Toyota Sienna Service Manual: Meter Illumination does not Dim at Night
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 the multiplex communication line.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK MULTIPLEX COMMUNICATION SYSTEM
- Check if MULTIPLEX communication DTC is output
Result
2 CHECK DTC
- Check if the DTC B1244 is output
Result
3 PERFORM ACTIVE TEST BY INTELLIGENT TESTER
- Operate the intelligent tester according to the steps on the display and select "DATA LIST".
MAIN BODY
OK: The meter illumination is dimmed when the DIMMER SIG is ON.
CHECK LIGHTING SETTING
4 REPLACE COMBINATION METER ASSEMBLY
OK: The operation of the combination meter assembly returns to normal.
END
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 ...
Combination meter
COMPONENTS
...
Other materials:
Front Airbag Sensor LH Circuit Malfunction
DTC B1149/37 Front Airbag Sensor LH Circuit Malfunction
DESCRIPTION
The front airbag sensor LH circuit consists of the center airbag sensor
assembly and front airbag sensor
LH.
If the center airbag sensor assembly receives signals from the front airbag
sensor LH, it judges whether or
not ...
On-vehicle inspection
1. INSPECT COOLER CONDENSER CORE
(a) If the fin of the cooler condenser core is dirty, clean
it with water and dry it with compressed air.
NOTICE:
Do not damage the fin of the cooler condenser
core.
(b) If the fin of the cooler condenser core is bent, make
it straight using a screwdriver or p ...
Operation check
1. ILLUMINATED ENTRY SYSTEM OPERATION CHECK
The illuminated entry system is explained below:
Turn the ignition switch OFF, close all the doors,
and set them in the lock condition.
Unlock any door and open any other doors and
check that the room light comes on. Close ...
