Power Locks: Description and Operation

POWER DOOR LOCK SYSTEM

System Description

POWER SUPPLY AND GROUND
Power is supplied at all times
- to BCM terminal 105
- through 10 A fuse [No. 3, located in the fuse block (J/B) No. 1].
- to key switch terminal 3
- through 10 A fuse [No. 8, located in the fuse block (J/B) No. 2].

When the key switch is ON position (key is inserted in ignition key cylinder), power is supplied
- to BCM terminal 69
- through key switch terminal 4.

When the ignition switch is ON position, power is supplied
- to BCM terminal 68
- through 10 A fuse [No.1, located in the fuse block (J/B) No. 1].

When front door switch is ON (front door is opened), ground is supplied
- to front door switch case ground
- through door switch terminal 1
- through BCM terminal 142 (driver side), 37 (passenger side).

When rear door switch is ON (rear door is opened), ground is supplied
- to body grounds B17 and B57 (rear LH), B217 and B256 (rear RH)
- through door switch terminals 1 and 2
- through BCM terminal 33 (rear LH), 143 (rear RH).

When door is unlocked, ground is supplied
- to each door unlock sensor terminal 4
- through each door unlock sensor terminal 2
- through driver door control unit (LCU01) terminal 6 or passenger, rear LH, RH door control unit terminal 2.

When the door is locked with the emergency key, ground is supplied
- to LCU01 terminal 10
- through front door key cylinder switch terminals 2 and 3
- through grounds M24 and M114.

When the door is unlocked with the emergency key, ground is supplied
- to LCU01 terminal 9
- through front door key cylinder switch terminals 1 and 2
- through grounds M24 and M114.

BCM is connected to LCU01 as DATA LINE A-3.

OPERATION
- The lock & unlock switch on driver's door trim and passenger's door trim can lock and unlock all doors.
- With the door key inserted in the key cylinder on front LH door, turning it to LOCK, will lock all doors; turning it to UNLOCK once unlocks the corresponding door; turning it to UNLOCK again within 5 seconds after the first unlock operation unlocks all of the other doors. (Signals from front door key cylinder switch)

Key Reminder Door System
However, if the electronic key is in the electronic key cylinder and one or more of the front doors are open, setting the lock & unlock switch to LOCK locks the doors once but then immediately unlocks them. (Combination signals from key switch, door switch)