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:

SRS Warning Light does not Come ON
DESCRIPTION WIRING DIAGRAM INSPECTION PROCEDURE 1 CHECK BATTERY Measure the voltage of the battery. Standard voltage: 11 to 14 V 2 CHECK CONNECTORS Turn the ignition switch to the LOCK position. Disconnect the negative (-) terminal cable from the battery, and wait for at le ...

Power Slide Door Pulse Sensor Malfunction on Rear Left Door
DTC B2224 Power Slide Door Pulse Sensor Malfunction on Rear Left Door DESCRIPTION A pulse sensor is built into slide door LH for jam and foreign object detection and for slide door position detection. The jam and foreign object detection feature of the pulse sensor monitors the o ...

Transmission Fluid Temperature Sensor "A" Performance
DESCRIPTION The ATF (Automatic Transmission Fluid) temperature sensor converts the fluid temperature into a resistance value which is input into the ECM. MONITOR DESCRIPTION The ATF temperature sensor converts the ATF temperature to an electrical resistance value. Based on the resis ...