Supra L6-2997cc 3.0L DOHC MFI (1998)
Power Locks: Description and Operation
Current always flows to TERMINAL (A) 9 of the theft deterrent and door lock control ECU through the DOOR fuse, and to TERMINAL (B) 1
through the DOME fuse.
When the ignition SW turned ON, the current flowing through the ECU-IGfuse to TERMINAL (A) 7 of the ECU to TERMINAL (A) 6 flows through
the coil side of the power main relay to GROUND, causing the relay to operate. The current flowing through the DOOR 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 pushed to LOCK position, a lock signal is input to TERMINAL (B) 5, (B)
22 (door lock and unlock SW) of the theft deterrent and door lock control ECU and causes the ECU to function. Current flows from TERMINAL
(A) 9 of the ECU to TERMINAL (A) 3 to TERMINAL 2 (LH), TERMINAL 4 (RH) of the door lock motors to TERMINAL 4 (LH),
TERMINAL 2 (RH) to TERMINAL (A) 2 of the ECU to TERMINAL (A) 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 pushed to UNLOCK position, an unlock signal is input to TERMINAL (B)
8, (B) 6 (door lock and unlock SW LH) or (B) 16 (door lock and unlock SW RH) of the theft deterrent and door lock control ECU and causes to
function. Current flows from TERMINAL (A) 9 of the ECU to TERMINAL (A) 2 to TERMINAL 4 (LH), TERMINAL 2 (RH) of the door
lock motors to TERMINAL 2 (LH), TERMINAL 4 (RH) to TERMINAL (A) 3 of the ECU to TERMINAL (A) 4 to GROUND and the door
lock motor causes the door to unlock.
When unlock operation occurs using the door key lock and unlock SW LH, doing the unlock operation once unlocks only the LH door. To unlock
all the other doors together, unlock operation must be done 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 (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 (A) 9 of the ECU to TERMINAL (A) 2 to TERMINAL 4 (LH), TERMINAL 2 (RH) of the
door lock motors to TERMINAL 2 (LH), TERMINAL 4 (RH) to TERMINAL (A) 3 of the ECU to TERMINAL (A) 4 to GROUND and
causes all the door lock control SW and door key lock and unlock SW.
* Keyless lock operation
When the ignition key is still inserted in the cylinder (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 theft
deterrent and door look control ECU from the door courtesy SW. This activates the ECU and each door is unlocked.
