Low Beam Operation

WARNING: This page is about a different car, the 2010 Nissan Sentra. 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 an input signal requesting the headlamps to illuminate. This input signal is communicated to the IPDM E/R via the CAN communication lines. The CPU located in the IPDM E/R controls the headlamp low relay coil, which when energized, directs power

through 15A fuse (No. 41, located in IPDM E/R)
through IPDM E/R terminal 54
to front combination lamp RH terminal 3,
through 15A fuse (No. 40, located in IPDM E/R)
through IPDM E/R terminal 52
to daytime light relay 2 terminals 1 and 3 (energizing the relay) and
through daytime light relay 2 terminal 5
to front combination lamp LH terminal 3.

Ground is supplied

to front combination lamp RH terminal 5
through grounds E9, E15 and E24,
to headlamp LH terminal 5 via
daytime light relay 1 terminals 3 and 4
through grounds E9, E15 (all models) and E24 (with MR20DE).

With power and ground supplied, low beam headlamps illuminate.

High Beam/Flash-to-Pass Operation

With the lighting switch in 2ND position and high beam switch in the HIGH position, the BCM receives input signal requesting the headlamp high beams to illuminate. The flash-to-pass feature can be used any time and also sends a signal to the BCM. This input signal is communicated to the IPDM E/R and the combination meter via the CAN communication lines. The CPU located in the IPDM E/R controls the headlamp high relay coil, which when energized, directs power

through 10A fuse (No. 34, located in IPDM E/R)
through IPDM E/R terminal 56
to front combination lamp RH terminal 6, and
through 10A fuse (No. 35, located in IPDM E/R)
through IPDM E/R terminal 55
to front combination lamp LH terminal 6.

Ground is supplied

to front combination lamp RH terminal 5
through grounds E9, E15 (all models) and E24 (with MR20DE),
to front combination lamp LH terminal 5 via
daytime light relay 1 terminals 3 and 4
through grounds E9, E15 (all models) and E24 (with MR20DE).

With power and ground supplied, the high beam headlamps illuminate.

The BCM sends a signal to the combination meter requesting the high beam indicator lamp to turn ON.

Daytime Light System Operation

With the lighting switch in the OFF or 1ST position (parking lamps ON), the BCM receives inputs requesting the headlights off. If the parking brake is released and the engine is running, the BCM then sends a signal, via the CAN communication lines, requesting the IPDM E/R to activate the daytime light system. The CPU located in the IPDM E/R controls the daytime light relay 1 coil, which when energized, directs power

from daytime light relay 1 terminal 3
to front combination lamp LH terminal 5,
through front combination lamp LH high beam terminal 6
to IPDM E/R terminal 55,
through 10A fuse (No. 35, located in IPDM E/R) and
through both de-energized headlamp high relays
to 10A fuse (No. 34, located in IPDM E/R),
through IPDM E/R terminal 56
to front combination lamp RH high beam terminal 6.

Ground is supplied

to front combination lamp RH terminal 5 and
to daytime light relay 1 terminal 4
through grounds E9, E15 (all models) and E24 (with MR20DE),
to daytime light relay 1 terminal 1
through IPDM E/R terminal 49.

With power and ground supplied, high beam headlamps illuminate at reduced intensity.