AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM > Diagnosis Circuit

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DESCRIPTION

The headlight leveling ECU assembly outputs DTC information to the intelligent tester via this circuit.

WIRING DIAGRAM


E143270E10


INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (DLC3 - HEADLIGHT LEVELING ECU ASSEMBLY)

  1. Disconnect the A34 headlight leveling ECU assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A34-15 (PRST) - I39-7 (SIL)
    		Always
    		Below 1 Ω
    A34-15 (PRST) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)