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Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 395 (Handles, Locks, Latches And Entry Systems) >> Diagnosis And Testing >> Locks, Latches and Entry Systems >> Symptom Chart >> Pinpoint Test I: The Doors Do Not Lock/Unlock Using The Keyless Entry (RKE) Keypad >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

The smart junction box (SJB) sends voltage reference signals to the RKE keypad through circuits 78 (LB/YE), 79 (LG/RD), 121 (YE/BK). When the buttons are pressed on the keypad, one or more of the signals are routed to ground through circuit 570 (BK/WH). Depending on the signals received, the SJB is able to determine which button is pressed. When a correct code has been entered, the SJB operates the locks accordingly.

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