Preliminary Checks
NOTE:
Vehicles equipped with the heated seat option utilize a low voltage cut-off feature. This feature turns off power to the heated seat system anytime vehicle voltage is below 11.7V or above 15.5V. Be certain to check the vehicle electrical system for proper voltage anytime the power seat system appears inoperative.
Before testing the individual components in the heated seat system, check the following:
- Check the vehicles battery open-circuit voltage and charging system performance. If the vehicle's electrical system is defective or weak it may not be suppling sufficient energy to operate the heated seat system.
- Using a diagnostic scan tool, check for any heated seat system related Diagnostic Trouble Codes (DTCs). Record these codes on paper for reference and resolve using the Appropriate Diagnostic Information.
- If the front heated seat system functions properly but the heated seat switch HI/LO LED indicators do not light with the ignition switch in the ON position and the heated seat switch in the low or high position, check the fused ignition switch fuse in the power distribution center. If OK, replace the HVAC control assembly. If not OK, repair the shorted circuit or component as required and replace the inoperative fuse.
- If the 2nd row heated seat system functions properly but the heated seat switch HI/LO LED indicators do not light with the ignition switch in the ON position and the heated seat switch in the low or high position, check the fused ignition switch fuse in the power distribution center. If OK, replace the suspect heated seat switch. If not OK, repair the shorted circuit or component as required and replace the inoperative fuse.