Power Supply And Ground

WARNING: This page is about a different car, the 2005 Nissan 350Z. However, it is still accessible from the selected car via links, so may be relevant.

Power is supplied at all times

Through 10A fuse [No. 21, located in fuse block (J/B)]
To key switch terminal 2,
Through 10A fuse [No. 18, located in fuse block (J/B)]
To BCM terminal 42,
Through 40A fusible link (letter F, located in fuse, fusible link and relay box)
To BCM terminal 55.

When key is removed from ignition key cylinder, power is interrupted

Through key switch terminal 1
To BCM terminal 37.

With ignition switch in ON or START position, power is supplied

Through 10A fuse [No. 1, located in fuse block (J/B)]
To BCM terminal 38.

When room lamp and vanity mirror lamp power is supplied at times

Through BCM terminal 41
To map lamp terminal 3 (Coupe models)
To map lamp terminal 2 (Roadster models)
To luggage room lamp terminal 1 (Coupe models)
To trunk room lamp terminal 1 (Roadster models)
To vanity mirror lamp LH and RH terminal 1.

Ground is supplied

To BCM terminal 52
Through grounds M30 and M66.

When driver side door is opened, ground is supplied

Through case ground of driver side door switch
To BCM terminal 62.

When passenger side door is opened, ground is supplied

Through case ground of passenger side door switch
To BCM terminal 12.

When back door is opened, ground is supplied (Coupe models)

Through grounds B5, B6, D105 and T14
To back door switch terminal 3
From back door switch terminal 1
To BCM terminal 58.

When trunk hood is opened, ground is supplied (Roadster models)

Through grounds B5, B6 and T1
To trunk room lamp switch terminal 2
Through trunk room lamp switch terminal 1
To BCM terminal 57.

When the driver side door or passenger side door is unlocked by door lock and unlock switch, The BCM receives unlock signal with power window serial link

Through grounds M30 and M66
To power window main switch (door lock and unlock switch) terminal 15 or power window sub switch (door lock and unlock switch) terminal 11
Through power window main switch (door lock and unlock switch) terminal 12 and power window sub switch (door lock and unlock switch) terminal 16
To BCM terminal 22.

When the driver side door is unlocked by door key cylinder switch, The BCM receives information by communicating with power window main switch

Through grounds M30 and M66
To door key cylinder switch terminal 2
Through door key cylinder switch terminal 1
To power window main switch terminal 7
Through power window main switch (door lock and unlock switch) terminal 12
To BCM terminal 22.

When a signal, or combination of signals is received by BCM, ground is supplied

Through BCM terminal 48
To map lamp terminal 2 (Coupe models)
To map lamp terminal 3 (Roadster models).

With power and ground are supplied, map lamp illuminates.