Beijing BJ2020S type sport utility vehicle starter operation weakness

        After BJ2020S a Beijing-road vehicles, the starter is damaged, replace the same model (QD321 type) of the starter, but the re-start starter when loading operation weakness.
        Troubleshooting:
     (A) Failure Cause Analysis
        Replacing the battery is new, the starting power heavy duty diagnostic tool circuit has also been confirmed that it is normal, then the quality is just replacing the new starter has a problem? Needs to be checked.
     (2) Troubleshooting Methods
        Remove the front cover of the dust jacket starter, starter solenoid when restarting found completely pull the switch, and see a strong spark at the fork. Judgment based on experience, should be the starter failure caused by poor grounding.
        To verify this judgment, with a thicker wire overlap between the starter housing and the engine block, when the re-start, fault disappears, indicating that indeed a bad starter Ground.
        Remove the starter careful examination, found in the starter drive and flywheel housing cover only parts of the installation mouth thick black paint, which is the cause of bad starter Ground lies.
     (3) failure treatment measures
        Paint the Department cleaned, re-loading start, starter normal operation, troubleshooting.
        Failure Analysis: When the starter factory, outside coated with a layer of protective VAG K+CAN V4.8 paint to prevent rust. When replacing the starter while ignoring the leading end of the starter portion of the cleaning, resulting in a poor and can not start the starter to ground fault.
        Tip this example: In the car repair process, we should pay attention to the new replacement parts for inspection and cleaning, but also for testing, if necessary, to ensure good new parts replacement, to avoid failure or left hidden faults after loading.
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