2007 Mercury Mariner TPMS Reset Help

[culater9]

The tire shop replaced all the sensors on my car (2 were dead and I said to go ahead and replace the other 2), however, they can't get the system to reset. Does anyone have any ideas?

[TPMS Guru]

Here is the relearn procedure:

1. Inflate all tires to pressure listed on tire placard
2. Turn ignition to OFF position and press and release brake pedal.
3. Cycle ignition from OFF to RUN position 3 times, ending in RUN position.
4. Press and release brake pedal.
5. Turn ignition to OFF position.
6. Cycle ignition from OFF to RUN position 3 times, ending in RUN position.
7. Horn will sound once and TPMS telltale will blink once train mode is initiated. If equipped with message center, it will display TRAIN LF TIRE. Place antennae of learn tool on sidewall of LF tire 180 degrees from valve stem to activate sensor. Horn will sound once sensor has been recognized, Repeat step for RF, RR, and LR tires.
8. After training LR tire the message center will display TRAINING MODE COMPLETE. If the vehicle is not equipped with the message center display, successful completion can be verified by turning the ignition to the OFF position and not hearing the horn sound. If the horn sounds, the training procedure must be repeated.