System Description

Control of the fog lamps is dependent upon the position of the combination switch (lighting switch). The lighting switch must be in the 2ND position and LOW position, or AUTO position (LOW beam is ON) for front fog lamp operation.When the lighting switch is placed in the fog lamp position the BCM receives input requesting the fog lamps to illuminate. When the headlamps are illuminated, this input 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 controls the front fog lamp relay coil. When activated, this relay directs power to the front fog lamps.

OUTLINE

Power is supplied at all times
- through 15 A fuse [No.72, located in the IPDM E/R (intelligent power distribution module engine/room)]
- to front fog lamp relay, located in the IPDM E/R, and

Power is also supplied at all times
- to terminal 7 of the BCM (body control module).

When the ignition switch is in ON or START position, power is supplied
- to terminal 35 of the BCM.

When the ignition switch is in ACC or ON position, power is supplied
- to terminal 36 of the BCM.

Ground is supplied
- to BCM terminals 8
- through body grounds E17, and E43.

FOG LAMP OPERATION
The fog lamp switch is built into the combination switch. The lighting switch must be in the 2ND position and LOW position, or AUTO position (LOW beam is ON) and the fog lamp switch must be ON for fog lamp operation.

With the fog lamp switch in the ON position, the CPU (central processing unit) of the IPDM E/R (intelligent power distribution module engine room) grounds the coil side of the fog lamp relay. The fog lamp relay then directs power
- to front combination lamp LH terminal 1
- through IPDM E/R terminal 32, and
- to front combination lamp RH terminal 1
- through IPDM E/R terminal 29.

Ground is supplied
- to front combination lamp LH terminal 8
- through body grounds E17 and E43, and
- to front combination lamp RH terminal 8
- through body grounds E17 and E43.

With power and grounds supplied, the front fog lamps illuminate.

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

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

Under this condition, the fog lamps (and headlamps) remain illuminated for 5 minutes, then the fog lamps (and headlamps) are turned off.

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