Disconnect the wires from the S terminal and the M terminal. Make the connections as described below using as heavy a wire as possible (preferably equivalent to the wire used for the vehicle). To avoid damaging the starter, never leave the battery connected for more than 10 seconds. Connect the battery as shown. If the starter pinion moves out, it is working properly. Disconnect the battery from the M terminal. If the pinion does not retract, the hold-in coil is working properly.

Disconnect the battery from the body. If the pinion retracts immediately, it is working properly. Clamp the starter firmly in a vice. Connect the starter to the battery as described in the diagram below, and confirm that the motor starts and keeps rotating. If the electric current and motor speed meet the specifications when the battery voltage is at 11.5 V, the starter is working properly. Specifications: Electric current: 90 A or less Motor speed: 3,000 rpm (min-1) or more