How to use the EL-50448 relearn tool? Step 1 - Set the car to TPMS relearn mode. (The car will horn twice) Step 2 - Starting from the left front tire, press and hold the unit next to the valve, then press the white button and the horn will sound once. Step 3 - Follow this order to reset the TPMS one by one: Front Right, Rear Right, Rear Left Tire. After all sensors are reset, car angle twice means TPMS relearning is complete. How to put your car into TPMS restart mode? 1. Put the gear in the P position. 2. Use Cruise to select TPMS Relearn Mode in Dashboard Settings. 3. The horn will sound twice, the TPMS indicator will flash, and then the learning mode has been successfully entered. (If equipped, the message center will display the front left (LF) tire) 4. Before the tire pressure monitoring system works properly, the BCM will record the ID information for each location in the tire pressure sensor.
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