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Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.

Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration,or damage.

Has a problem been found?

	▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
	▶ Go to "Signal circuit Inspection" procedure.

Disconnect Auto Head Lamp Leveling Sensor harness connector.

After lifting up the vehicle, keep the engine "ON" for measurement condition.

Measure signal waveform at AHLS ECU harness connector.

Specification : Signal Waveform & Data

Is "waveform" measured near the specified form in General information?

▶ This is a intermittent problem caused by poor contact of component or Control Unit

▶ Thoroughly check the looseness, poor connection, bent, corrison, contamination, deformation or damage of connector.

▶ Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedure.

▶ After its repair done, Perform the lamp actuation by GDS in order to verify its normal operation.

▶ Check the dashboard, wheel speed sensor and ABS(ESP) system.

▶ Check for open/short in harness.

▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.

▶ After its repair done, Perform the lamp actuation by GDS in order to verify its normal operation.