System Description: Notes

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

The headlamp system for Canada vehicles is equipped with a daytime light control unit that activates the high beam headlamps at approximately half illumination whenever the engine is running and the lighting switch is in the OFF or 1st position. If the parking brake is applied before the engine is started the daytime lights will not be illuminated. The daytime lights will illuminate once the parking brake is released. Thereafter, the daytime lights will continue to operate when the parking brake is applied.

Power is supplied at all times

to ignition relay, located in the IPDM E/R (intelligent power distribution module engine room), and
to headlamp high relay, located in the IPDM E/R, and
to headlamp low relay, located in the IPDM E/R, and
through 50A fusible link (letter j , located in the fuse and fusible link box)
to BCM terminal 70, and
through 15A fuse [No. 3, located in the fuse block (J/B)]
to BCM terminal 57, and
through 15A fuse (No. 29, located in the fuse and fusible link box)
to daytime light control unit terminals 2 and 3, and
through 15A fuse (No. 34, located in the IPDM E/R)
to CPU in the IPDM E/R, and
through 15A fuse (No. 41, located in the IPDM E/R)
to CPU in the IPDM E/R.

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

through 10A fuse [No. 12, located in the fuse block (J/B)]
to daytime light control unit terminal 12, and
through 10A fuse [No. 16, located in the fuse block (J/B)]
to BCM terminal 38.

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

through 10A fuse [No. 4, located in the fuse block (J/B)]
to BCM terminal 11.

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

through 10A fuse [No. 9, located in the fuse block (J/B)]
to daytime light control unit terminal 1.

Ground is supplied

to IPDM E/R terminals 38 and 60, and
to daytime light control unit terminal 9
through grounds E9, E15 and E24, and
to BCM terminal 67
through grounds M57, M61 and M79.