Power Supply And Ground

WARNING: This page is about a different car, the 2004 Infiniti M45 and 2003 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

When ignition switch is in the ON or START position, power is supplied:

through 10A fuse [No. 12, located in the fuse block (J/B) NO.1]
to ASCD control unit terminal 5 and
through ASCD brake switch terminal 1 and 2.
to park/neutral position relay terminal 3.
through 10A fuse [No. 9, located in the fuse block (J/B) NO.1]
to combination meter terminal 40 and 42.

Power is supplied at all times:

through 15A fuse [No. 17, located in the fuse block (J/B) NO.1]
to the stop lamp switch terminal 1.

When park/neutral position is in the P or N position, ground is supplied:

to park/neutral position relay terminal 2
through body grounds E24 and E42.

When MAIN (CRUISE) switch is depressed (ON), ground is supplied:

to ASCD steering switch terminal 2
from ASCD control unit terminal 11.
to ASCD control unit terminal 24
from ASCD steering switch terminal 1.

then ASCD control unit holds CRUISE condition and illuminates CRUISE indicator. Ground is supplied:

to combination meter terminal 60
from ASCD control unit terminal 15.