Meter / Gauge System Meter Illumination Is Always Dark

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Meter Gauge Display. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN COMMUNICATION SYSTEM

PERFORM ACTIVE TEST USING GTS (DIMMER SWITCH)

CHECK COMBINATION METER ASSEMBLY

METER / GAUGE SYSTEM - Meter Illumination is Always Dark


DESCRIPTION

w/ Multi-information Display:
In this circuit, the combination meter assembly receives auto dimmer signals from the main body ECU using the CAN communication lines. When the combination meter assembly 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 the daytime.
HINT:
When the meter illumination does not dim at night, the light control rheostat position is in the TAIL cancel position, or there may be a malfunction in the automatic light control sensor, main body ECU, CAN communication system, wire harness or connector, or combination meter.

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Meter Gauge Display.Meter / Gauge System.Meter / Gauge System Meter Illumination Is Always Dark


INSPECTION PROCEDURE

1.CHECK CAN COMMUNICATION SYSTEM

  1. Check for DTCs (Click here).

    Result
    Result
    		Proceed to
    DTC is not output
    		A
    CAN communication system DTC is output
    		B
    Lighting system DTC (B1244) is output
    		C
HINT:
*: Refer to CAN communication system:
  1. for LHD with Central Gateway ECU (Click here).
  2. for LHD without Central Gateway ECU (Click here).
  3. for RHD with Central Gateway ECU (Click here).
  4. for RHD without Central Gateway ECU (Click here).


B
GO TO CAN COMMUNICATION SYSTEM*

C
GO TO LIGHTING SYSTEM (Click here)
A


2.PERFORM ACTIVE TEST USING GTS (DIMMER SWITCH)

  1. Operate the GTS according to the display and select Active Test.

    Main Body
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Dimmer Signal
    		Illumination dimming operation
    		ON or OFF
    		-
    OK:
    Meter illumination is dimmed when the dimmer switch is ON.
    HINT:
    Refer to the sensitivity setting in the customization table of the automatic light control system (Click here).
Result
Result
Proceed to
NG
A
OK
B


NG
CHECK LIGHTING SETTING (Click here)
OK


3.CHECK COMBINATION METER ASSEMBLY

  1. Replace the combination meter with a new one (Click here).

  1. Check that the operation of the combination meter returns to normal (Click here).

    OK:
    Operation of combination meter returns to normal.
Result
Result
Proceed to
OK
A
NG (for LHD)
B
NG (for RHD)
C


B
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (Click here)

C
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (Click here)
A

END (COMBINATION METER IS DEFECTIVE)