Toyota Highlander manuals

Toyota Highlander Service Manual: Inspection

1. INSPECT SEAT HEATER (FRONT) SWITCH LH

 INSPECT SEAT HEATER (FRONT) SWITCH LH


(a) Check the resistance between the terminals when the switch is operated.

Standard:

 INSPECT SEAT HEATER (FRONT) SWITCH LH


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.

Standard:

 INSPECT SEAT HEATER (FRONT) SWITCH LH


If the result is not as specified, replace the switch or bulb.

(c) Check that the seat heater switch indicator illuminates.

Standard:

 INSPECT SEAT HEATER (FRONT) SWITCH LH


If the result is not as specified, replace the switch or bulb.

2. INSPECT SEAT HEATER (FRONT) SWITCH RH

INSPECT SEAT HEATER (FRONT) SWITCH RH


(a) Check the resistance between the terminals when the switch is operated.

Standard:

INSPECT SEAT HEATER (FRONT) SWITCH RH


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.

Standard:

INSPECT SEAT HEATER (FRONT) SWITCH RH


If the result is not as specified, replace the switch or bulb.

(c) Check that the seat heater switch indicator illuminates

Standard:

INSPECT SEAT HEATER (FRONT) SWITCH RH


If the result is not as specified, replace the switch or bulb.

3. INSPECT SEAT HEATER RELAY

INSPECT SEAT HEATER RELAY


(a) Check the resistance of the relay.

Standard:

INSPECT SEAT HEATER RELAY


If the result is not as specified, replace the relay.

4. INSPECT SEPARATE TYPE FRONT SEAT CUSHION COVER LH

INSPECT SEPARATE TYPE FRONT SEAT CUSHION COVER LH


(a) Apply battery voltage and check the seat cushion heater.

  1.  Check the seat cushion heater.

Standard:

INSPECT SEPARATE TYPE FRONT SEAT CUSHION COVER LH


If the result is not as specified, replace the seat cushion cover.

NOTICE: 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.

  1.  Check the thermostat.

(b) Apply battery voltage and check the seat cushion heater.

  1.  Check the thermostat.

Standard:

INSPECT SEPARATE TYPE FRONT SEAT CUSHION COVER LH


If the temperature of the seat heater rises above the specified value, replace the seat cushion cover.

NOTICE: 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 SEPARATE TYPE FRONT SEAT CUSHION COVER RH

INSPECT SEPARATE TYPE FRONT SEAT CUSHION COVER RH


(a) Apply battery voltage and check the seat cushion heater.

  1.  Check the seat cushion heater.

Standard:

INSPECT SEPARATE TYPE FRONT SEAT CUSHION COVER RH


If the result is not as specified, replace the seat cushion cover.

NOTICE: 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) Apply battery voltage and check the seat cushion heater.

  1.  Check the thermostat.

Standard:

INSPECT SEPARATE TYPE FRONT SEAT CUSHION COVER RH


If the temperature of the seat heater rises above the specified value, replace the seat cushion cover.

NOTICE: 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 SEPARATE TYPE FRONT SEATBACK COVER

INSPECT SEPARATE TYPE FRONT SEATBACK COVER


(a) Apply battery voltage and check the seatback heater.

Standard:

INSPECT SEPARATE TYPE FRONT SEATBACK COVER


If the result is not as specified, replace the seatback cover.

NOTICE: 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

7. INSPECT SEPARATE TYPE FRONT SEATBACK COVER

INSPECT SEPARATE TYPE FRONT SEATBACK COVER


(a) Apply battery voltage and check the seat cushion heater.

Standard:

INSPECT SEPARATE TYPE FRONT SEATBACK COVER


If the result is not as specified, replace the seatback cover.

NOTICE: 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.

Location
PROBLEM SYMPTOMS TABLE Symptom Suspected Area Driver's and passenger's seat heaters do not warm up SEAT HTR fuse IG1 fuse Seat heater relay Wire h ...

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