Hazard Warning Lamps: Description and Operation
HAZARD LAMP OPERATIONWhen the hazard switch is depressed, BCM output turn signal from BCM terminals 45 and 46, interpreting it as turn signal is ON.
Connected from BCM terminal 45 and 46 to front combination lamp RH and LH terminals 4.
Turn signal lamp turns ON
- through front combination lamp RH and LH terminals 8
- to grounds E21, E50 and E51.
Connected form BCM terminals 45 and 46 to rear combination lamp control unit terminals 4 and 5.
Rear turn signal (LED) turns ON
- through rear combination lamp control unit terminal 11
- to rear combination lamp LH terminal 3,
- through rear combination lamp LH terminal 4
- to rear combination lamp control unit terminal 10,
- through rear combination lamp control unit terminal 9
- to rear combination lamp RH terminal 3,
- through rear combination lamp RH terminal 4
- to rear combination lamp control unit terminal 8.
And hazard switch is depressed, ground is supplied
- to hazard switch terminal 2
- through BCM terminal 29,
- to grounds M35, M45 and M85
- through hazard switch terminal 1.
BCM sends signal to the unified meter and A/C amp. through CAN communication, and turns ON turn signal indicator lamp with combination meter.
When rear turn signal lamp (LED) does not turn ON, rear combination lamp control unit sends signal to combination meter. And then unified meter and A/C amp. ends turn LED burnout status signal to BCM through CAN communication lines for speeding up turn signal blinking.