Heated Seat Module-2nd Row Seats

HEATED SEAT MODULE - 2ND ROW SEATS

If a heated seat fails to heat and one or both of the Light Emitting Diode (LED) indicator lamps on a heated seat switch flash, Testing and Inspection for flashing LED heated seat system diagnosis and testing procedures. If a heated seat heats but one or both LED indicator lamps on the heated seat switch fail to operate, test the heated seat switch. Heated Seat Switches - 2nd Row Seats, for heated seat switch diagnosis and testing procedures. If the heated seat switch checks OK, proceed as follows.

1. Check the heated seat element Heated Seat Element - Diagnosis and Testing.
2. Check the heated seat sensor Testing and Inspection.
3. Check the heated seat switch Driver Heated Seat Switch.

NOTE: Refer to Diagrams/Electrical for the location of complete heated seat system wiring diagrams and connector pin-out information.

4. Using a voltmeter, backprobe the Heated Seat Module (HSM) connector, do not disconnect. Check for voltage at the appropriate pin cavities. 12v should be present. If OK go to STEP 5, if Not, Repair the open or shorted voltage supply circuit as required.
5. Using a ohmmeter, backprobe the HSM connector, do not disconnect. Check for proper continuity to ground on the ground pin cavities. Continuity should be present. If OK replace the HSM. If Not OK, Repair the open or shorted ground circuit as required.