High Beam Operation/Flash-to-Pass Operation

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

With the lighting switch in 2ND position and placed in HIGH or PASS position, the BCM (body control module) receives input requesting the headlamp high beams to illuminate. This input 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 headlamp high relay coil. When energized, this relay directs power

To 10A fuse [No. 40, located in the IPDM E/R]
Through terminal 27 of the IPDM E/R
To terminal 1 of the daytime light relay
Through daytime light relay terminal 2
To body grounds E9, E15 and E24.

When energized, this relay directs power

Through daytime light relay terminal 3
To daytime light control unit terminal 8 and
To terminal 1 of headlamp RH (high).

Also when the headlamp high relay is energized, it directs power

To 10A fuse [No. 38, located in the IPDM E/R]
Through terminal 28 of the IPDM E/R
To terminal 5 of the daytime light control unit
Through terminal 6 of the daytime light control unit
To terminal 1 of headlamp LH (high).

Ground is supplied

To terminal 2 of headlamp RH (high)
Through body grounds E15 and E24, and
To terminal 2 of headlamp LH (high)
To terminal 7 of the daytime light control unit
Through terminal 9 of the daytime light control unit
Through body grounds E9, E15 and E24.

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