Headlight Beam Level Control Actuator Circuit

LIGHTING (EXT): LIGHTING SYSTEM: Headlight Beam Level Control Actuator Circuit

Headlight Beam Level Control Actuator Circuit

DESCRIPTION

The headlight leveling ECU assembly actuates the headlight leveling motor according to vehicle conditions.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Main Body / HL Auto Leveling / Active Test.
(e) Check that the motors operate.

HL Auto Leveling





OK:
Headlight leveling motors operate normally.

NG -- CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING MOTOR - HEADLIGHT LEVELING ECU ASSEMBLY)
OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
2. CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING MOTOR - HEADLIGHT LEVELING ECU ASSEMBLY)
(a) Disconnect the A40 headlight leveling ECU connector.




(b) Disconnect the A17 or A16 headlight leveling motor connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:

LH Side





RH Side





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. REPLACE HEADLIGHT LEVELING MOTOR (HEADLIGHT UNIT)
(a) Temporarily replace the headlight leveling motor with a new or normally functioning one Components.
(b) Perform the Active Test of the leveling motors.
OK:
Headlight leveling motors operate normally.

NG -- REPLACE HEADLIGHT LEVELING ECU ASSEMBLY
OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE