Front Door Switch Input Circuit

When the front door is closed (the door switch is switched OFF), HIGH-level signals are sent to the electronic control unit; when the front door is opened (the door switch is switched ON), LOW-level signals are sent to the electronic control unit. See Fig 1 and Fig 2 .

Fig 1: Testing ETACS Door Switch Voltage

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 2: Testing Driver's Door Switch Resistance

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.