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DTC Example
P 0 5 2 0
Systems
B = Bod y C = C has sis
P = Powertrain U = Netw ork
Code Type
Generic (SAE) :
P0
B0
C0
U0
P1, P2
Manufacturer
Specific:
B1, B2 C1, C2
U1, U2
Last two digits identify individual
component within the system
Sub -systems
1 = Fuel and air metering
2 = Ignition system or engine misfire
3 = Auxiliary emissions controls
4 = Vehicle speed control and idle controls
5 = Computer output circuits
6 = Transmission controls
Figure 1-2: Explanation of a diagnostic trouble code.
2.3 Location of the Data Link Connector (DLC)
The DLC (Data Link Connector or Diagnostic Link Connector) is the
standardized 16-cavity connector where diagnostic scan tools interface with the
vehicle's on-board computer. The DLC is usually located 12 inches from the
center of the instrument panel (dash), under or around the driver's side for most
vehicles. If the Data Link Connector is not located under the dashboard, a label
should be there revealing its location. For some Asian and European vehicles,
the DLC is located behind the ashtray and the ashtray must be removed to
access the connector. If the DLC cannot be found, refer to the vehicle's service
manual for the location.
Figure 1-3: The DLC connector (left) can be found in the
area of the car interior seen at right (black arrow).
4
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