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:
Short to GND in Front Pretensioner Squib LH
Circuit
DTC B0137/71 Short to GND in Front Pretensioner Squib LH
Circuit
DESCRIPTION
The front pretensioner squib LH circuit consists of the center airbag sensor
assembly and the front seat
outer belt assembly LH.
This circuit instructs the SRS to deploy when deployment conditions are met.
DTC B ...
Installation
HINT:
Use the same procedures for the RH side and LH side.
The procedures listed below are for the LH side.
1. INSTALL CURTAIN SHIELD AIRBAG ASSEMBLY LH
Install the curtain shield airbag assembly LH with
the 13 bolts in the order shown in the illustration.
Torque: 14 N*m ...
Disassembly
1. REMOVE COOLER DRYER
(a) Using a hexagon wrench 14 mm (0.55 in.), remove
the cap from the modulator.
(b) Remove the O-ring from the cap.
(c) Using needle nose pliers, remove the cooler dryer. ...