Door Control Switch Circuit
Door Control Switch CircuitDESCRIPTION
When the lock side of the door control switch is pressed, continuity is established between terminals 6 and 3 of the switch. When the unlock side of the switch is pressed, continuity is established between terminals 5 and 3.
Terminals PML and PMUL of the 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 body ECU constantly applies voltage to terminal 6 of the door control switch via terminal PML. When the door control switch is operated to lock all doors, current flows from terminal PML to terminal 6. The body ECU determines that this is door lock request signal input.
The body ECU also applies constant voltage to terminal 5 of the door control switch via terminal PMUL. When the door control switch is operated to unlock the doors, current flows from terminal PMUL to terminal 5. The body ECU determines that this is door unlock request signal input.
Wiring Diagram:
Step 1:
Step 1(Continued)-2:
INSPECTION PROCEDURE