Fog/Driving Lamp: Description and Operation

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 AUTO position (with auto light system) or headlamps position (LOW beam is ON) for front fog lamp operation. When the lighting switch is placed in the fog lamp position, the BCM (body control module) receives input requesting the fog lamps to illuminate. This input 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 front fog lamp relay coil. When energized, this relay directs power to the front fog lamps.

OUTLINE

Power is supplied at all times
- through 15 A fuse (No. 43, located in the IPDM E/R)
- to front fog lamp 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 70.

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

When the ignition switch is in 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 67
- through grounds F14, M57 and M61.

FOG LAMP OPERATION
The fog lamp switch is built into the combination switch. The lighting switch can only be in AUTO position (with auto light system) or headlamps 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 of the IPDM E/R grounds the coil side of the fog lamp relay. The fog lamp relay then directs power
- through IPDM E/R terminal 37
- to front fog lamp LH terminal 1, and
- through IPDM E/R terminal 36
- to front fog lamp RH terminal 1.

Ground is supplied
- to front fog lamp LH terminal 2
- through grounds E15 and E24, and
- to front fog lamp RH terminal 2
- through grounds E15 and E24.

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

BATTERY SAVER CONTROL
When the fog lamp switch is ON and the ignition switch is turned from ON to ACC or OFF, or if the ignition switch is in the OFF position when the fog lamp switch is turned ON, the battery saver control feature is activated.

Under this condition, the fog lamps (and headlamps) remain illuminated for 5 minutes, unless the combination switch (lighting switch) position is changed. If the combination switch (lighting switch) position is changed, then the fog lamps (and headlamps) are turned off.

CAN Communication System Description
Refer to "INFORMATION BUS".