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 CPU (central processing unit) of the IPDM E/R controls the tail lamp relay coil. This relay, when energized, directs power to the parking, license plate, rear side marker and tail lamps, which then illuminate.

Power is supplied at all times
- through 15 A fuse (No. 41, located in the IPDM E/R)
- to tail lamp relay, located in the IPDM E/R, and
- through 15 A fuse (No. 34 located in the IPDM E/R)
- to the CPU in the IPDM E/R, and
- to ignition relay, located in the IPDM E/R, and
- through 50 A fusible link (letter f, located in the fuse and fusible link box)
- to BCM terminal 55, and
- through 10 A fuse [No. 21, located in the fuse block (J/B)]
- to BCM terminal 42.

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

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

Ground is supplied
- to BCM terminal 52
- through grounds M57, M61 and M79, and
- to IPDM E/R terminals 38 and 60
- through grounds E15 and E24.

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 across the CAN communication lines. The CPU in the IPDM E/R controls the tail lamp relay coil, which when energized, directs power
- through IPDM E/R terminal 22
- to front combination lamp LH and RH terminal 6
- to license plate lamp LH and RH terminal +
- to rear combination lamp LH and RH terminal 2.

Ground is supplied
- to front combination lamp LH and RH terminal 10
- through grounds E15 and E24, and
- to license plate lamp LH and RH terminal -
- to rear combination lamp LH and RH terminal 5
- through grounds B7 and B19

With power and ground supplied, the parking, license plate, rear 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 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-II.