Scan Tool Diagnosis

The most reliable, efficient, and accurate means to diagnose the heated seat system requires the use of a diagnostic scan tool and the Appropriate Diagnostic Information. The diagnostic scan tool can provide vital information to the technician trying to find a problem with the heated seat system. Diagnostic logic is built into the Heated Seat Module and Instrument Cluster to help locate the problem by the most efficient means possible. Anytime a problem is suspected, a diagnostic scan tool should be obtained and used to retrieve any heated seat system related stored fault codes.

If diagnostic fault codes are present in the module, record them on a piece of paper immediately before proceeding any further. Then, use these fault codes to identify the problem by verifying the fault code. Example, If the module records "DRIVER SEAT HEAT OUTPUT OPEN" fault code, locate the diagnostic procedure for this code in the Appropriate Diagnostic Information and follow the flow chart until the specific problem is located and resolved. Once the problem is thought to be corrected, erase the stored fault code using the diagnostic scan tool and verify correct system operation. If the heated seat system is functioning correctly, verify that there are no other stored codes and return the vehicle to service.

If the fault code could not be verified, this is a good indication that an INTERMITTENT problem may be present. You must then attempt to find the intermittent problem, such as moving the heating element within the seat while testing continuity or wiggling the wire harness/electrical connectors under the seat while testing continuity.

The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds. For complete circuit diagrams, refer to the SYSTEM WIRING DIAGRAMS article. Also refer to CONNECTOR PIN-OUT article as needed.