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:
Terminals of ECU
1. INSTRUMENT PANEL JUNCTION BLOCK
(MULTIPLEX NETWORK BODY ECU)
Disconnect the B6, B7 and B9 ECU connectors.
Disconnect the 1A, 1C, 1K, 1L and 1P J/B
connectors.
Check the voltage or resistance according to the
value(s) in the table below (wire harness side
connector).
...
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.
...
Open in Stop Light Switch Circuit
DTC C1249/49 Open in Stop Light Switch Circuit
DESCRIPTION
This skid control ECU inputs the stop light switch signal and detects the
status of brake operation.
The skid control ECU has an open detection circuit. If an open in the stop light
switch input line or GND
side stop light circuit ...
