Toyota
Jeep Cherokee
 Service Manual
Electrically heated systems » Heated seat system » Diagnosis and testing
Seat heat interface module

Before testing the seat heat interface module, test the heated seat switch, the heated seat elements, and the heated seat sensor as described in the Diagnosis and Testing section of this group. If testing of the heated seat switch, elements, and sensor reveals no problems, proceed as follows. For circuit descriptions and diagrams, refer to 8W - 63 - Power Seat With Heated Seats in Group 8W - Wiring Diagrams.

(1) Replace the seat heat interface module with a known good unit and test the operation of the heated seats. If OK, discard the faulty seat heat interface module. If not OK, go to Step 2.

(2) Test each of the circuits from the heated seat switch, heated seat relay, heated seat elements, and heated seat sensor to the seat heat interface module.

Repair any short or open circuits as required.

    More about «Diagnosis and testing»:

    Heated seat system

    Heated seat switch

    Heated seat element and sensor

    Heated seat relay

    Seat heat interface module

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