LEMON Manuals: Even more car manuals for everyone
Home >> Subaru >> 2021 >> WRX Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Exterior Lights >> Exterior Lights (Diagnostics) >> Diagnostics with Phenomenon >> Inspection >> The Auto Headlight Beam Leveler Does Not Operate

The Auto Headlight Beam Leveler Does Not Operate

CAUTION:
  • Before performing diagnosis, check the fuse in this circuit.
  • Initialization is required after replacing the auto headlight beam leveler Control Module.

Wiring diagram: 

Headlight beam leveler system. Refer to WIRING SYSTEM>HEADLIGHT BEAM LEVELER SYSTEM>WIRING DIAGRAM .

G13265079Courtesy of SUBARU OF AMERICA, INC.
  1. CHECK CURRENT DATA. 

    Display «Control module voltage» using Subaru Select Monitor. Refer to AUTO HEADLIGHT BEAM LEVELER SYSTEM (DIAGNOSTICS)>READ CURRENT DATA .

    Does the current data indicate the standard value?

    Yes:  Go to  3.

    No:  Go to  2.

  2. CHECK HARNESS BETWEEN POWER SUPPLY - AUTO HEADLIGHT BEAM LEVELER Control Module. 
    1. Disconnect the auto headlight beam leveler Control Module connector.
    2. Turn the ignition switch to ON.
    3. Measure the voltage between the auto headlight beam leveler Control Module connector and chassis ground.

      Connector & terminal

      (B150) No. 1 (+) - Chassis ground (-):

      Is the voltage 8 - 16 V?

      Yes:  Replace the auto headlight beam leveler Control Module. Refer to LIGHTING SYSTEM>AUTO HEADLIGHT BEAM LEVELER CONTROL MODULE .

      No:  Repair or replace the harness.

  3. CHECK INDICATOR OUTPUT. 

    Turn the ignition switch to ON.

    Does the warning indicator turn on for three seconds?

    Yes:  Go to  5.

    No:  Go to  4.

  4. CHECK CURRENT DATA. 
    1. Display «Indicator Signal» using Subaru Select Monitor. Refer to AUTO HEADLIGHT BEAM LEVELER SYSTEM (DIAGNOSTICS)>READ CURRENT DATA .
    2. Turn the ignition switch to ON.

      Is it set as ON for 3 seconds?

      Yes:  Check the combination meter. Refer to COMBINATION METER (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .

      No:  Replace the auto headlight beam leveler Control Module. Refer to LIGHTING SYSTEM>AUTO HEADLIGHT BEAM LEVELER CONTROL MODULE .

  5. CHECK INDICATOR OUTPUT. 

    Leave the ignition switch to ON for 10 seconds.

    Does the warning indicator light go off?

    Yes:  Go to  6.

    No:  Go to  10.

  6. CHECK HEADLIGHT ASSEMBLY (ACTUATOR) DRIVE. 
    1. Connect the auto headlight beam leveler Control Module connector.
    2. Turn the ignition switch to ON, and within 10 seconds, repeat the OFF - Low beam headlight switch 5 times.
    3. Check that the headlight beam drops once, then returns to normal.
    4. Then, after waiting for 30 seconds or more with the ignition ON, turn the ignition switch to OFF.

      Does the headlight beam drop down once, and then return?

      Yes:  Replace the auto headlight beam leveler Control Module. Refer to LIGHTING SYSTEM>AUTO HEADLIGHT BEAM LEVELER CONTROL MODULE .

      No:  Go to  7.

  7. CHECK HEADLIGHT ASSEMBLY (ACTUATOR) OUTPUT. 
    1. Display «Actuator Signal» using Subaru Select Monitor. Refer to AUTO HEADLIGHT BEAM LEVELER SYSTEM (DIAGNOSTICS)>READ CURRENT DATA .
    2. Turn the ignition switch to ON, and within 10 seconds, repeat the OFF - Low beam of headlight switch 5 times.
    3. Check that the headlight beam drops once, then returns to normal.
    4. Then, after waiting for 30 seconds or more with the ignition ON, turn the ignition switch to OFF.

      Does the current data indicate the standard value? (Does the value change at 10 - 90%?)

      Yes:  Go to  8.

      No:  Replace the auto headlight beam leveler Control Module. Refer to LIGHTING SYSTEM>AUTO HEADLIGHT BEAM LEVELER CONTROL MODULE .

  8. CHECK OUTPUT VOLTAGE BETWEEN HEADLIGHT ASSEMBLY (ACTUATOR). 
    1. Disconnect the auto headlight beam leveler Control Module connector.
    2. Turn the ignition switch to ON.
    3. Measure the voltage between the auto headlight beam leveler Control Module connector and chassis ground.

      Connector & terminal

      (B150) No. 10 (+) - Chassis ground (-):

      Is the voltage 8 - 16 V?

      Yes:  Replace the headlight assembly. Refer to LIGHTING SYSTEM>HEADLIGHT ASSEMBLY .

      No:  Go to  9.

  9. CHECK HARNESS BETWEEN AUTO HEADLIGHT BEAM LEVELER Control Module AND HEADLIGHT ASSEMBLY (ACTUATOR) (OPEN CIRCUIT). 
    1. Disconnect the connector of headlight assembly.
    2. Measure the continuity between the auto headlight beam leveler Control Module connector and headlight assembly (actuator) connector.

      Connector & terminal

      • Headlight beam leveler RH 

        (B150) No. 10 - (F126) No. 10:

        (B150) No. 17 - (F126) No. 11:

        (B150) No. 11 - (F126) No. 12:

      • Headlight beam leveler LH 

        (B150) No. 10 - (F125) No. 10:

        (B150) No. 17 - (F125) No. 11:

        (B150) No. 11 - (F125) No. 12:

      Is there continuity?

      Yes:  Replace the auto headlight beam leveler Control Module. Refer to LIGHTING SYSTEM>AUTO HEADLIGHT BEAM LEVELER CONTROL MODULE .

      No:  Repair the open circuit or poor contact of the connector in the harness between headlight assembly and auto headlight beam leveler Control Module.

  10. CHECK DTC. 

    Read the DTC using Subaru Select Monitor. Refer to AUTO HEADLIGHT BEAM LEVELER SYSTEM (DIAGNOSTICS)>READ DIAGNOSTIC TROUBLE CODE (DTC) .

    Are any DTCs displayed?

    Yes:  Perform the diagnosis for the displayed DTCs. Refer to AUTO HEADLIGHT BEAM LEVELER SYSTEM (DIAGNOSTICS)>LIST OF DIAGNOSTIC TROUBLE CODE (DTC)>LIST .

    No:  Replace the auto headlight beam leveler Control Module. Refer to LIGHTING SYSTEM>AUTO HEADLIGHT BEAM LEVELER CONTROL MODULE .

scientia non olet · About LEMON Manuals