For Mazda 626/MPV/Protege:
It is not necessary to remove any fuses or relays during PCM reprogramming
when the WDS screen prompts you to do so. You may accidentally stop power to one
of the PCM terminals and cause the PCM to be blanked or you may receive error
messages during the WDS PCM programming procedure.
WDS is a world wide tool. Certain WDS screens appear that may or
may not relate to the Mazda Vehicle you are working on. When performing PCM
module reprogramming, you will be prompted to remove fuses for the fuel pump and
cooling fans to prevent excessive battery drain or electrical interference
during the reprogramming process. For Mazda 626/MPV/Protege - do not remove
any fuses or relays when performing PCM module reprogramming. To ensure
proper and sustained voltage levels, we suggest that you connect a battery
charger to the battery and set the charger to a charge rate of not more than
5-10 amps during the PCM reprogramming process. This will prevent the battery
from dropping below minimum voltage levels during the PCM reprogramming process.
Removing fuses or relays may accidentally cause power to be stopped to certain
PCM power terminals and cause the PCM to be blanked. Or you may receive error
messages during the PCM reprogramming process.