Toyota Sienna Service Manual: Distance Control Switch Circuit
DESCRIPTION
The distance control switch sets the vehicle-to-vehicle distance mode. The distance control switch is installed in the steering pad switch. The vehicle-to-vehicle distance set value can be changed by operating the steering pad switch (distance control switch) while the dynamic laser cruise control system is in operation.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT STEERING PAD SWITCH ASSEMBLY
- Remove the steering pad switch assembly
- Measure the resistance according to the value(s) in the table below.
Standard resistance
HINT: When a malfunction is detected in the distance control switch, replace the steering pad switch assembly.
2 INSPECT SPIRAL CABLE
NOTICE: The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may cause airbag deployment. Be sure to read the page shown in the brackets.
HINT:
- Removal (34)
- Installation
- Remove the spiral cable.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
HINT: The spiral cable makes a maximum of approximately 5 rotations.
3 CHECK HARNESS AND CONNECTOR (DISTANCE CONTROL ECU - SPIRAL CABLE)
- Disconnect the D2 distance control ECU connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
4 CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - BODY GROUND)
- Measure the resistance according to the value(s) in the table below.
Standard resistance
5 INSPECT DISTANCE CONTROL ECU
- Remove the distance control ECU with the connector.
- Turn the ignition switch to the ON position.
- Measure the voltage according to the value(s) in the table below.
Standard voltage
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
Distance Control ECU Power Source Circuit
DESCRIPTION
This circuit provides power to operate the distance control ECU. The distance
control ECU determines
information about the vehicle in front based on data from the laser sensor, and
t ...
Laser Sensor Power Source Circuit
DESCRIPTION
This circuit provides power to the laser sensor. The laser sensor emits radio
waves towards an object in
front and measures the distance and direction of the object by receiving the
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Other materials:
Reassembly
1. INSTALL SHOCK ABSORBER ASSEMBLY FRONT LH
2. INSTALL FRONT COIL SPRING INSULATOR LOWER
LH
(a) Install the front coil spring insulator lower LH onto
the shock absorber assembly front LH.
3. INSTALL FRONT SPRING BUMPER LH
(a) Install the front spring bumper LH to the piston rod.
4. INSTALL FR ...
Removal
1. DISCONNECT BATTERY NEGATIVE TERMINAL
2. REMOVE FRONT DOOR SCUFF PLATE LH
3. REMOVE COWL SIDE TRIM BOARD LH
4. REMOVE INSTRUMENT PANEL FINISH PANEL SUBASSEMBLY
LOWER LH (See page IP-6)
5. REMOVE REAR DOOR SCUFF PLATE RH
6. REMOVE REAR DOOR SCUFF PLATE LH
7. REMOVE FRONT SEAT ASSEMBLY LH
HI ...
Poor Sound Quality in All Modes (Low Volume)
INSPECTION PROCEDURE
1 CHECK AUDIO SETTINGS
Set "BASS", "MID" and "TREB" to the initial values and
check that sound is normal.
OK:
Malfunction disappears.
2 COMPARE WITH ANOTHER VEHICLE OF SAME MODEL
Compare with another vehicle of the same model.
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