Solenoid Test

Disconnect starter field coil lead from terminal "C". Connect battery to starter solenoid as indicated. See Fig 1 or Fig 2 . Perform STEP 1. Clutch pinion gear should move outward. If clutch pinion gear does not move outward, replace starter solenoid. If clutch pinion gear moves outward, go to next step.
Leave battery connected. Disconnect jumper lead from terminal "C". Perform STEP 2. Clutch pinion gear should remain in outward position. If clutch pinion gear does not remain in outward position, replace starter solenoid. If clutch pinion gear remains in outward position, go to next step.
Disconnect jumper lead from starter housing. Perform STEP 3. Clutch pinion gear should move inward. If clutch pinion gear does not move inward, replace starter solenoid. If clutch pinion gear moves inward, starter solenoid is okay.

Fig 1: Bench Testing Starter (ES300 & RX300)

Fig 2: Bench Testing Starter (GS300, GS430, IS300 & LS430)