Service Information for Front Heated Seat Inoperative/Cold

The purpose of this bulletin is to provide the technician with the following service information:

1. The engine must be running for the heated seat feature to work. The heated seats will shut off automatically when the ignition is turned off.



2. Two buttons, located on the door, are used to control the heated seat.

•	Press the horizontal (RH) button to heat the entire seat, back and cushion.

•	Press the vertical (LH) button to heat ONLY the seat back.

•	The three light bars are an indicator of the level of heat selected for either the entire seat (horizontal button) or ONLY the seat back (vertical button).




3. To heat both the seat back and seat cushion at the same time, press the horizontal (RH) button with the heated seat symbol one time.

•	All 3 light bars will glow indicating the HIGH temperature setting.

•	The horizontal (RH) button does NOT have an ON/OFF indicator light.

4. Press the button a second time, 2 light bars will glow indicating the MEDIUM temperature setting for the entire seat.
5. Press the button a third time, 1 light bar will glow indicating the LOW temperature setting for the entire seat.
6. Press the button a fourth time to turn the entire heated seat OFF.



7. To heat ONLY the seat back, press the vertical (LH) button one time.

•	An ON/OFF indicator light over the heated seat back symbol will glow to designate that ONLY the seat back is being heated.

•	All 3 light bars over the horizontal (RH) button will glow indicating the HIGH temperature setting for ONLY the seat back.

8. Press the button a second time, 2 light bars will glow indicating the MEDIUM temperature setting for ONLY the seat back.
9. Press the button a third time, 1 light bar will glow indicating the LOW temperature setting for ONLY the seat back.
10. Press the button a fourth time to turn the heated seat back OFF.

Important: In order to eliminate unnecessary part replacement and comeback repairs, it is essential that the appropriate diagnostic tables and aids found in the applicable manuals are followed.

1. Verify the condition prior to making any repairs. Refer to Seats and Seat Controls in the applicable Owners Manual or this bulletin for proper heated seat switch operation information.
2. If an improperly operating front heated seat condition exists, refer to the Diagnostic Information and Procedures in the Seats sub-section of the applicable Service Manual in order to diagnose the system accurately.
3. When measuring the resistance of the seat heater elements, ensure the values are within the updated range of 1.5-5.5 ohms. Refer to DTC B2425 or B2430-Clearing the DTC in the Diagnostic Information and Procedures in the Seats sub-section of the applicable Service Manual.

Some heated seat components from the above listed vehicles have been returned to the Warranty Parts Center (WPC) for heat function not operating properly. Analyses of these parts show 'no out of specification condition' or No Trouble Found (NTF).

1. Provide customers with the knowledge that if bumped, either one of the heated seat switches can be activated/deactivated accidentally.
2. Ensure customers have a thorough understanding of how the heated seat switches function.