System Description: Notes

WARNING: This page is about a different car, the 2004 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

Control of the parking, license plate, and tail lamp operation is dependent upon the position of the lighting switch (combination switch). When the lighting switch is placed in the 1st position, the BCM (Body Control Module) receives input signal requesting the parking, license plate, side marker and tail 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 controls the tail lamp relay coil. This relay, when energized, directs power to the parking, license plate, side marker and tail lamps, which then illuminate.

The current that flows by rear combination lamp unit is controlled, and a tail lamp (LED) is made to turn on. Power is supplied at all times

to ignition relay, located in the IPDM E/R (Intelligent Power Distribution Module Engine Room)
through 10A fuse [No. 71, located in the IPDM E/R (Intelligent Power Distribution Module Engine Room)]
to tail lamp relay, located in the IPDM E/R (Intelligent Power Distribution Module Engine Room)
through 15A fuse [No. 78 located in the IPDM E/R (Intelligent Power Distribution Module Engine Room)]
to CPU (central processing unit) in the IPDM E/R (Intelligent Power Distribution Module Engine Room).

Power is also supplied at all times

through 50A fusible link (letter F, located in the fuse and fusible link box)
to BCM (Body Control Module) terminal 55
through 10A fuse [No. 18, located in the fuse block (J/B)]
to BCM (Body Control Module) terminal 42.

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

through 10A fuse [No. 1, located in the fuse block (J/B)]
to BCM (Body Control Module) terminal 38
through ignition relay, located in the IPDM E/R (Intelligent Power Distribution Module Engine Room)
to CPU (Central Processing Unit) in the IPDM E/R (Intelligent Power Distribution Module Engine Room).

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

through 10A fuse [No. 6, located in the fuse block (J/B)]
to BCM (Body Control Module) terminal 11.

Ground is supplied

to BCM (Body Control Module) terminal 52
through grounds M30 and M66
to IPDM E/R (Intelligent Power Distribution Module Engine Room) terminals 38 and 60
through grounds E17 and E43.