Stand logic circuit (Aprilia RS125/3)

Contents: Troubleshooting ↓ Test readings ↓ Neutral light switch test ↓ Stand test ↓ Diode test ↓

Engine starting and ignition are inhibited when the stand is down and/or a gear is engaged.

Troubleshooting

Check the condition of the 15 A fuses.

Check the neutral light switch.

Check the stand switch.

Check the diode.

Check the starter relay; see 8.6.1.

Fit a substitute CDI unit known to be operating correctly.

(The article is reprinted from the website: «Motoinstruction.ru»)

Test readings

Check for continuity across the contacts using a multimeter set to the ohm range. Refer to the diagrams below.

Neutral light switch test

Stand test

Diode test

To test diode operation: Disconnect the two-way connector (1) (coloured white).

Warning! Make sure to refit the connector (1) to the matching connector on assembly

Warning! Make sure to refit the connector (1) to the matching connector on assembly

Place a multimeter in the diode-test mode and measure across the two male terminals accommodated inside the diode as shown in the diagram.

Correct reading (layout A): 0-1 Ω.

Correct reading (layout B): ∞.

If your multimeter does not include a diode-test feature, feed 12 Volts to the diode, fit a 12 V - 2 W bulb to the positive lead and connect the leads to the diode as shown in the diagram.