1-7 3. Insulation resistance inspection Use an insulation resistance meter (megohmmeter) and measure the resistance between the battery and battery case. Insulation resistance:1 M Ω or more Note: When the insulation resistance is less than 1 M Ω , wash the battery with water after removing it from the vehicle. Fully dry the washed battery and measure the insulation resistance again. Install the battery on the vehicle after confirming that the insulation resistance is 1 M Ω or more. * Battery control table Prepare a control table for each battery to record and maintain the inspection results.