Santa Fe FWD V6-2.7L (2007)
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Activates LFI for TPMS sensor location.
LFI (LOW FREQUENCY INITIATOR)
1. Overview
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Only High Line systems are fitted with an LFI.
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The LFI is located in the wheel well of each tire, to enable the receiver to determine the vehicle position of each TPMS sensor for which it has
a stored TPMS sensor ID code.
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When first turned on, the receiver activates the LFI's to wake up the TPMS sensors and get wheel status.
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The LFI's are activated every 10 minutes to keep the TPMS sensors awake while the key is on.
2. Operating mode
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When triggered by the receiver the LFI broadcasts a 125 KHz signal through the tire to the TPMS sensors to wake them up sequentially.
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After broadcasting the LFI returns to sleep mode until triggered again by the receiver.
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Once the TPMS sensor has received the 125 KHz wake up signal, it broadcasts it's ID and status. This information plus which LFI triggered it
allows the receiver to record which tire has which sensor.
OPERATION
1. Type 1 learn mode
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TPMS sensor learning via Mine diagnostic bus using TPMS Exciter.
2. Type 2 learn mode
