Kia Optima: Inspection
In the state of IGN1 ON, when multi function switch module detects auto light switch on, tail lamp relay output and head lamp low relay output are controlled according to auto light sensor's input.
The auto light control doesn't work if the pin sunlight supply (5V regulated power from Ignition 1 power to sunlight sensor) is in short circuit with the ground.
If IGN1 ON, The BCM monitors the range of this supply and raises up a failure as soon as the supply’s voltage is out of range. Then this failure occurs and as long as this is present, the head lamp must be turned on without taking care about the sunlight level provided by the sensor.This is designed to prevent any head lamp cut off when the failure occurs during the night.
Removal
1.
Disconnect the negative (-) battery
terminal.
2.
Remove the auto light sensor
(A) from crash pad upper side by using screw (-) driver.
...
See also:
Troubleshooting
Troubleshooting
Symptom
Possible cause
Remedy
Tachometer does not operate
Cluster fuse (10A) blown
Check for short and replac ...
Driver's and passenger's front air bag
Driver’s front air bag
Passenger’s front air bag
Your vehicle is equipped with an Advanced Supplemental Restraint (Air Bag) System
and lap/shoulder belts at both the driver and passenger seati ...
Tachometer
Type A
Type B
The tachometer indicates the approximate number of engine revolutions per minute
(rpm).
Use the tachometer to select the correct shift points and to prevent lugging
and/or ove ...