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:
Headlight Relay Circuit
DESCRIPTION
The Multiplex network body ECU controls HEAD relay when signal is received
from headlight dimmer
switch assembly.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 PERFORM ACTIVE TEST BY INTELLIGENT TESTER
Connect the intelligent tester to DLC3.
Turn the ignition switch ON and ...
Location of the spare tire, jack and tools
Spare tire
Jack handle
Tire bag
Jack
Wheel nut wrench
Adapter socket
Tire strap
WARNINGUsing the tire jack
Observe the following precautions.
Improper use of the tire jack may cause the vehicle to suddenly fall off
the jack, leading to death or serious injury. ...
Right Rear Wheel Speed Sensor Signal
DESCRIPTION
Refer to DTCs C0200/31, C0205/32, C1235/35 and C1236/36 (See page BC-92).
HINT:
DTC C0210/33 and C1238/38 are for the right rear speed sensor.
DTC C0215/34 and C1239/39 are for the left rear speed sensor.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 READ VALUE ON INTELL ...
