Initial Inspection and Diagnostic Overview

Ventilated Seats Self-Diagnostic Function

The seat ventilation control unit has a thermistor self-diagnostic function. It indicates the result by lighting the LEDs of the seat ventilation switch.

Entering the Self-Diagnostic Function

1. Push and hold the HEAT side of the driver's seat ventilation switch.

2. Turn the combination light switch () ON.

3. Press the engine start/stop button to select the ON mode.

4. Within 2 to 5 seconds, turn the combination light switch OFF, then () ON and OFF again.

5. Release the HEAT side of the driver's seat ventilation switch, and press the HEAT side of the driver's seat ventilation switch 3 times within 5 seconds.

6. If the system enters the self-diagnostic mode, all of the indicators turn on for 3 seconds.

- During self-diagnostic mode, the control unit blinks the driver's or the front passenger's seat ventilation switch heat indicators in a specific pattern corresponding to the failure.
- An LED pattern will start to blink 2 seconds after all indicators turn off.
- The LED pattern will continue to blink every 2 seconds until self-diagnostic mode is off.
- If more than 1 failure exists, each pattern will be displayed according to their priority every 2 seconds.
After all patterns are displayed, the cycle will be repeated until self-diagnostic mode is off.
- The DTC will be displayed on either the driver's seat ventilation switch or front passenger's seat ventilation switch dependent upon where the failure has occurred.
- All LEDs turn off after entering the self diagnostic mode if there are no DTCs stored.

Indicator Blink Patterns





*: The indicator(s) will blink 4 times a second.

How To Clear the DTCs

Whenever the control unit detects failures (abnormal seat heater voltage, abnormal seat heater current, and/or a driver side or front passenger side seat not heating), each failure is stored in the control unit.

To clear the DTCs, press and hold the applicable HEAT side of the ventilation switch for 6 seconds while in the self-diagnostic mode.

NOTE:

- Completely clear all DTCs for the driver's side (or passenger's side) before clearing the other side.
- After clearing the DTCs, all seat heater indicators will turn on for 2 seconds, and then go off.
- A thermistor open or a thermistor short failure is stored only when the vehicle ignition in the ON mode. After the engine start/stop button is pressed to select the OFF mode, it is cleared.
- For self-diagnostic mode display of a thermistor open or a thermistor short failure, if the failure has already occurred, it will be detected within 6 seconds after the engine start/stop button is pressed to select the ON mode.
- To exit the self-diagnostic mode, press the engine start/stop button to select the OFF mode.