Test H: The Heated Seat Is Inoperative - Driver

PINPOINT TEST H: THE HEATED SEAT IS INOPERATIVE - DRIVER

H1-H2:

H2-H4:

H4-H5:

H6-H8:

H8-H10:

H10-H11:

H12-H14:

H14-H16:

H16-H18:

H18-H19:

Normal Operation
The driver and passenger heated seat modules share a common battery and ignition feed and have a separate ground source. The electronic automatic temperature control (EATC) module includes the heated seat control buttons and indicators. The heated seat system will function when the EATC module is ON or OFF. When a heated seat control button on the EATC module is pressed with the ignition switch in RUN or START, a momentary ground signal is sent to the heated seat module. Upon receiving a signal, the heated seat module will decrease one setting (the sequence is HI, LO, OFF, HI, etc.). When the heated seat system is ON, the heated seat module then supplies power to the heating element circuit. The cushion element and backrest element are wired in series and powered by the same output. The heated seat module will remain ON until the heated seat control button is pressed to cycle the heated seat module to the OFF state. If the ignition source is removed from the module, the heated seat module will enter an OFF state and will not return to ON until the heated seat control button is once again pressed with the ignition switch in RUN.

Possible Causes
An inoperative heated seat can be caused by:
- open fuse.
- wiring, terminals or connectors.
- a faulty heated seat element.
- a faulty heated seat module.
- a faulty EATC module.