Toyota Sienna Quiz
Seat

Inspection

In this manual: Seat
Introduction — 55Service specifications — 7Maintenance — 7Engine — 264U151e automatic transaxle — 108Transfer — 19Propeller shaft — 8Drive shaft — 14Differential — 16Axle — 18Suspension — 37Tire and wheel — 54Brake control — 141Parking brake — 16Steering Column — 11Power steering — 18Air conditioning — 106Supplemental restraint system — 146Seat belt — 22Theft deterrent — 14Engine immobiliser — 17Cruise control — 65Lighting — 61Wiper and washer — 13Door lock — 42Meter — 28Audio / visual — 94Navigation — 108Park assist / monitoring — 33Horn — 5Garage door opener — 42GR-FE Engine control system — 126Supplemental restraint system — 147Other system — 14Windshield / windowglass — 43Mirror — 23Instrument panel — 6Seat belt — 22Seat — 92Engine hood / door — 104Exterior — 39Interior — 5Sliding roof — 9Multiplex communication — 18Can communication — 23
~2min read

1. INSPECT SEAT HEATER SWITCH LH

INSPECT SEAT HEATER SWITCH LH
  1. Measure the resistance of the seat heater switch when the switch is operated.

Resistance

Resistance

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

HINT: As the dial is being turned, the resistance changes gradually.

INSPECT SEAT HEATER SWITCH LH
  1. Push the seat heater switch ON and check that the seat heater switch indicator illuminates when the switch is operated.

    OK

Resistance

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

INSPECT SEAT HEATER SWITCH LH
  1. Check the seat heater switch illumination.

    OK

Resistance

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

2. INSPECT SEAT HEATER SWITCH RH

INSPECT SEAT HEATER SWITCH RH
  1. Measure the resistance of the seat heater switch when the switch is operated.

Resistance

Resistance

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

HINT: As the dial is being turned, the resistance changes gradually.

INSPECT SEAT HEATER SWITCH RH
  1. Push the seat heater switch ON and check that the seat heater switch indicator illuminates when the switch is operated.

OK

Resistance

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

INSPECT SEAT HEATER SWITCH RH
  1. Check the seat heater switch illumination.

OK

Resistance

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

3. INSPECT FRONT SEAT BACK HEATER ASSEMBLY LH

  1. Measure the resistance of the seatback heater.

Resistance

Resistance

If the result is not as specified, replace the seatback heater assembly.

4. INSPECT FRONT SEAT BACK HEATER ASSEMBLY RH

INSPECT FRONT SEAT BACK HEATER ASSEMBLY RH
  1. Measure the resistance of the seatback heater.

Resistance

Resistance

If the result is not as specified, replace the seatback heater assembly.

5. INSPECT FRONT SEAT CUSHION HEATER ASSEMBLY LH

INSPECT FRONT SEAT CUSHION HEATER ASSEMBLY LH
  1. Measure the resistance of the seat cushion heater.

Resistance

Resistance

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

6. INSPECT FRONT SEAT CUSHION HEATER ASSEMBLY RH

INSPECT FRONT SEAT CUSHION HEATER ASSEMBLY RH
  1. Measure the resistance of the seat cushion heater.

Resistance

Resistance

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

Test yourself

A quick Toyota Sienna quiz: every answer comes with an explanation and a link to the manual page.