Test A: The Heated Seats Are Inoperative - The Heated Seat Indicators Illuminate But Neither Seat Heats

PINPOINT TEST A: THE HEATED SEATS ARE INOPERATIVE - THE HEATED SEAT INDICATORS ILLUMINATE BUT NEITHER SEAT HEATS

Normal Operation
Each front seat has a heated seat relay mounted to the seat track. There are 2 voltage supplies to the heated seat relay. When the ignition switch is ON, voltage is supplied from the smart junction box (SJB) to each heated seat relay coil through heated seat relay enable circuit CHS25 (YE). When the engine is running and the driver or passenger heated seat button is pressed to on, ground is supplied to the opposite side of the driver or passenger relay coil by HVAC module driver heated seat relay drive circuit CHS29 (WH/BU) or passenger heated seat relay drive circuit CHS30 (GY/YE) to energize the affected relay. The switch indicators can only be illuminated with the engine running. The relay contact closes to supply battery voltage from SJB circuit CHS02 (YE/BU) to the driver heater mat circuit CHS11 (VT/GN) or passenger heater mat circuit CHS07 (GY/BU). The driver heater mats are connected to ground circuit GD906 (BK/GY) and the passenger heater mats are connected to ground circuit GD905 (BK/GN) completing the electrical circuits to heat the seats.

This pinpoint test is intended to diagnose the following:
- Fuse(s)
- Wiring, terminals or connectors
- HVAC module

A1-A4:

A4-A5:

A5 Continued: