Toyota Sienna Service Manual: Inspection
1. INSPECT SEAT HEATER SWITCH LH
- Measure the resistance of the seat heater switch when the switch is operated.
Resistance
If the result is not as specified, replace the switch.
HINT: As the dial is being turned, the resistance changes gradually.
- Push the seat heater switch ON and check that the
seat heater switch indicator illuminates when the
switch is operated.
OK
If the result is not as specified, replace the switch.
- Check the seat heater switch illumination.
OK
If the result is not as specified, replace the seat heater switch or bulb.
2. INSPECT SEAT HEATER SWITCH RH
- Measure the resistance of the seat heater switch when the switch is operated.
Resistance
If the result is not as specified, replace the switch.
HINT: As the dial is being turned, the resistance changes gradually.
- Push the seat heater switch ON and check that the seat heater switch indicator illuminates when the switch is operated.
OK
If the result is not as specified, replace the switch.
- Check the seat heater switch illumination.
OK
If the result is not as specified, replace the seat heater switch or bulb.
3. INSPECT FRONT SEAT BACK HEATER ASSEMBLY LH
- Measure the resistance of the seatback heater.
Resistance
If the result is not as specified, replace the seatback heater assembly.
4. INSPECT FRONT SEAT BACK HEATER ASSEMBLY RH
- Measure the resistance of the seatback heater.
Resistance
If the result is not as specified, replace the seatback heater assembly.
5. INSPECT FRONT SEAT CUSHION HEATER ASSEMBLY LH
- Measure the resistance of the seat cushion heater.
Resistance
If the result is not as specified, replace the seat cushion heater assembly.
6. INSPECT FRONT SEAT CUSHION HEATER ASSEMBLY RH
- Measure the resistance of the seat cushion heater.
Resistance
If the result is not as specified, replace the seat cushion heater assembly.
On-vehicle inspection
1. CHECK SEAT HEATER CONTROL (WIRE HARNESS
SIDE)
Disconnect the connector from the seat heater
control.
Measure the voltage and resistance of each
terminal of the wire harne ...
Front seat assembly (for Flat Type)
COMPONENTS
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Other materials:
Description of initialization
(a) Perform initialization in the following cases:
Before delivery of a new vehicle.
After replacement of the tire pressure warning
ECU*.
After replacement of the tire pressure warning
valve and transmitter.
Specified tire pressure changes depending on
the size or type of the tire.
...
Brake Warning Light Remains ON
DESCRIPTION
The BRAKE warning light comes on when the brake fluid is insufficient, the
parking brake is applied or the
EBD is defective.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
When releasing the parking brake, move the shift lever into the P position in an
AT vehicle, and choke in
...
Precaution
1. INSPECTION PROCEDURE FOR VEHICLE INVOLVED
IN ACCIDENT
Perform the zero point calibration and sensitivity
check if any of the following conditions occur.
The occupant classification ECU is replaced.
Accessories (seatback tray and seat cover, etc.)
are installed.
...
