System Outline

Current always flows to TERMINAL (B) 9 of the theft deterrent and door look control ECU through the DOOR fuse, and to TERMINAL (A) 1 through the DOME fuse.

When the ignition SW is turned ON, the current flowing through the ECU-IG fuse to TERMINAL (B) 7 of the ECU to TERMINAL (B) 6 flows through the coil side of power main relay to GROUND, causing the relay to operate. The current flowing through the PWR fuse flows to the door lock control switches, causing the indicator light to light up.

1. MANUAL LOCK OPERATION
When the door lock control SW or door key lock and unlock SW are turned to LOCK position, a lock signal is input to TERMINAL (A) 5, (A) 22 (Key SW) of the theft deterrent and door lock control ECU and causes the ECU to function. Current flows from TERMINAL (B) 9 of the ECU to TERMINAL (B) 3 to TERMINAL 5 of the door lock motors to TERMINALS 2 to TERMINALS (B) 5 (LH), (B) 2 (RH) of the ECU to TERMINAL (B) 4 to GROUND and the door lock motor causes the door to lock.

2. MANUAL UNLOCK OPERATION
When the door lock control SW or door key lock and unlock SW are turned to UNLOCK position, an unlock signal is input to TERMINAL (A) 6, (A) 8 (Key SW LH) or (A) 16 (Key SW RH) of the theft deterrent and door lock control ECU and causes the ECU to function. Current flows from TERMINAL (B) 9 of the ECU to TERMINALS (B) 5 (LH), (B) 2 (RH) to TERMINAL 2 of the door lock motors to TERMINALS 5 to TERMINAL (B) 3 of the ECU to TERMINAL (B) 4 to GROUND and the door lock motor causes the door to unlock.

When unlock operation occurs using the LH door key SW, performing the unlock operation once unlocks only the driver's door. To unlock all the other doors together, the unlock operation must be performed again within 3 seconds of the first operation.

3. IGNITION KEY REMINDER OPERATION
* Operation of door lock button (Operation of door lock motors)
When the ignition key is in the cylinder (Key unlock warning SW ON) and the door is opened and locked using door lock button (Door lock motor), the door is locked once but each door is unlocked soon by the operation of the theft deterrent and door lock control ECU. As a result of ECU activation, the current flows from TERMINAL (B) 9 of the ECU to TERMINALS (B) 5 (LH), (B) 2 (RH) to TERMINAL 2 of the door lock motors to TERMINALS 5 to TERMINAL (B) 3 of the ECU to TERMINAL (B) 4 to GROUND and causes all the doors to unlock.

The same applies to operation of the door lock control SW and door lock key SW.

* Keyless lock operation
When the ignition key is still inserted in the cylinder (Key unlock warning SW ON), the door is open and unlock operation is prevented by keeping the door lock button pressed to the lock side, the door is kept in the lock condition. If the door is then closed, a signal is input to the ECU from the door courtesy SW. This activates the ECU and each door is unlocked.