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:

Oxygen Sensor Heater Control Circuit Low/ Oxygen Sensor Heater Control Circuit High/ Oxygen Sensor Heater Circuit Malfunction
DTC P0037 Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 2) DTC P0038 Oxygen Sensor Heater Control Circuit High (Bank 1 Sensor 2) DTC P0057 Oxygen Sensor Heater Control Circuit Low (Bank 2 Sensor 2) DTC P0058 Oxygen Sensor Heater Control Circuit High (Bank 2 Sensor 2) DTC P0141 Oxyg ...

Removal
HINT: On the LH side, use the same procedures as on the RH side. 1. REMOVE FRONT DOOR SCUFF PLATE RH Using a screwdriver, disengage the 3 clips and 2 claws, and remove the scuff plate. HINT: Tape the screwdriver tip before use. 2. REMOVE FRONT DOOR SCUFF PLATE LH 3. REMOVE REAR DOO ...

Installation
1. REMOVE FRONT SEAT INNER BELT ASSEMBLY HINT: Refer to the instructions for reassembly of the front seat assembly (for flat type). Refer to the instructions for reassembly of the front seat assembly (for manual seat). Refer to the instructions for reassembly of the ...