Toyota Sienna Service Manual: How to proceed with troubleshooting
HINT:
- Use these procedures to troubleshoot the power folding seat system.
- *: Use the intelligent tester.
1 VEHICLE BROUGHT TO WORKSHOP
2 INSPECT BATTERY VOLTAGE
Standard voltage: 10 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding.
3 PROBLEM SYMPTOMS TABLE
Result
4 OVERALL ANALYSIS AND TROUBLESHOOTING*
- Terminals of ECU
- On-vehicle Inspection
5 REPAIR OR REPLACE
6 CONFIRMATION TEST
END
System description
1. DESCRIPTION OF POWER REAR NO. 2 SEAT WITH
STOWING FUNCTION
A power rear no. 2 seat with stowing function has
been adopted for the third-row seats.
The power rear no. 2 seat wit ...
Initialization
HINT:
The seatback position is initialized at the factory before
shipment, so initialization is not normally required.
There is an initialization function for cases when
reinitializati ...
Other materials:
Power back door warning buzzer
INSPECTION
1. POWER BACK DOOR WARNING BUZZER
Check the resistance of the buzzer.
Resistance
If the result is not as specified, replace the buzzer.
NOTICE:
The circuit that causes the buzzer to sounds
is built into the back door ECU, not around
the buzzer.
Directly applying ...
TRAC OFF Indicator Light does not Come ON
DESCRIPTION
The skid control ECU is connected to the combination meter via CAN and
multiplex communications.
When the traction OFF switch is turned on, the TRAC OFF indicator light will
come on (for 2WD model).
WIRING DIAGRAM
Refer to TRAC OFF Indicator Light Remains ON (See page BC-157).
...
Shift Solenoid "D" Performance (Shift Solenoid
Valve S4)
SYSTEM DESCRIPTION
The ECM uses signals from the vehicle speed sensor to detect the actual gear
position (1st, 2nd, 3rd, 4th
or 5th gear).
Then the ECM compares the actual gear with the shift schedule in the ECM memory
to detect mechanical
problems of the shift solenoid valves, valve b ...
