Driver Side Door Key Lock and Unlock Switch Circuit
Driver Side Door Key Lock and Unlock Switch CircuitDESCRIPTION
The driver's door key lock and unlock switch is built into the driver's door lock assembly.
When the driver's door key cylinder is turned to lock all the doors by key, there is continuity between terminals L and E of the key lock and unlock switch. When the cylinder is turned to unlock the door(s), there is continuity between terminals UL and E.
Terminals KL and KUL of the multiplex network master switch assembly are connected to the door lock assembly, and door lock/unlock request signals (by key) are input to the multiplex network master switch assembly.
The multiplex network master switch assembly constantly applies voltage to terminal L of the driver's door lock assembly via terminal KL. When the driver's door key cylinder is turned to lock all the doors by key, current flows from terminal KL to terminal L. The multiplex network master switch assembly determines that this is door lock request signal input and sends a door lock signal to the main body ECU RH using multiplex communication.
The multiplex network master switch assembly also applies constant voltage to terminal UL of the door lock assembly via terminal KUL. When the door key cylinder is turned in the direction to unlock the door(s) by key, current flows from terminal KUL to terminal UL. The multiplex network master switch assembly determines that this is door unlock request signal input and sends a door unlock signal to the main body ECU RH using multiplex communication.
Wiring Diagram:
Step 1-2:
Step 3:
INSPECTION PROCEDURE