System Description: Notes

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

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 or 2ND position (or if the auto light system is activated) the BCM (body control module) receives input signal requesting the illumination lamps to illuminate. This input signal is communicated to the IPDM E/R (intelligent power distribution module engine room) across the CAN communication lines. The central processing unit of the IPDM E/R (intelligent power distribution module engine room) controls the tail lamp relay coil. This relay, when energized, directs power to the illumination lamps, which then illuminate.

Power is supplied at all times to tail lamp relay, located in the IPDM E/R (intelligent power distribution module engine room).

Power is also supplied at all times

to BCM (body control module) terminal 70
through 50A fusible link (letter f , located in the fuse and fusible link box)
to CPU (central processing unit) in the IPDM E/R (intelligent power distribution module engine room)
through 20A fuse [No. 53 located in the IPDM E/R (intelligent power distribution module engine room)]
to combination meter terminal 8
through 10A fuse [No. 19 located in fuse block (J/B)] and
to ignition relay [located in the IPDM E/R (intelligent power distribution module engine room)] from battery.

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

to BCM (body control module) terminal 38
through 10A fuse (No. 59, located in the fuse and relay box)
to ignition relay in the IPDM E/R (intelligent power distribution module engine room)
to combination meter terminal 24
through 10A fuse [No. 14 located in the fuse block (J/B)].

Ground is supplied

to BCM (body control module) terminal 67 and
to combination meter terminal 17
through grounds M57, M61, and M79
to IPDM E/R (intelligent power distribution module engine room) terminals 38 and 59
through grounds E9, E15 and E24.