Power Supply And Ground

WARNING: This page is about a different car, the 2009 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.

Power is supplied at all times

through 20A fuse (No. 31, located in fuse and fusible link box)
to audio unit terminal 19,
through 15A fuse (No. 52, located in the IPDM E/R)
to CPU of the IPDM E/R,
through 20A fuse (No. 53, located in the IPDM E/R)
to CPU of the IPDM E/R,
through 50A fusible link (letter j, located in the fuse and fusible link box)
to BCM terminal 70,
through 10A fuse [No. 21, located in the fuse block (J/B)]
to BCM terminal 57.
When the ignition switch is in ACC or ON position, power is supplied
through 10A fuse [No. 6, located in fuse block (J/B)]
to audio unit terminal 7 and
to BCM terminal 11.
When the ignition switch is in ON or START position, power is supplied
to ignition relay located in the IPDM E/R,
through 10A fuse [No. 12, located in fuse block (J/B)]
to BCM terminal 38.
Ground is supplied
to BCM terminal 67
through body grounds M57 and M61,
to IPDM E/R terminals 39 and 59
through body grounds E9, E15 (all models) and E24 (with MR20DE).