Tail Lamp: Description and Operation

PARKING, LICENSE PLATE AND TAIL LAMPS

System Description
Control of parking, license plate, and tail lamp operation is dependent upon the position of 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 CPU (central processing unit) located in the IPDM E/R controls the tail lamp relay coil. This relay, when energized, directs power to parking, license plate, side marker and tail lamps, which then illuminate.

OUTLINE

Power is supplied at all times
- through 10 A fuse (No.71, located in IPDM E/R)
- to tail lamp relay, located in IPDM E/R, and
- to CPU located in IPDM E/R,
- through 15 A fuse (No.78, located in IPDM E/R)
- to CPU located in IPDM E/R,
- through 40 A fusible link (letter F, located in fuse, fusible link and relay box)
- to BCM terminal 55,
- through 10 A fuse [No.18, located in fuse block (J/B)]
- to BCM terminal 42.

With ignition switch in ON or START position, power is supplied
- to CPU located in IPDM E/R, from battery direct
- through 10 A fuse [No.1, located in fuse block (J/B)]
- to BCM terminal 38.

With ignition switch in ACC or ON position, power is supplied
- through 10 A fuse [No. 6, located in fuse block (J/B)]
- to BCM terminal 11.

Ground is supplied
- to BCM terminal 52
- through grounds M30 and M66,
- to IPDM E/R terminals 38 and 60
- through grounds E17, E43 and F152.

OPERATION BY LIGHTING SWITCH
With the lighting switch in the 1ST or 2ND position, the BCM receives input signal requesting the parking, license plate, side marker and tail lamps to illuminate. This input is communicated to the IPDM E/R across the CAN communication lines. The CPU located in the IPDM E/R controls tail lamp relay coil, which when energized, directs power
- through IPDM E/R terminal 22
- to front combination lamp LH terminals 5 and 6 (With xenon bulb headlamp)
- to front combination lamp LH terminal 5 (With halogen bulb headlamp)
- to front combination lamp RH terminals 5 and 6 (With xenon bulb headlamp)
- to front combination lamp RH terminal 5 (With halogen bulb headlamp)
- to rear combination lamp LH terminals 2 and 5
- to rear combination lamp RH terminals 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,
- 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,
- to rear combination lamp LH terminals 3 and 4
- through grounds D105, B5, B6 and T14 (Coupe models)
- through grounds B5, B6 and T14 (Roadster models),
- to rear combination lamp RH terminals 3 and 4
- through grounds D105, B5, B6 and T14 (Coupe models)
- through grounds B5, B6 and T14 (Roadster models),
- 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, parking, license plate side marker and tail lamps illuminate.

COMBINATION SWITCH READING FUNCTION
Refer to "COMBINATION SWITCH READING FUNCTION".

EXTERIOR LAMP BATTERY SAVER CONTROL
When the combination switch (lighting switch) is in the 2ND position (ON), 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, side marker and tail lamps remain illuminated for 5 minutes, then the headlamps are turned off.

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

CAN Communication System Description
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Unit
Refer to "Information Bus".