Circuit Operation

This circuit judges the signals of each switch (OFF, SET, RESUME, CANCEL and MAIN) of the auto-cruise control switch. The auto-cruise control-ECU detects the state of the auto-cruise control switch by sensing the voltages.

1. When all switches are OFF, the ECU detects 0.4-2.3 volts.
2. When the SET switch is ON, the ECU detects 2.3-3.5 volts.
3. When the CANCEL switch is ON, the ECU detects 0.4 volts or less.
4. When the main switch is ON, the ECU detects 7.0 volts.