DTC Example
P 0 2 0 2
Systems
B=Body
C=Chassis
P=Powertrain
U=Network
Identifying specific
malfunctioning
section of the
systems
Code Type
Generic (SAE):
P0,P2,P34--P39
B0,B3
C0,C3
U0,U3
Manufacturer specific:
P1,P30--P33
B1,B2
C1,C2
U1,U2
Sub-systems
1=Fuel and Air Metering
2=Fuel and Air Metering
3=Ignition System or Engine Misfire
4=Auxiliary Emission Controls
5=Vehicle Speed Control and Idle
Controls
6=Computer Output Circuits
7=Transmission Controls
8=Transmission Controls
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 sacn 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 indicating an alternate location. For
some Asian and European vehicles, the DLC
is located behind the ashtray, which must be removed to access the
connector. If the DLC cannot be found,refer to the vehicle's service
manual for the location.
2. 4 OBD II Readiness Monitors
An important part of a vehicle's OBD II system the Readiness Monitors.
These are indicators used to find out if all of the emissions components
have been evaluated by the OBD II system.They run periodic tests on
specific systems and components to ensure that they are performing
within allowable limits.
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