Frontier 4WD V6-3.3L (VG33E) (2003)
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Detectable Lines and Non-detectable Lines
In some wiring diagrams, two kinds of lines, representing wires, with different weight are used.
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A line with regular weight (wider line) represents a "detectable line for DTC (Diagnostic Trouble Code)". A "detectable line for DTC" is a circuit
in which ECM can detect its malfunctions with the on board diagnostic system.
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A line with less weight (thinner line) represents a "non-detectable line for DTC". A "non-detectable line for DTC" is a circuit in which ECM
cannot detect its malfunctions with the on board diagnostic system.
Multiple Switch
