DTC P0A3B: Generator/Alternator Over Temperature: Notes

DTC detecting condition:

Immediately at fault recognition

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode Ref. to ENGINE (DIAGNOSTICS) (H4DO)>Clear Memory Mode>OPERATION , and inspection mode Ref. to ENGINE (DIAGNOSTICS) (H4DO)>Inspection Mode>PROCEDURE .

Use the check board when measuring the ECM terminal voltage and resistance.

CHECK GENERATOR.
Check the generator vent window.

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 leave it for 20 minutes or more.
2. Start the engine and check the charge warning light.
Does the charge warning light remain on?

Yes: Replace the generator. Ref. to STARTING/CHARGING SYSTEMS(H4DO)>GENERATOR

No: 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.