Toyota Sienna Service Manual: Adjustment
1. ADJUST BUZZER VOLUME
- Turn the knob on the clearance warning ECU to adjust the volume.
- Park / Neutral Position Switch Circuit
- Speed Signal Circuit
- Back Sonar Sensor LH Circuit
- Back Sonar Sensor RH Circuit
- Front Clearance Sonar Sensor LH Circuit
- Front Clearance Sonar Sensor RH Circuit
- Rear Clearance Sonar Sensor LH Circuit
- Rear Clearance Sonar Sensor RH Circuit
- No. 1 Clearance Warning Buzzer Circuit
- Clearance Warning ECU Power Source Circuit
- No. 2 Clearance Warning Buzzer Circuit
- Indicator Circuit
Terminals of ECU
1. CLEARANCE WARNING ECU
*1: with Front Clearance Sonar
2. AIR CONDITIONER AMPLIFIER ASSEMBLY
*1: with Front Clearance Sonar
*2: Manual A/C
*3: Auto A/C
Reference: ...
Park / Neutral Position Switch Circuit
DESCRIPTION
The clearance warning ECU receives the reverse or park position signal from
the park / neutral position
switch.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT CLEARANCE WARNING E ...
Other materials:
Airbag ECU Communication Stop
DTC B1281 Airbag ECU Communication Stop
DESCRIPTION
DTC B1281 is output when communication between the airbag ECU and the
multiplex network gateway
ECU stops for more than 10 seconds.
DTC No.
DTC Detection Condition
Trouble Area
B1281
Airbag ECU communi ...
Cruise control main switch
COMPONENTS
Removal
1. DISCONNECT BATTERY NEGATIVE TERMINAL
2. REMOVE STEERING WHEEL COVER LOWER NO.2
(24)
3. REMOVE STEERING WHEEL COVER LOWER NO.3
(24)
4. REMOVE HORN BUTTON ASSEMBLY
5. REMOVE CRUISE CONTROL MAIN SWITCH
Disconnect the connectors.
Remove the 2 ...
Power back door opener / closer switch
INSPECTION
1. INSPECT SATELLITE SWITCH
Inspect the resistance of the back door switch.
Resistance
If the result is not as specified, replace the switch.
Apply battery voltage and check whether the switch
illuminates.
Standard
HINT:
Whether the switch illuminates or not wi ...
