Toyota Sienna Service Manual: Meter Illumination does not Dim at Night

Toyota Sienna Service Manual / Meter / Meter / gauge system / On-vehicle inspection / 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

WIRING DIAGRAM

INSPECTION PROCEDURE

1 CHECK MULTIPLEX COMMUNICATION SYSTEM

Check if MULTIPLEX communication DTC is output

Result

Result

2 CHECK DTC

Check if the DTC B1244 is output

Result

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

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:

Removal
1. REMOVE INSTRUMENT PANEL SUB-ASSEMBLY WITH PASSENGER AIRBAG ASSEMBLY HINT: Refer to the instructions for removal of the instrument panel sub-assembly w/ passenger airbag assembly (See page IP-5). 2. REMOVE HEATER TO FOOT DUCT NO.1 (a) Remove the clip and the heater to foot duct No. 1. 3 ...

Short to B+ in Front Pretensioner Squib LH Circuit
DTC B0138/72 Short to B+ 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 B01 ...

Power Slide Door Warning Buzzer LH does not Sound
DESCRIPTION The power slide door system uses warning buzzers built into LH slide doors respectively. Each buzzer has 2 ways of sounding that are used differently according to the situations. When all the following conditions are met, the warning buzzer sounds at a cycle of ...