In which of the following conditions, the idle CO percentage should be measured with the vehicle?
A
Headlights and other electrical devices are switched off
B
Headlights and other electrical devices are switched on
C
Headlights and other lights are switched off
D
Headlights are switched on
Correct Answer: Headlights and other electrical devices are switched off
Headlights and other electrical devices are switched off where the idle CO percentage should be measured with the vehicle