Subaru Crosstrek Service Manual: Dtc b2900 ahl control

DTC DETECTING CONDITION:

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

TROUBLE SYMPTOM:

The auto headlight beam leveler does not operate.

CAUTION:

Initialization is required after replacing the auto headlight beam leveler CM.

1.CHECK DTC.

1) Turn the ignition switch to OFF > ON.

2) Turn on the headlight low beam.

3) Using the Subaru Select Monitor, clear the auto headlight beam leveler system memory. Clear Memory Mode">

4) Turn the ignition switch to OFF > ON.

5) Use the Subaru Select Monitor and read DTCs. Read Diagnostic Trouble Code (DTC)">

Is DTC B2900 displayed? (current malfunction)

Replace the auto headlight beam leveler CM. Auto Headlight Beam Leveler Control Module">

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.

Dtc u0140 lost communication with body control module

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