Headlight Beam Level Control System

INSPECTION







1. INSPECT HEADLIGHT BEAM LEVEL CONTROL ACTUATOR RESISTANCE
a. Check that continuity exists between terminals 2 and 5.
b. Check that resistance exists between terminals, as shown in the chart.
If resistance value is not as specified, replace the actuator.







2. INSPECT FRONT HEIGHT CONTROL SENSOR
a. Connect 3 dry batteries of 1.5 V in series.
b. Connect terminal 1 to the batteries' positive (+) terminal, and terminal 4 to the batteries' negative (-) terminal, then apply voltage about 4.5 V between terminals 1 and 4.
c. Measure the voltage between terminals 2 and 4, when the height control sensor link is slowly moved up and down.
If voltage is not as specified, replace the height control sensor.







3. INSPECT REAR HEIGHT CONTROL SENSOR
a. Connect 3 dry batteries of 1.5 V in series.
b. Connect terminal 3 to the batteries' positive (+) terminal, and terminal 1 to the batteries' negative (-) terminal, then apply voltage about 4.5 V between terminals 1 and 3.
c. Measure the voltage between terminals 1 and 2, when the height control sensor link is slowly moved up and down.







4. Connector disconnected:
INSPECT HEADLIGHT BEAM LEVEL CONTROL ECU CIRCUIT
Disconnect the connector from the ECU and inspect the connector on the wire harness side, as shown.
If circuit is not as specified, perform the inspection.







5. Connector connected:
INSPECT HEADLIGHT BEAM LEVEL CONTROL ECU CIRCUIT
Connect the connector from the ECU and inspect the connector, as shown in the table.
If the circuit is not as specified, replace the ECU.

Reference INSPECTION USING OSCILLOSCOPE






HINT: The correct waveform is as shown in the illustration.