DIAGNOSIS AND TESTING
HEATED SEAT SWITCH
If a heated seat fails to heat and one or both of the indicator lamps on a heated seat switch flash, refer to Heated Seat System Diagnosis and Testing in this section for flashing LED failure identification. Refer to Wiring Diagrams for complete heated seat system wiring diagrams.
1. If the problem being diagnosed involves a heated seat switch indicator lamp that remains illuminated after the heated seat has been turned Off, (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/MEMORY HEATED SEAT/MIRROR MODULE - DIAGNOSIS AND TESTING) for heated seat module diagnosis and testing procedures. If not, go to STEP 2
2. Remove the heated seat switch (Refer to 8 - ELECTRICAL/HEATED SEATS/DRIVER HEATED SEAT SWITCH - REMOVAL). Check for continuity between the ground circuit cavity No.5 of the heated seat switch connector and a good ground. There should be continuity. If OK, go to STEP 3. If not OK, repair the open ground circuit as required.
3. Turn the ignition switch to the ON position. Check for battery voltage at the fused ignition switch output circuit cavity No.1 of the heated seat switch connector. If OK, go to STEP 4. If not OK, repair the open fused ignition switch output circuit as required.
4. Check the continuity between pin No.1 and pin No.3 of the heated seat switch. If the readings do not correspond to those in the Heated Seat Switch Continuity table, replace the heated seat switch. If OK, and the heated seat system is still not operating properly (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/MEMORY HEATED SEAT/MIRROR MODULE - DIAGNOSIS AND TESTING) for heated seat module diagnosis and testing procedures.
NOTE: Any resistance values (ohms Ω) given in the following text are supplied using the automatic range generated by a fluke® automotive meter. If another type of measuring device is used, the values generated may not be the same as the results shown here, or may have to be converted to the range used here.
| CONTINUITY BETWEEN | SWITCH POSITION | OHMS READING +/– 10% |
| PIN 1 AND 3 | OFF | 2.2 K (2200) OHMS |
| PIN 1 AND 3 | LO | .415 K (415) OHMS |
| PIN 1 AND 3 | HI | 33 OHMS |