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Home >> Ford >> 2000 >> Contour SE, 2.0 3, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2542 (Seat System - Seats) >> Diagnostic Tests >> Seats >> Pinpoint Tests >> Pinpoint Test I: The Heated Seat is Inoperative - Driver >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.

The driver heated seat module receives voltage feed on circuit 1048 (LB/WH) and ignition voltage feed on circuit 1040 (RD/BK), and is supplied ground on circuit 676 (PK/OG). When the heated seat control switch is pressed with the ignition switch in RUN or START, a ground signal is sent to the heated seat module on circuit 1020 (DG/VT) to command the system ON or OFF in HI heat mode or circuit 1255 (WH/RD) to command the system ON or OFF in LOW heat mode. When commanded ON, a ground signal is supplied to the heated seat switch from the heated seat module on either circuit 1019 (TN/LB) (HI heat mode) or circuit 1018 (LG/OG) (LOW heat mode) illuminating the switch indicator. The heated seat module also supplies voltage to the cushion and backrest heater mats on circuit 1064 (YE/LB) and ground to the heater mats on circuit 1065 (WH/LB). The cushion and backrest heater mats are connected in series and operate together. Temperature is maintained by the heated seat module using a sensor contained within the cushion heater mat. The heated seat module supplies a reference voltage to the temperature sensor on circuit 1060 (BK/LB) and monitors the return signal from the temperature sensor on circuit 1061 (BN/LB) for adjusting the current flow to the heater mats. The heated seat module is designed to remain ON, heating the seat and maintaining temperature until switched OFF or the time-out period occurs.

This pinpoint test is intended to diagnose the following:

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