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. 32, located in the fuse block (J/B) No. 2].
- to driver door control unit (LCU01) terminal 14
- to passenger door control unit, rear LH door control unit and rear door RH control unit terminal 6
- through 40 A fusible link [No. H, located in the fuse, fusible link and relay box]

Ground is supplied at all times
- to BCM terminals 56 and 113
- to driver door control unit (LCU01) terminal 15
- to passenger door control unit, rear LH door control unit and rear RH door control unit terminal 7
- through grounds M24, M114, B17, B57, B217 and B256

When the key switch is ON position (key is inserted in ignition key cylinder), power is supplied
- to BCM terminal 69
- through key switch terminals 3 and 4.When the ignition switch is ON or START 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 BCM terminal 142 (driver side), 37 (passenger side).
- through door switch terminal 1
- though front door switch case ground

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

When door is unlocked, ground is supplied
- to driver door control unit (LCU01) terminal 6 or passenger, rear LH, RH door control unit terminal 13.
- through each door unlock sensor terminals 2 and 4
- through grounds M24, M114, B17, B57, B217 and B256

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 via 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)