Circuit Test: (M/T)
- Measure voltage between ground and terminal "B" (positive battery cable post) at starter motor. If 10 volts or more exists, go to next step. If less than 10 volts exists, check battery and battery cables. Repair as necessary.
- Disconnect Red/Yellow wire from terminal "S" at starter motor. Turn ignition switch to START position. Depress clutch pedal. Measure voltage between ground and Red/Yellow wire. If less than 10 volts exists, go to next step. If 10 volts or more exists, replace starter.
- Remove starter interlock relay, located on brake pedal bracket. Turn ignition switch to START position. Measure voltage between ground and terminals No. 2 and No. 4 at starter interlock relay harness connector. See Fig 1
. If 10 volts or more exists, go to next step. If less than 10 volts exists, check Blue/Red wire for open and/or short, repair as necessary. If Blue/Red wire is okay, test ignition switch. See IGNITION SWITCH TEST
.
- Apply battery voltage across terminals No. 1 and No. 2 of starter interlock relay. See Fig 1
. Measure continuity between terminals No. 3 and No. 4 of interlock relay. If continuity exists, go to next step. If continuity does not exist, replace starter interlock relay.
- Disconnect clutch switch harness connector. Measure resistance between clutch switch terminals when clutch is depressed. If resistance is 10 ohms or less, go to next step. If resistance is greater than 10 ohms, replace clutch switch.
- Measure resistance in Red/Yellow wire between terminal No. 3 at shift interlock relay harness connector and starter motor harness connector. If resistance is 10 ohms or less, go to next step. If resistance is greater than 10 ohms, repair open and/or short in Red/Yellow wire.
- Measure resistance in Green/Yellow wire between terminal No. 1 at shift interlock relay harness connector and clutch switch harness connector. If resistance is 10 ohms or less, go to next step. If resistance is greater than 10 ohms, repair open and/or short in Green/Yellow wire.
- Measure resistance between ground and Black wire at shift interlock relay harness connector. If resistance is 10 ohms or less, system okay at this time. If resistance is greater than 10 ohms, repair open in Black wire.
Courtesy of SUBARU OF AMERICA, INC.