SRX AWD V8-4.6L VIN A (2004)
Power Door Lock Switch: Description and Operation
POWER DOOR LOCK SWITCHES
The front passenger door lock switch is wired to the front passenger door module. The lock switch is supplied battery voltage and ground by the front
passenger door module. There are 2 circuits for voltage, one for a lock signal, and one for an unlock signal. The module supplies ground to the switch
via a 3rd circuit. When the switch is activated for a lock or unlock function, the normally open switch contacts for that function are closed and voltage
flows through the switch, providing the module with the appropriate signal input.
The driver door lock switch is similar to the front passenger door lock switch, but it is wired to the driver door switch assembly (DDSA), and, for a
ground circuit, to the driver door module. It also works the same way as the front passenger door lock switch works, but the switch activations are
detected and processed by the DDSA and less voltage is required for lock switch operation. The DDSA has two circuits that each supply 5 volts to the
driver door lock switch, one for a lock signal, and one for an unlock signal. The driver door lock switch ground circuit is provided by the driver door
module. When the door lock switch is activated, the normally open switch contacts for that function are closed, the voltage flows through the switch and
is detected by the DDSA. The DDSA then relays the switch information to the driver door module via the class 2 serial data circuit. The endgate/liftgate
door and rear passenger doors are not provided with power door lock switches.
