Subaru 23300AA390 Starter Motor Assembly

Do not jump to the conclusion that starting malfunctions are due to a faulty starter. Begin by inspecting battery cable clamps where they connect to the battery terminals for cleanliness and tightness. Inspect battery cables for damage and replace them, if they are defective. Test battery condition, replacing it if it does not pass all of the tests. Check starter wiring and connections for any visible signs of wear; ensure that the starter mounting bolts are tightened securely. Examine any fusible links in starter circuit; replace them if burned out. Visually examine ignition switch circuit as well. Ensure Transaxle Range (TR) sensor or clutch start switch is operating properly, also verify shift lever is in PARK or NEUTRAL (automatic transaxle) or clutch pedal is fully depressed (manual transaxle). When you turn the ignition switch to START position and hear no actuation from the starter motor, check solenoid for voltage with a multimeter. If there's no voltage, test again the electrical fuse connected to ignition switch and then check the relay of your starter motor for continuity with a tester. Or there may be voltage at solenoid but no operation at all when attempting to start this vehicle by turning on its ignition key; hence remove it on bench having tested all these components separately one after another since they will help confirm my diagnosis above that I had already made before this systematic procedure could be performed appropriately according their respective specifications mentioned herein.By this way we have come across many possible causes which we should eliminate step by step until only one root cause remains.If you turn on your car but there is no response at all from starter motor meaning that Solenoid receives power supply 12 volts DC since wires connecting its two terminals have been removed totally so you can conduct a simple bench test removing it alone after having turned off everything else such as radio or CD player,cigarette lighter etc.Any mechanic should consider testing both the cranking voltage for starter motor and current draw as well from the battery.Well, yet if it is still getting power but not working at all, then you can easily remove an ignition switch from car and mount it onto bench in order to see whether or not this component is okay. As a result, we will most likely need to replace the solenoid.

Remove the upper starter motor mounting bolt.