Driver Heated Seat Switch Test

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.

1. If the problem being diagnosed involves inoperative heated seat switch back lighting and the heated seat elements do heat, disconnect the inoperative switch and check for continuity between the ground pin at the heated seat switch connector and ground. If there is no continuity, repair an open wire between ground and the heated seat switch connector. If there is continuity, replace the inoperative heated seat switch with a known good unit. If the problem being diagnosed involves inoperative heated seat switch back lighting and the heated seat elements do not heat, refer to Step 2. If the problem being diagnosed involves inoperative heated seat switch indicator lamps and the heated seat elements do not heat, refer to Step 2. If the problem being diagnosed involves inoperative heated seat switch indicator lamps, inoperative back lighting and the heated seat elements do heat, go to Step 6. 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 Heated Seat Module in Electronic Control Modules for the location of the proper heated seat module diagnosis and testing procedures. Also refer to the Body Diagnostic for additional diagnosis and testing procedures.
2. Check the fused ignition switch output (run) fuse in the Junction Block (JB). If OK, go to Step 3. If not OK, repair the shorted circuit or component as required and replace the faulty fuse.
3. Turn the ignition switch to the ON position. Check for battery voltage at the fused ignition switch output (run) fuse in the JB. If OK, go to Step 4. If not OK, repair the open fused ignition switch output (run) circuit to the ignition switch as required.
4. Disconnect and isolate the battery negative cable. Remove the heated seat switch from the center console. Disconnect the wire harness connector from the connector receptacle on the back of the heated seat switch to be tested. Reconnect the battery negative cable. Turn the ignition switch to the Run position. Check for battery voltage at the fused ignition switch output (run) circuit cavity of the center console wire harness connector for the heated seat switch. If OK, go to Step 5. If not OK, repair the open fused ignition switch output (run) circuit to the JB fuse as required.

Heated Seat Switch Continuity Chart:

5. Check the continuity and resistance values of the heated seat switch in the Neutral, Low and High positions as shown in the Heated Seat Switch Continuity chart. If OK, refer to Heated Seat Module in Electronic Control Modules for the location of the proper heated seat module diagnosis and testing procedures. Also refer to the Body Diagnostic for additional diagnosis and testing procedures. If not OK, replace the faulty heated seat switch.
6. Replace the inoperative heated seat switch with a known good unit and test the operation of the switch indicator lamps. If OK, discard the faulty heated seat switch. If not OK, refer to Heated Seat Module in Electronic Control Modules for the location of the proper heated seat module diagnosis and testing procedures. Also refer to the Body Diagnostic for additional diagnosis and testing procedures.