Test I: The Heated Seat Is Inoperative - Passenger

PINPOINT TEST I: THE HEATED SEAT IS INOPERATIVE - PASSENGER

I1:

I2-I4:

I4-I5:

I6-I7:

I8-I10:

I10-I12:

I12-I13:

I14:

Normal Operation
The heated seat module is powered by battery and switched ignition voltage circuits 1048 (LB/WH) and 1040 (RD/BK). The heated seat is activated when the heated seat switch sends a ground signal to one of 2 input circuits into the heated seat module. Input circuits 581 (RD) and 1020 (DG/VT) activate HI or OFF. Input circuits 1256 (WH/YE) and 1255 (WH/RD) activate LOW or OFF. Once activated, the heated seat module supplies power and ground to the heater mat circuits 1064 (YE/LB) and 1065 (WH/LB) to heat the seat cushion and backrest. The heated seat module monitors circuits 1060 (BK/LB) and 1061 (BN/LB) from the temperature sensor in the cushion heater mat to maintain the seat temperature. The system will remain ON until the module times-out or is switched OFF.

Possible Causes
An inoperative passenger heated seat can be caused by:
- an open fuse.
- a faulty circuit.
- a faulty heated seat switch.
- a faulty heater mat.
- a faulty heated seat module.