not go off after filling the tires to the correct air pressure and pinging each sensor then refer to the appropriate Workshop Manual symptom chart.

WARRANTY STATUS: Information Only - Not Warrantable
 

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TSB: 02-003/06

2006 TRIBUTE

TIRE PRESSURE MONITORING SYSTEM (TPMS) INDICATOR LIGHT ON - TIRE PRESSURE SENSOR TRAINING PROCEDURE

APPLICABLE MODEL(S)/VINS
2006 Tribute vehicles equipped with Tire Pressure Monitoring System (TPMS)

DESCRIPTION
Mid-year 2006 Tribute models are equipped with a Tire Pressure Monitoring System (TPMS). The TPMS consists of a tire pressure sensor strapped inside each wheel, a Smart Junction Box (SJB) which monitors tire pressure, and the Instrument Cluster (IC) which illuminates the TPMS indicator light.

After replacing a TPMS sensor, the TPMS indicator light flashes, or is on continuously when the ignition is turned ON. These DTCs may be stored: B106A, B106B, B2477, B2868, B2869, B2870, B2871, B2872, C2780.

After replacement, TPMS sensors must be trained to be recognized by the SJB. The "Tire Pressure Monitor Test Tool" (SST 204-363-TPMS) is available to train new TPMS sensors.

NOTE:
If one (1) TPMS sensor is replaced, all four (4) sensors must be trained with the SST If it becomes necessary to replace the Smart Junction Box (SJB), all four (4) TPMS sensors will need to be retrained with the SST. If the SJB is replaced without completing PMI, DTC B2477 will be set. Contact Technical Assistance Hotline for SJB As-Built Data, which must be entered BEFORE training TPMS sensors.

TIRE PRESSURE MONITOR TEST TOOL TPMS INDICATOR LIGHTS

Slow Flashing Green LED: Tool is transmitting signal to TPMS sensor.
Rapid Flashing Green LED w/ Audible Tone: Tool is receiving from TPMS sensor.
Solid Green LED: Tool is in "repeat" mode and will allow the same type of sensor to be trained without pressing the test button again.

While holding tool against tire, press and release the "TEST" button to train the new TPMS wheel sensor.

TPMS TRAINING PROCEDURE
1. Inflate tire to recommended tire pressure.
NOTE
Pressure changes 1 PSI for every 10 degree Fahrenheit (6 degree Celsius) change in ambient temperature.


2. Wait two (2) minutes to allow new TPMS sensor to wake-up.

3. Turn ignition ON, then OFF.

4. Press and release brake pedal.

5. Turn ignition from OFF to ON three (3) times (ending in ON)
NOTE:
Perform key cycles within sixty (60) seconds.

6. Press and release brake pedal.

7. Turn ignition OFF.

8. Turn ignition from OFF to ON three (3) times (ending in ON)
NOTE:
Perform key cycles within sixty (60) seconds.

9. Horn will sound once and the TPMS indicator will flash when the training mode has been entered successfully.

10. At LF tire, hold SST against tire side wall 180 degrees opposite of valve stem.


11. Press and release "TEST" button.
^ If TPMS sensor has been trained, the horn will sound one (1) time.
^ Proceed to Step 12 and perform it in less than two (2) minutes.
^ If TPMS sensor has not been trained, roll the vehicle 1/4 wheel rotation and repeat Steps 10 - 11.


12. Repeat Steps 10 - 11 on other wheels in this order: RF, RR, LR.
If TPMS sensors were successfully trained, the TPMS light will go out.

13. Turn ignition OFF.
^ If TPMS sensors were successfully trained, the horn will not sound.
^ If TPMS sensors were not successfully trained, the horn will sound two (2) times. If this occurs, repeat Steps 3 - 13.

14. Run "ON DEMAND SELF TEST" on SJB and erase any DTCs.
 
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