System Description: Notes

WARNING: This page is about a different car, the 2006 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

The control of the illumination lamps operation is dependent upon the position of the lighting switch (combination switch). When the lighting switch is placed in the 1ST position, 2ND position or AUTO position (headlamp is ON), BCM (body control module) receives input signal requesting the illumination lamps to illuminate. This input signal is communicated to IPDM E/R (intelligent power distribution module engine room) through CAN communication lines. CPU (central processing unit) located in the IPDM E/R controls the tail lamp relay. This relay, when energized, directs power to the illumination lamps, which then illuminate.

Power is supplied at all times

to ignition relay located in IPDM E/R, from battery direct,
through 10A fuse (No. 71, located in IPDM E/R)
to CPU located in IPDM E/R and
to tail lamp relay, located in IPDM E/R,
through 15A fuse (No. 78, located in IPDM E/R)
to CPU located in IPDM E/R,
through 50A fusible link (letter F, located in fuse, fusible link and relay box)
to BCM terminal 55,
through 10A fuse [No.18, located in fuse block (J/B)]
to BCM terminal 42.

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

to ignition relay located in IPDM E/R, from battery direct,
through 10A fuse [No.1, located in fuse block (J/B)]
to BCM terminal 38,
through 10A fuse [No.14, located in fuse block (J/B)]
to combination meter terminals 22 and 23,
through 10A fuse [No.12, located in fuse block (J/B)]
to NAVI control unit terminal 63 (with navigation system) and
to display and A/C auto amp. terminal 2.

With the ignition switch in the ACC or ON position, power is supplied

through 10A fuse [No.6, located in fuse block (J/B)]
to BCM terminal 11
to combination meter terminal 18
to NAVI control unit terminal 5 (with navigation system)
to display unit terminal 19 (with navigation system) and
to NAVI switch terminal 1 (with navigation system).

Ground is supplied

to BCM terminal 52
to combination meter terminals 1, 24 and 25
to NAVI control unit terminals 1 and 21 (with navigation system)
to display unit terminals 22 and 24 (with navigation system)
to NAVI switch terminal 7 (with navigation system) and
to display and A/C auto amp. terminal 5
through grounds M30 and M66,
to IPDM E/R terminals 38 and 60
through grounds E17 and E47.