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Home >> Mazda >> 2018 >> CX-3 Touring, FWD >> Repair and Diagnosis >> Electrical >> Charging Systems >> Battery Inspection >> Parasitic Draw

Parasitic Draw

CAUTION:
  • Operating electrical loads while the parasitic draw is being measured can damage the tester.
  1. Verify that the ignition is switched off and all doors, the bonnet and trunk/liftgate are closed.
  2. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
  3. Connect the tester between the negative battery terminal and negative battery cable.
    NOTE:
    • If the battery is not left undisturbed for 10 min or more, but less than 30 min, the tester will indicate a high value (approx. 300 mA).
    • If the push button start or any electrical accessory is operated after the tester is connected, the battery must be left undisturbed for 10 min or more, but less than 30 min from that point.
    • For vehicles with the immobilizer system, the system periodically shifts synchronization of the security indicator light flashing. Therefore, 65 mA (0.1 s) current is supplied when the security indicator light is illuminated, and 40 mA (2 s) current is supplied when the security indicator light is not illuminated. In addition, the measuring instrument, which shows the average value, indicates around 55 mA.
  4. Leave the vehicle electrical system undisturbed for 10 min or more, but less than 30 min, and then measure the parasitic draw.
    • If not within specification, measure the parasitic draw while removing the fuses one by one from the inside of the relay and fuse block and the inside of the fuse block.
    • Inspect and repair wiring harnesses and connectors of the fuse where the current draw has decreased.

      Battery parasitic draw (When the ignition is off, all doors and the bonnet are closed.) 

      40-65 mA

    NOTE:
    • If the battery is left for 30 min or more, a battery parasitic draw value of 25-45 mA is indicated.