Insulation Resistance of Case

1. Remove the high-tension lead (L3 engine model). (See HIGH-TENSION LEAD (L3) REMOVAL/INSTALLATION .)
2. Disconnect the ignition coil connector.
3. Measure the insulation resistance from terminal B (L3 engine model), terminal A (AJ engine model) to ignition coil case using an ohmmeter.
   Fig 1: Measuring Resistance Between Terminal B (L3 Engine Model)

   Courtesy of MAZDA MOTORS CORP.
   • If not as specified, replace the ignition coil.

Specification 

10 megohms or more