Tail Lamp: Description and Operation

PARKING, LICENSE PLATE AND TAIL LAMPS

System Description
The control of the parking, license plate, side marker and tail lamp operation is dependent upon the position of lighting switch. When the lighting switch is placed in the 1ST position, 2ND position or AUTO position (headlamp is ON), 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) through the CAN communication lines. The CPU (central processing unit) located in the IPDM E/R controls the tail lamp relay. This relay, when energized, directs power to parking, license plate, side marker and tail lamps, which then illuminate.

Power is supplied at all times
- through 10 A fuse (No. 71, located in IPDM E/R)
- to CPU located in IPDM E/R, and
- to tail lamp relay, located in IPDM E/R,
- through 15 A fuse (No. 78, located in IPDM E/R)
- to CPU located in IPDM E/R,
- through 50 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 the ignition switch in the 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 the ignition switch in the 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 and E43.

OPERATION BY LIGHTING SWITCH
With the lighting switch in the 1ST position, 2ND position or AUTO position (headlamp is ON), the BCM receives input signal requesting parking, license plate, side marker and tail lamps to illuminate. This input signal is communicated to the IPDM E/R through CAN communication lines. The CPU located in the IPDM E/R controls tail lamp relay, which when energized, directs power
- through IPDM E/R terminal 22
- to front side marker lamp RH and LH terminals 1
- to front combination lamp RH and LH terminals 7
- to rear combination lamp RH and LH terminals 3, and
- to license plate lamp RH and LH terminals 1.

Ground is supplied
- to front side marker lamp RH and LH terminals 2, and
- to front combination lamp RH and LH terminals 8
- through grounds E17 and E43,
- to rear combination lamp RH and LH terminals 4
- through ground B103,
- to license plate lamp RH and LH terminals 2
- through grounds B5 and B29.
With power and ground supplied, parking, license plate, side marker and tail lamps illuminate.

COMBINATION SWITCH READING FUNCTION
Refer to BCS-3, "COMBINATION SWITCH READING FUNCTION". Description and Operation

EXTERIOR LAMP BATTERY SAVER CONTROL
When the lighting switch is in the 1ST or 2ND position and ignition switch is turned from ON or ACC to OFF, battery saver control feature is activated. Under this condition, 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.

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 LAN-26, "CAN Communication Unit". Description and Operation