Illumination Operation By Lighting Switch

With the lighting switch in the 1ST or 2ND position (or if the auto light system is activated), the BCM (body control module) receives input signal requesting the illumination 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, which, when energized, directs power.

through IPDM E/R terminal 22
to glove box lamp terminal 1
to A/T device (illumination) terminal 1
to illumination control switch (illumination) terminal 1
to VDC off switch (illumination) terminal 3 (with VDC)
to clock (illumination) terminal 4
to hazard switch (illumination) terminal 7
to heated seat switch (driver side) (illumination) terminal 5 (with heater seat)
to heated seat switch (passenger side) (illumination) terminal 5 (with heater seat)
to A/C and audio controller (illumination) terminal 9
to audio unit terminal 8
to display and A/C auto amp. terminal 28
to cigarette lighter socket terminal 3
to ashtray (illumination) terminal 1
to NAVI control unit (illumination) terminal 9 (with NAVI) and
to NAVI switch RH (illumination) terminal 2 (with NAVI).

Ground is supplied at all times

to ashtray (illumination) terminal 2 and
to illumination control switch terminal 3
through grounds M30 and M66.

With power and ground supplied, illumination lamps illuminate.