Starter Solenoid Test

Disconnect the field coil wire from the M-terminal of solenoid switch.
Connect the battery as shown. If the starter pinion pops out (engages), it is working properly. To avoid damaging the starter, do not leave the battery connected for more than 10 seconds.

Fig 1: Connecting Battery To Starter Solenoid
Courtesy of KIA MOTORS AMERICA, INC.
Disconnect the battery from the M terminal.
If the pinion does not retract, the hold-in coil is working properly. To avoid damaging the starter, do not leave the battery connected for more than 10 seconds.

Fig 2: Disconnecting Battery From M Terminal
Courtesy of KIA MOTORS AMERICA, INC.
Disconnect the battery also from the body. If the pinion retracts immediately, it is working properly. To avoid damaging the starter, do not leave the battery connected for more than 10 seconds.

Fig 3: Disconnecting Battery From Body

Courtesy of KIA MOTORS AMERICA, INC.