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Circuit Operation

This circuit judges the signals of each switch ("COAST/SET", "ACC/RES" and "CANCEL(" of the auto-cruise control switch. The PCM detects the state of the auto-cruise control switch by sensing the voltages shown below.

When all switches are OFF: 4.7-5.3 volts
When the "CRUISE" (MAIN) switch is "ON": 0-0.3 volt
When the "COAST/SET" switch is ON: 2.1-2.7 volts
When the "ACC/RES" switch is ON: 3.3-4.0 volts
When the "CANCEL" switch is ON: 0.8-1.5 volts