Door Control Switch Circuit
Door Control Switch CircuitDESCRIPTION
When the lock side of the door control switch is pressed, continuity is established between terminal 2 and terminal 3 of the switch. When the unlock side of the switch is pressed, continuity is established between terminal 4 and terminal 3.
Terminals L1 and UL1 of the main body ECU are connected to the door control switch and door lock/ unlock request signals (by door control switch operation) are input to the ECU.
The main body ECU constantly applies voltage to terminal 2 of the door control switch via terminal L1. When the door control switch is operated to lock all doors, current flows from terminal L1 to terminal 2.
The main body ECU determines that this is door lock request signal input.
The main body ECU also applies constant voltage to terminal 4 of the door control switch via terminal UL1. When the door control switch is operated to unlock the doors, current flows from terminal UL1 to terminal 4. The main body ECU determines that this is door unlock request signal input.
Wiring Diagram:
Step 1-2:
Step 2 (Continued):
INSPECTION PROCEDURE