Meter / Gauge System Meter Illumination Does Not Dim At Night

Body Electrical. Camry. Acv40 Gsv40
Meter. Camry. Acv40 Gsv40

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN COMMUNICATION SYSTEM

CHECK DTC

PERFORM ACTIVE TEST USING INTELLIGENT TESTER

REPLACE COMBINATION METER ASSEMBLY

METER / GAUGE SYSTEM - Meter Illumination does not Dim at Night


DESCRIPTION

The meter CPU receives auto dimmer signals from the main body ECU via the CAN communication lines (CAN No. 1 Bus). When the meter CPU receives an auto dimmer signal, it dims the meter illumination. The main body ECU determines whether it is daytime, twilight, or nighttime based on the waveform transmitted from the automatic light control sensor. If the main body ECU determines that it is daytime, the ECU does not send auto dimmer signals. Therefore, the meter illumination (warning and indicator lights) will not dim even if the driver accidentally turns the light control switch to the TAIL or HEAD position in daytime.

WIRING DIAGRAM


Camry. Acv40 Gsv40.Meter.Meter / Gauge System.Meter / Gauge System Meter Illumination Does Not Dim At Night


INSPECTION PROCEDURE

1.CHECK CAN COMMUNICATION SYSTEM

  1. Check if CAN communication DTC is output (CAMRY_ACV40 RM000000WIB00WX.htmlfor LHD, CAMRY_ACV40 RM000000WIB00YX.html for RHD).

    Result:

    Result
    		Proceed to
    CAN communication DTC is not output.
    		A
    CAN communication DTC is output.
    		B (CAMRY_ACV40 RM000000WI600UX.htmlfor LHD, CAMRY_ACV40 RM000000WI600VX.html for RHD)


B
GO TO CAN COMMUNICATION SYSTEM
A


2.CHECK DTC

  1. Check if DTC B1244 is output (CAMRY_ACV40 RM000000PKT007X.html).

    Result:

    Result
    		Proceed to
    B1244 is not output
    		A
    B1244 is output
    		B (CAMRY_ACV40 RM0000011M1008X.html)


B
GO TO LIGHTING SYSTEM
A


3.PERFORM ACTIVE TEST USING INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to the ON position.

  1. Turn the tester ON.

  1. Light control switch TAIL/HEAD.

  1. Enter the following menus: Diagnosis / Body / Main Body / Active Test.

  1. Check the meter illumination.


Main Body:
Tester Display
Measurement Item/Range
Diagnostic Note
Dimmer Sig
Auto dimmer signal ON/OFF
-
OK:
The meter illumination is dimmed when the Dimmer Sig is ON.
HINT:
Refer to the sensitivity setting in the customization table of the automatic light control system. (Link)


NG
Go to step 4
OK

CHECK LIGHTING SETTING

4.REPLACE COMBINATION METER ASSEMBLY

  1. Replace the combination meter assembly with a new or a normal one.

OK:
The operation of the combination meter assembly returns to normal.


NG
REPLACE MAIN BODY ECU
OK

END