Hazard Warning Lamps: Description and Operation

HAZARD WARNING LAMP OPERATION
Power is supplied at all times
- through 40 A fusible link (letter F, located in fuse, fusible link and relay box)
- to BCM terminal 55,
- through 10 A fuse [No. 19, located in fuse block (J/B)]
- to combination meter terminal 24, and
- to unified meter and A/C amp. terminal 21.

Ground is supplied
- to BCM terminals 52
- through grounds M30 and M60,
- to unified meter and A/C amp. terminals 29 and 30
- through grounds M30 and M66,
- to combination meter terminals 10, 11 and 12
- through grounds M30 and M66.

When the hazard switch is depressed, power is supplied
- through BCM terminal 29
- to hazard lamp switch terminal 2.

Ground is supplied
- through hazard lamp switch terminal 1
- to grounds M30 and M66.

The BCM then supplies power
- through BCM terminal 45
- to front combination lamp LH terminal 2(*1)
- to front combination lamp LH terminal 1(*2)
- to rear combination lamp LH terminal 2,
- through BCM terminal 46
- to front combination lamp RH terminal 2(*1)
- to front combination lamp RH terminal 1(*2)
- to rear combination lamp RH terminal 2.

Ground is supplied
- to front combination lamp LH terminal 1(*1)
- through grounds E17, E43 and F152
- to front combination lamp LH terminal 4(*2)
- through grounds E17, E43 and F152,
- to front combination lamp RH terminal 1(*1)
- through grounds E17, E43 and F152
- to front combination lamp RH terminal 4(*2)
- through grounds E17, E43 and F152,
- to rear combination lamp LH terminal 4
- through grounds T14, B5, B6 and D105,
- to rear combination lamp RH terminal 4
- through grounds T14, B5, B6 and D105.

The BCM also supplies input to unified meter and A/C amp. terminals 1 and 11 across the CAN communication lines. This input is processed by the unified meter control unit in the combination meter through the unified meter and A/C amp., which in turn supplies ground to the left and right turn signal indicator lamps.

With the power and ground supplied, BCM controls flashing of hazard warning lamps.

NOTE:
*1: Xenon headlamp, *2: Halogen headlamp.