Caravan L4-2.4L VIN B (2003)
Seat Heater: Testing and Inspection
Heated Seat Element
The wire harness connectors for the seat cushion and seat back heating elements are located under the seat, at the heated seat module. For circuit
descriptions and diagrams, refer to Wiring Diagrams.
In order to access and test the heated seat elements it will be necessary to remove the appropriate front seat retaining bolts and lay the seat rearward, up
against one of the rear seats. It is not necessary to disconnect the seat electrical connectors, just use care not to damage the attached wire harnesses while
testing.
NOTE: WHEN CHECKING HEATED SEAT ELEMENTS FOR CONTINUITY, BE CERTAIN TO MOVE THE HEATING ELEMENT BEING
CHECKED. MOVING THE ELEMENT SUCH AS SITTING IN THE SEAT WILL ELIMINATE THE POSSIBILITY OF AN INTERMITTENT
OPEN IN THE ELEMENT WHICH WOULD ONLY BE EVIDENT IF THE ELEMENT WAS MOVED IN A CERTAIN DIRECTION. FAILURE TO
CHECK THE ELEMENT IN VARIOUS POSITIONS COULD RESULT IN AN INCOMPLETE TEST.
Seat Cushion Element
1. From under the vehicle, remove the appropriate seats four retaining nuts.
2. From inside the vehicle, pull the seat up, off the mounting studs and lay it back, up against one of the rear seats.
3. Locate the heated seat module, attached to the bottom of the seat cushion pan. Remove the heated seat module from the seat cushion pan. Do not
disconnect the electrical connectors at this time.
4. Locate the green 4-way electrical connector, connected to the heated seat module. Disconnect the green 4-way connector from the heated seat
module.
5. Check for continuity between the two outboard circuit cavities of the wire harness connector (Pins 1&4). There should be continuity. If OK, refer
to Heated Seat Module Diagnosis and Testing in the Electronic Control Modules section of the service manual for complete system testing
procedures. If not OK, install a replacement heated seat cushion element. Refer to the procedure in this section.
Seat Back Element
1. From under the vehicle, remove the appropriate seats four retaining nuts.
2. From inside the vehicle, pull the seat up and OFF the mounting studs and lay it back, up against one of the rear seats.
3. Locate the heated seat module, attached to the bottom of the seat cushion pan. Remove the heated seat module from the seat cushion pan. Do not
disconnect the electrical connectors at this time.
4. Locate the gray 2-way electrical connector, connected to the heated seat module. Disconnect the 2-way connector from the heated seat module.
5. Check for continuity between the two circuit cavities of the 2-way wire harness connector. There should be continuity. If OK, refer to Heated Seat
Module Diagnosis and Testing in the Electronic Control Modules section of the service manual for complete system testing procedures. If not OK,
install a replacement heated seat back element. Refer to the procedure in this section.
