System Description
FRONT FOG LAMP
System Description
The 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 or AUTO position (headlamp is ON) for front fog lamp operation.
When the lighting switch is placed in fog lamp position, the BCM (body control module) receives input signal requesting the fog lamps to illuminate. When the headlamps are illuminated, 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) located in 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 15A fuse (No. 88, located in IPDM E/R)
- to front fog lamp relay, located in IPDM E/R, � through 15A fuse (No. 78, located in IPDM E/R)
- to CPU, located in IPDM E/R, � through 15A fuse (No. 71, located in IPDM E/R)
- to CPU, located in IPDM E/R, � through 50A fusible link (letter F, located in fuse fusible link and relay block)
- to BCM terminal 55, � through 10A fuse [No. 21, located in fuse block (J/B)]
- to BCM terminal 42, and
- to combination meter terminal 23, � through 10A fuse [No. 19, located in fuse block (J/B)]
- to unified meter and A/C amp. terminal 54, � through 10A fuse [No. 22, located in fuse block (J/B)]
- to key slot terminal 1.
With the ignition switch in the ON or START position, power is supplied
- to CPU, located in IPDM E/R, � through 15A fuse [No. 1, located in fuse block (J/B)]
- to BCM terminal 38, � through 10A fuse [No. 14, located in fuse block (J/B)]
- to combination meter terminal 12, � through 10A fuse [No. 12, located in fuse block (J/B)]
- to unified meter and A/C amp. terminal 53.
With the ignition switch in the ACC or ON position, power is supplied
- through 10A fuse [No. 6, located in fuse block (J/B)]
- to BCM terminal 11.
Ground is supplied
- to BCM terminal 52
- to combination meter terminals 9, 10 and 11
- to unified meter and A/C amp. terminals 55 and 71
- to push-button ignition switch (push switch) terminal 1
- to key slot terminal 8
- through grounds M16 and M70, � to IPDM E/R terminals 38 and 51
- through grounds E22 and E43.
FOG LAMP OPERATION
The fog lamp switch is built in combination switch. The lighting switch must be in 2ND position or AUTO position (headlamp is ON) and fog lamp switch must be ON for fog lamp operation.
With the fog lamp switch in the ON position, the CPU located in IPDM E/R grounds coil side of the fog lamp relay. Fog lamp relay then directs power
- through IPDM E/R terminal 37
- to front fog lamp RH terminal 1, � through IPDM E/R terminal 36
- to front fog lamp LH terminal 1.
Ground is supplied
- to front fog lamp RH terminal 2
- through grounds E22 and E43, � to front fog lamp LH terminal 2
- through grounds E22 and E43.
With power and grounds supplied, the front fog lamps illuminate.
The unified meter and A/C amp. that received the front fog lamp request signal by BCM across the CAN communication makes a front fog lamp indicator lamp turn on in combination meter.
COMBINATION SWITCH READING FUNCTION
Refer to System Description.
EXTERIOR LAMP BATTERY SAVER CONTROL
When the combination switch (lighting switch) is in the 2ND position (ON), and the ignition switch is turned from ON or ACC to OFF, the battery saver control function is activated.
Under this condition, the headlamps remain illuminated for 5 minutes, then the headlamps are turned off.
Exterior lamp battery saver control mode can be changed by the function setting of CONSULT-III.