LIGHTING SYSTEM > Headlight Beam Level Control ECU Communication Circuit

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DESCRIPTION

Body ECU sends signals that the headlight is ON and the daytime running light is on to the headlight beam level control ECU and operates the headlight beam level control system.
Headlight beam level control ECU receives the vehicle speed signal from the skid control ECU.

WIRING DIAGRAM


B110606E02


INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL J/B - HEADLIGHT BEAM LEVEL CONTROL ECU)


    B110648E01

  1. Disconnect the 1D connector of instrument panel junction block assembly and the H17 connector of headlight beam level control ECU.



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


    E068612E11

    Resistance:
    Tester connection
    		Condition
    		Specified condition
    1D-3 - H17-7
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - HEADLIGHT BEAM LEVEL CONTROL ECU)


    B110624E02

  1. Disconnect the connectors from the skid control ECU and the headlight beam level control ECU.

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

    Resistance:
    Tester connection
    		Condition
    		Specified condition
    S39-33 (RRO) - H17-6 (SPDR)
    		Always
    		Below 1 Ω
    S40-25 (RLO) - H17-5 (SPDL)
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE