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ELECTRICAL
140
SIGNAL
LEVEL
TYPE
Master light switch failsafe
High
Input
Position light switch
High
Input
Dip beam switch
Low
Input
Head lamp on switch
High
Input
Front fog lamp switch
High
Input
Rear fog lamp switch
High
Input
High beam switch
Low
Input
Position light relay
High
Output
Dip beam lighting relay
High
Output
Head beam relay
High
Output
Front fog lamp relay
High
Output
Rear fog lamp relay
High
Output
BCM Microprocessor Failure
If there is a microprocessor failure of
BCM, the vehicle Dip Beam, Position lights, and
rear fog lights will illuminate when selected using
the Master Light switch. BCM will work in LIMP
HOME Mode.
NOTE:
All above functions can be activated without
ignition ON during microcontroller failure
condition.
Master light switch fail safe:
The BCM must be able to detect failure of
the master light switch. During MLS failsafe BCM
will turn on parking lights and Dip beam lights.
This functionality can only be active when the
Vehicle Power State is Ignition ON.
Front fog lamp Operation
:
Front fog lamp relay will come ON if:
1. Ignition switch is ON.
2. Parking light switch or head lamp switch is
ON.
3. Front fog lamp switch is ON.
Front fog lamp relay will go off if:
1. Ignition switch is off.
2. Parking light switch and head lamp switch
both are off.
3. Front fog switch is off.
Rear fog lamp operation:
Rear fog lamp relay will come ON if:
1. Ignition switch is ON.
2. Parking light switch or head lamp switch is
ON.
3. Front fog lamp switch is ON.
4. Rear fog lamp switch is ON.
Rear fog lamp relay will go off if:
1. Ignition switch is off.
2. Parking light switch and head lamp switch
both are off.
3. Front fog lamp switch goes off.
4. Rear fog lamp switch is off.