Component Tests and General Diagnostics

INSPECTION

1. Driver side:
INSPECT SEAT HEATER SWITCH

a. Measure the resistance between the terminals when the switch is operated.
If the result is not as specified, replace the seat heater switch.

b. Push the seat heater switch ON and check that the seat heater switch indicator illuminates when switch is operated.
If the result is not as specified, replace the switch or bulb.

c. Check that the seat heater switch illuminates.
If the result is not as specified, replace the switch or bulb.

2. Passenger side:
INSPECT SEAT HEATER SWITCH

a. Measure the resistance between the terminals when the switch is operated.
If the result is not as specified, replace the seat heater switch.

b. Push the seat heater switch ON and check that the seat heater switch indicator illuminates.
If the result is not as specified, replace the switch or bulb.

c. Check that the seat heater switch illuminates.
If the result is not as specified, replace the switch or bulb.

3. INSPECT FRONT SEAT CUSHION HEATER ASSY LH

a. Check the seat cushion heater.
1. Apply battery voltage and check the seat cushion heater.
If the result is not as specified, replace the seat cushion heater assy.

NOTE: After confirming that the seat heater is functioning normally, immediately remove the battery leads. Failing to do so will cause the seat heater to overheat.

b. Check the thermostat.
1. Apply battery voltage and check the seat cushion heater.
If the temperature of the seat heater rises above the specified value, replace the seat heater assy.

NOTE: After confirming that the seat heater's temperature is rising, immediately remove the battery leads. Failing to do so will cause the seat heater to overheat if the thermostat is malfunctioning.

4. INSPECT FRONT SEATBACK HEATER ASSY LH
a. Apply battery voltage and check the seatback heater.
If the result is not as specified, replace the seatback heater assy.

NOTE: After confirming that the seat heater is functioning normally, immediately remove the battery leads. Failing to do so will cause the seat heater to overheat.

5. INSPECT FRONT SEAT CUSHION HEATER ASSY RH
a. Check the seat cushion heater.
1. Apply battery voltage and check the seat cushion heater.
If the result is not as specified, replace the seat cushion heater assy.

NOTE: After confirming that the seat heater is functioning normally, immediately remove the battery leads. Failing to do so will cause the seat heater to overheat.

6. INSPECT FRONT SEATBACK HEATER ASSY RH
a. Apply battery voltage and check the seat cushion heater.
If the result is not as specified, replace the seatback heater assy.

NOTE: After confirming that the seat heater is functioning normally, immediately remove the battery leads. Failing to do so will cause the seat heater to overheat.