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, perform the clear memory of [Headlight/Foglight]. Ref. to COMMON (diag)>CLEAR MEMORY .
   4. Read the DTC of [Headlight/Foglight] using the Subaru Select Monitor, Ref. to HEADLIGHT/FOGLIGHT (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC B2900 displayed? (Current malfunction)

   Yes  : Replace the auto headlight beam leveler Control Module. Ref. 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.