Examination
1. The starter open circuit switch is located near the upper end of the clutch pedal. Two wires are connected to the sensor-switch, one is from the starter enable relay, the second is ground. When the ignition key is turned to the START position and the clutch pedal is depressed, due to the operation of the sensor-switch, the starter relay is shorted to ground, which leads to the activation of the latter's electric motor.
2. If the engine does not turn over when the clutch pedal is depressed, it is necessary to adjust the sensor-switch, then try again. If the adjustment does not help to achieve the desired result, check the condition of the sensor-switch and, if necessary, replace the latter. If the engine starts with the clutch pedal released, adjust the switch and try again.
3. If, when the clutch pedal is depressed, the engine does not turn over, therefore, either the conductivity between the sensor-switch terminals is broken, or the starter relay is not supplied with power to the latter.
4. Check the power supply with a voltmeter or test lamp. When turning the ignition key to the START position and depressing the pedal, there should be voltage on the wire coming from the starter relay. If there is no voltage, check the wiring between the relay and the sensor-switch for an open circuit. If power is supplied properly, check for voltage on the opposite side of the sensor-switch (with the clutch pedal depressed). The presence of voltage on both sides of the sensor-switch confirms the serviceability of its functioning. Try to make an adjustment. If there is no voltage, replace the sensor-switch.
Replacement
Disconnect the electrical connector, loosen the adjusting nut and unscrew the sensor switch from its support bracket. Installation is in the reverse order.
Adjustment
Loosen the locknut and, by rotating the sensor-switch, achieve the presence of conductivity between its terminals with the clutch pedal depressed.