Power Supply And Ground
WARNING: This page is about a different car, the 2003 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.
Power is supplied at all times
- to BCM terminal 105
- through 10A fuse [No. 3, located in the fuse block (J/B) No. 1]
- to key switch terminal 3
- through 10A fuse [No. 32, 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 or START position, power is supplied
- to BCM terminal 68
- through 10A 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) or 37 (passenger side)
- through front door switch terminal 1
- through front door switch case ground.
When rear door switch is ON (rear door is opened), ground is supplied
- to BCM terminal 33 (rear LH) or 143 (rear RH)
- through rear door switch terminal 1 and 2
- through body ground B17 and B57 (rear LH) or 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 2
- through each door unlock sensor terminal 2
- through each door unlock sensor terminal 4
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.