DTC Example
p 0520
Systems
B Body
C = Chassis
p = powertrain
IJ = Network
Code Type
Generic (SAE):
BO
Manufacturer Specific:
Ul. CJ2
Last tv.o digits identify individual
component within the system
Su b •systems
I = 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 COK 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
BEHIND
LEFT CORNER
OF DASH
CENTER
OF DASH
Figure 1-3: The DLC connector (left) can be found in the area of the
EN
car interior seen at right (black arrow).
3
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