Test O: The Heated Seat Is Inoperative/Does Not Operate Correctly - Passenger

PINPOINT TEST O: THE HEATED SEAT IS INOPERATIVE/DOES NOT OPERATE CORRECTLY - PASSENGER

Normal Operation
The heated ventilation air conditioning (HVAC) module contains the driver heated seat control button and indicator. The heated seat system functions independently from the climate control system. A heated seat relay is located underneath the driver seat cushion frame. There are 2 voltage supplies to the heated seat relay. Voltage is supplied from the smart junction box (SJB) heated seat relay enable circuit CBP42 (GN) to the passenger heated seat relay coil when the engine is running. Ground is supplied to the opposite side of the passenger relay coil by the HVAC module passenger heated seat relay drive circuit CHS30 (GY/YE) when the driver heated seat switch button is pressed to energize the relay. This closes the relay contacts to supply battery voltage from the SJB circuit SBP18 (YE/RD) to the passenger heater mat circuit CHS07 (GY/BU). The passenger heater mats are directly connected to ground circuit GD179 (BK/VT) completing the electrical circuit to heat the seat. The system will time out and deactivate after 10 minutes.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Heated seat relay
- Heater mat
- HVAC module

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O3-O5:

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