Toyota Sienna Service Manual: How to proceed with troubleshooting
1 VEHICLE BROUGHT TO WORKSHOP
2 CUSTOMER PROBLEM ANALYSIS
3 CHECK INITIAL CHECK FUNCTION
4 PROBLEM SYMPTOMS TABLE
THE CORRESPONDING SYSTEM DOES NOT EXIST (Go to step 5)
5 BASED ON THE MALFUNCTION SYMPTOM, PERFORM THE TROUBLESHOOTING BELOW
- Operation check (C).
- Terminals of ECU
6 ADJUST, REPAIR OR REPLACE
7 CONFIRMATION TEST
END
System description
1. GENERAL
This system uses ultrasonic sensors to detect any
obstacles at the corners and the rear of the vehicle.
The system then informs the driver of the distance
between the sens ...
Operation check
1. DETECTION RANGE MEASUREMENT AND INDICATOR CHECK
Turn the IG switch ON.
Move the shift lever to the R position (when the back
sonar and rear clearance sonar is checked).
...
Other materials:
Inspection
1. INSPECT INVERTER MAIN SWITCH
Inspect the continuity between terminal at the each
switch position shown in the chart.
If continuity is not as specified, replace the main
switch assembly.
Inspect the bulb state when connecting the battery
to each terminal
...
Fold Seat Switch Circuit
DESCRIPTION
When the fold seat switch is operated, a switch operation signal is sent to
the fold seat control ECU. The
ECU receives switch operation signals from each switch and activates the folding
motor, reclining motor,
and release actuator.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 IN ...
Back Door Closer does not Operate
DESCRIPTION
The power back door ECU controls the back door closer system. In response to
the signals output from
the switches related to the back door lock, the back door latch activates the
closer motor.
HINT:
The back door closer system operates regardless of whether the power back door
...
