Operation CHARM: Car repair manuals for everyone.
Home >> Infiniti Truck >> 2008 >> FX45 AWD V8-4.5L (VK45DE) >> Repair and Diagnosis >> Lighting and Horns >> Tail Lamp >> Description and Operation

Tail Lamp: Description and Operation

PARKING, LICENSE PLATE AND TAIL LAMPS SCHEMATIC






PARKING, LICENSE PLATE AND TAIL LAMPS

System Description
Control of the parking, license plate, side marker 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) through the CAN communication lines. CPU (central processing unit) located in the IPDM E/R 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.
The current that flows by Rear combination lamp control unit is controlled, and a tail lamp (LED) is made to turn ON.

OUT LINE
Power is supplied at all times
- to ignition relay, located in IPDM E/R, from battery direct,
- 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 50 A fusible link (letter M, located in fuse, fusible link and relay box)
- to BCM terminal 55,
- through 15 A fuse [No. 22, located in fuse block (J/B)]
- to BCM terminal 42,
- through 10 A fuse [No. 20, located in fuse block (J/B)]
- to rear combination lamp control unit terminal 1,
- through 10 A fuse [No. 19, located in fuse block (J/B)]
- to combination meter terminal 8 and
- to unified meter and A/C amp. terminal 21.

With the ignition switch in ON or START position, power is supplied
- through ignition relay, located in IPDM E/R, from battery direct,
- through 15 A fuse [No. 1, located in fuse block (J/B)]
- to BCM terminal 38,
- through 10 A fuse [No. 14, located in fuse block (J/B)]
- to combination meter terminal 7 and
- through 10 A fuse [No. 12, located in fuse block (J/B)]
- to unified meter and A/C amp. terminal 22.

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 rear combination lamp control unit terminal 7 and
- to IPDM E/R terminals 38 and 60
- through grounds E21, E50 and E51,
- to BCM terminals 49 and 52
- to combination meter terminals 5, 6 and 15, and
- to unified meter and A/C amp. terminals 29 and 30
- through grounds M35, M45 and M85.

OPERATION BY LIGHTING SWITCH
With the lighting switch in the 1ST or 2ND position (or if the auto light system is activated), the BCM 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 through the CAN communication. The CPU located in the IPDM E/R controls the tail lamp relay coil, which when energized, directs power.
- through IPDM E/R terminal 22
- to front side marker lamp LH terminal 1
- to parking lamp LH terminal 2
- to license plate lamp LH terminal 1
- to rear combination lamp LH terminal 1
- to rear combination lamp control unit terminal 2
- to front side marker lamp RH terminal 1
- to parking lamp RH terminal 2
- to license plate lamp RH terminal 1 and
- to rear combination lamp RH terminal 1.

Ground is supplied at all times
- to front side marker lamp LH terminal 2
- through grounds E21, E50 and E51,
- to parking lamp LH terminal 3
- through grounds E21, E50 and E51,
- to license plate lamp LH terminal 2
- through grounds B15 and B45,
- to rear combination lamp LH terminal 2
- through grounds B15 and B45,
- to front side marker lamp RH terminal 2
- through grounds E21, E50 and E51,
- to parking lamp RH terminal 3
- through grounds E21, E50 and E51,
- to license plate lamp RH terminal 2
- through grounds B15 and B45,
- to rear combination lamp RH terminal 2
- through grounds B203 and B210,
- to rear combination lamp control unit terminal 7
- through grounds E21, E50 and E51.

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

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 feature is activated.

Under this condition, the parking, license, 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-III.

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-43, "CAN System Specification Chart". CAN System Specification Chart
pro multis · About Operation CHARM