Test H: Door Courtesy Switch Circuit

The door courtesy switch comes ON when the door is opened and goes OFF when the door is closed. Futhermore, the door courtesy switch circuit has terminal +B connected inside the theft deterrent ECU. Battery voltage is applied to terminal CTY of the wireless door lock ECU when all doors are closed (i.e., when the door courtesy switch of all doors are off).

Fig 1: Door Courtesy Switch Circuit Diagnostic

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Fig 2: Door Courtesy Switch Circuit Test

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