AUDIO AND VISUAL SYSTEM > Dimmer Signal Circuit

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DESCRIPTION

The multiplex network body ECU sends a panel illumination signal to the radio receiver through this circuit.
The multiplex network body ECU determines the ambient brightness based on the light level detected by the automatic light control sensor and performs dim control.

WIRING DIAGRAM


E110890E05


INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - MULTIPLEX NETWORK BODY ECU)


    E110934E01

  1. Disconnect the radio receiver connector R4 and multiplex network body ECU connector B7.

  1. Measure the resistance according to the values in the table below.

    Standard resistance:
    Tester connection
    		Condition
    		Specified condition
    ADIM - ACAN
    		Always
    		Below 1 Ω
    ADIM - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.INSPECT RADIO RECEIVER


    E110928E03

  1. Connect the multiplex network body ECU connector.

  1. Turn the ignition switch to the ON position.

  1. Turn the light control switch to the TAIL or HEAD position.

  1. Measure the voltage according to the value(s) in the table below.

    Standard voltage:
    Tester connection
    		Condition
    		Specified condition
    ADIM - Body ground
    		Light control switch in TAIL or HEAD
    		10 to 14 V



NG
GO TO LIGHTING SYSTEM
OK

RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL