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Home >> Lincoln >> 2011 >> MKS EcoBoost >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Seat System - Seats >> Diagnosis And Testing >> Seats >> Pinpoint Tests >> Pinpoint Test J: The Power Lumbar is Inoperative - Passenger >> Normal Operation

Normal Operation

The passenger seat control switch is supplied battery voltage on circuit CBX05 (VT/RD) and is supplied ground on circuit GD903 (BK/WH). When the lumbar knob on the seat control switch is pressed for the lumbar to move in and out, voltage and ground are supplied to the in/out power lumbar motor. When pressing the switch in the opposite direction, voltage polarity to the in/out power lumbar motor is reversed, moving the lumbar assembly in the opposite direction. When the lumbar knob on the seat control switch is pressed for the lumbar to move up and down, voltage and ground are supplied to the up/down power lumbar motor. When pressing the switch in the opposite direction, voltage polarity to the up/down power lumbar motor is reversed, moving the lumbar assembly in the opposite direction.

This pinpoint test is intended to diagnose the following: 

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