DTC B2900: AHL Control

DTC detecting condition:

Detected when internal malfunction occurs in the auto headlight beam leveler Control Module.

Trouble symptom:

The auto headlight beam leveler does not operate.

1. CHECK DTC. 
   1. Turn the ignition switch OFF - ON.
   2. Turn on the headlight low beam.
   3. Using the Subaru Select Monitor, clear the auto headlight beam leveler system memory. Refer to AUTO HEADLIGHT BEAM LEVELER SYSTEM (DIAGNOSTICS)>CLEAR MEMORY MODE .
   4. Turn the ignition switch to OFF - ON.
   5. Read the DTC using Subaru Select Monitor. Refer to AUTO HEADLIGHT BEAM LEVELER SYSTEM (DIAGNOSTICS)>READ DIAGNOSTIC TROUBLE CODE (DTC) .

      Is DTC B2900 displayed? (Current malfunction)

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

      No:  Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

      NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.