Toyota Sienna Service Manual: Operating Light Control Rheostat does not Change Light Brightness
DESCRIPTION
The meter CPU receives signals for adjusting illumination on the meter from this circuit. The meter CPU detects the illumination level selected by the user according to the position of the rheostat knob.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 READ VALUE OF INTELLIGENT TESTER (LIGHT RHEOSTAT)
- Connect the intelligent tester to the DLC3.
- Turn the switch to the ON position.
- Turn the tester ON.
- Enter the following menus: DIAGNOSIS / OBD/MOBD / METER / DATA LIST.
- Check the values by referring to the table below.
METER:
OK: Light brightness displayed on the tester is almost the same as the actual light brightness.
REPLACE COMBINATION METER ASSEMBLY
2 CHECK HARNESS AND CONNECTOR (LIGHT CONTROL RHEOSTAT CIRCUIT)
- Disconnect the C10 connectors.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
- Measure the voltage according to the value(s) in the table below.
Standard voltage
REPLACE COMBINATION METER ASSEMBLY
Driver Side Seat Belt Warning Light does not Operate
DESCRIPTION
When turning the ignition switch to the ON position, the combination meter
assembly communicates with
the supplemental restraint system by the multiplex communication system. Unless
...
Meter Illumination is Always Dark
DESCRIPTION
Confirm that the vehicle is equipped with the optitron meter, then
check this circuit.
The combination meter assembly receives a auto dimmer signal from the
body ECU by t ...
Other materials:
Horn
To sound the horn, press on or
close to the mark.
WARNINGCaution while driving
Do not adjust the steering wheel while driving.
Doing so may cause the driver to mishandle the vehicle and cause an
accident,
resulting in death or serious injury.
After adjusting the steeri ...
Installing the spare tire
Remove any dirt or foreign matter
from the wheel contact surface.
If foreign matter is on the wheel
contact surface, the wheel nuts
may loosen while the vehicle is in
motion, causing the tire to come
off.
Install the tire and loosely
tighten each wheel nut by hand
by ...
Low Battery Positive Voltage
DTC C1241/41 Low Battery Positive Voltage
DESCRIPTION
If there is a problem with the brake actuator assembly (skid control ECU)
power supply circuit, the skid
control ECU outputs the DTC and prohibits the ABS operation with the fail safe
function.
If the voltage supplied to the IG1 termina ...
