DTC P0A3B: Generator/Alternator Over Temperature: Notes

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DTC detecting condition:

Immediately at fault recognition

Trouble symptom:

Charge warning light illuminates.

NOTE: After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Ref. to ENGINE (DIAGNOSTICS) (H4DO (EXCEPT FOR HEV))>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .

Courtesy of SUBARU OF AMERICA, INC.

CHECK GENERATOR .
Check the generator vent window. Ref. to STARTING/CHARGING SYSTEMS (H4DO (EXCEPT FOR HEV))>GENERATOR>INSPECTION .

Is there clogging with foreign objects?

Yes : Eliminate the foreign objects and leave the generator main body intact approx. 20 minutes to cool down.

No : Go to 2.
CHECK CHARGE WARNING LIGHT .
1. Turn the ignition switch to OFF and wait for at least 20 minutes.
2. Start the engine and check the charge warning light.
  Does the charge warning light remain on?
  
  Replace the generator. Ref. to STARTING/CHARGING SYSTEMS (H4DO (EXCEPT FOR HEV))>GENERATOR .
  
  This is a temporarily overheating of the generator. It is now back to normal state.
  
  Check for clogging with foreign objects in the proximate area such as the generator vent window.