Seat Temperature Element: Testing and Inspection

HEATED SEAT SYSTEM
Refer to Wiring Diagrams for the location of complete heated seat system wiring diagrams. Before testing the individual components in the heated seat system, perform the following preliminary checks:

- If the heated seat switch numerals (1-6) do not illuminate with the ignition switch in the ON position and the heated seat switch in 1-6 positions, check the fuse that supplies the switches in the junction block. If the fuse checks OK, test the heated seat switch.

- If the heated seat switch numerals (1-6) illuminate, but the heating elements do not heat, check the low voltage cut-out relay in the PDC. If the relay checks OK, test the seat heating elements.

HEATED SEAT ELEMENT
Refer to Heated Seat System for the location of the proper heated seat system diagnosis and testing procedures. To check the heated seat element and sensor circuits, proceed as follows. The wire harness connectors for the seat cushion heated seat element and sensor and for the seat back heated seat element are located under the seat, near the rear edge of the seat cushion frame. Refer to Wiring Diagrams for the location of complete heated seat system wiring diagrams.

NOTE: When checking heated seat elements for continuity, be certain to move the heating element being checked. Moving the element, such as siting in the seat will eliminate the possibility of an intermittent open in the element which would only be evident if the element was in a certain position. Failure to check the element in various positions could result in an incomplete test.

Seat Cushion Element Connector:

SEAT CUSHION
Disconnect and isolate the battery negative cable. Disconnect the green 4-way heated seat wire harness connector. Using an ohmmeter, check for continuity between pins A and B of the seat cushion wire harness connector. There should be continuity. If OK, test the seat back element as described below. If not OK, check the green 2-way seat cushion connector. If OK, replace the faulty seat cushion cover and element assembly.

SEAT BACK
Disconnect and isolate the battery negative cable. Disconnect the green 2-way heated seat back wire harness connector. Using an ohmmeter, check the resistance between the two pins. There should be continuity. If OK, test the heated seat control module. If not OK, replace the faulty seat back cover and element assembly.