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.

CAUTION: Initialization is required after replacing the auto headlight beam leveler Control Module. Ref. to LIGHTING SYSTEM>AUTO HEADLIGHT BEAM LEVELER SYSTEM>PROCEDURE .

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 any of DTC B2900, B2916, B2917, B2918, B2919 or B291A 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.