Low Beam Operation

WARNING: This page is about a different car, the 2007 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

With the lighting switch in 2ND position, the BCM receives input requesting the headlamps to illuminate. This input is communicated to the IPDM E/R across the CAN communication lines. The CPU of the IPDM E/R controls the headlamp low relay coil. When energized, this relay directs power

through 15A fuse (No. 41, located in the IPDM E/R)
through IPDM E/R terminal 54
to front headlamp RH terminal 3, and
through 15A fuse (No. 40, located in the IPDM E/R)
through IPDM E/R terminal 52
to daytime light relay 2 terminals 2 and 5, and
through daytime light relay 2 terminal 3
to front headlamp LH terminal 3.

Ground is supplied

to front headlamp RH terminal 2
to daytime light relay 1 terminal 4
to daytime light relay 2 terminal 1
through grounds E9, E15 and E24.

When the CPU of the IPDM E/R energizes the headlamp low relay, it de-energizes daytime relay 1. When deenergized, this relay supplies ground

to front headlamp LH terminal 2
through daytime light relay 1 terminal 3.

With power and ground supplied, low beam headlamps illuminate.