Detectable Lines And Non-Detectable Lines
WARNING: This page is about a different car, the 2003 Infiniti QX4. However, it is still accessible from the selected car via links, so may be relevant.
In some Circuit Diagrams, two kinds of lines, representing wires, with different weight are used.
- 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 (Engine Control Module) can detect its malfunctions with the on board diagnostic system.
- 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.