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Home >> Ford >> 2013 >> Fiesta Titanium, 4D Hatchback, Standard Trans >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Seat System - Seats >> Diagnosis And Testing >> Seats >> Pinpoint Tests >> Pinpoint Test A: The Heated Seats are Inoperative - Driver and Passenger Seats >> Normal Operation

Normal Operation

The heated seat system only operates when the engine is running. When the driver or passenger heated seat switch (located on the instrument panel) is activated, it supplies a ground signal to the Body Control Module (BCM). When the BCM receives the heated seat switch signal, it activates the appropriate (driver or passenger) heated seat relay (located in the Central Junction Box (CJB). When the heated seat relay is activated, voltage is supplied to the cushion heater mat. The cushion heater mats are directly connected to ground to complete the electrical circuit to heat the seat.

This pinpoint test is intended to diagnose the following: 

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