Tail Lamp: Description and Operation

System Description
Control of the parking, license plate, and tail lamp operation is dependent upon the position of the lighting switch (combination switch). When the lighting switch is placed in the 1ST position, the BCM (body control module) receives input signal requesting the parking, license plate, side marker and tail 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 (intelligent power distribution module engine room) controls the tail lamp relay coil. This relay, when energized, directs power to the parking, license plate, side marker and tail lamps, which then illuminate.

Power is supplied at all times
- to tail lamp relay, located in the IPDM E/R (intelligent power distribution module engine room)
- through 10 A fuse [No. 71, located in the IPDM E/R (intelligent power distribution module engine room)]
- to CPU (central processing unit) in the IPDM E/R (intelligent power distribution module engine room)
- through 15 A fuse [No. 78, located in the IPDM E/R (intelligent power distribution module engine room)]

Power is also supplied at all times
- to BCM (body control module) terminal 7
- through 40 A fusible link (letter F, located in the fuse and fusible link box).

With the ignition switch in the ON or START position, power is supplied
- to BCM (body control module) terminal 35
- through 10 A fuse [No. 1, located in the fuse block (J/B)]
- to CPU (central processing unit) in the IPDM E/R (intelligent power distribution module engine room).

With the ignition switch in the ACC or ON position, power is supplied
- to BCM (body control module) terminal 36
- through 10 A fuse [No. 6, located in the fuse block (J/B)].

Ground is supplied
- to BCM (body control module) terminal 8
- through grounds E17, E43 and F152
- to IPDM E/R (intelligent power distribution module engine room) terminal 38 and 60
- through grounds E17, E43 and F152.

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 parking, license plate, side marker and tail lamps to illuminate. This input is communicated to the IPDM E/R (intelligent power distribution module engine room) across the CAN communication lines. The CPU (central processing unit) in the IPDM E/R (intelligent power distribution module engine room) controls the tail lamp relay coil, which when energized, directs power
- through terminal 22 of the IPDM E/R
- to front combination lamp LH terminal 5and 6 (With xenon bulb headlamp),
- to front combination lamp LH terminal 5 (With halogen bulb headlamp),
- to front combination lamp RH terminal 5 and 6 (With xenon bulb headlamp),
- to front combination lamp RH terminal 5 (With halogen bulb headlamp),
- to rear combination lamp LH terminal 2 and 5,
- to rear combination lamp RH terminal 2 and 5,
- to license plate lamp LH terminal 2,
- to license plate lamp RH terminal 2,

Ground is supplied at all times
- to front combination lamp LH terminal 1 (With xenon bulb headlamp),
- to front combination lamp LH terminal 4 (With halogen bulb headlamp),
- through grounds E17, E43 and F152, and
- to front combination lamp RH terminal 1 (With xenon bulb headlamp),
- to front combination lamp RH terminal 4 (With halogen bulb headlamp),
- through grounds E17, E43 and F152, and
- to rear combination lamp LH terminal 3 and 4
- through grounds D105, B5, B6 and T14 (Coupe models), and
- through grounds B5, B6 and T14 (Roadster models), and
- to rear combination lamp RH terminal 3 and 4
- through grounds D105, B5, B6 and T14 (Coupe models), and
- through grounds B5, B6 and T14 (Roadster models), and
- to license plate lamp LH terminal 1,
- through grounds D105, B5, B6 and T14 (Coupe models),
- through grounds B5, B6 and T14(Roadster models),
- to license plate lamp RH terminal 1,
- through grounds D105, B5, B6 and T14 (Coupe models),
- through grounds B5, B6 and T14 (Roadster models)

With power and ground supplied, the parking, license plate side marker and tail lamps illuminate.

COMBINATION SWITCH READING FUNCTION
Refer to "Combination Switch Reading Function". Testing and Inspection

EXTERIOR LAMP BATTERY SAVER CONTROL
When the combination switch (lighting switch) is in the 1ST (or 2ND) position, and the ignition switch is turned from ON or ACC to OFF, the battery saver control function is activated. Under this condition, the parking, license plate, side marker and tail lamps remain illuminated for 5 minutes, then the parking, license plate, side marker and tail lamps are turned off.

Exterior lamp battery saver control mode can be changed by the function setting of CONSULT-II.