Location Of Data Link Connector (Dlc); Obd-2 System Readiness Monitors - Unitec OBD II Mode D'emploi

20996_Bed.:Layout 1
Operating instructions
GB
SYSTEM
B = Body
C = Chassis
P = Powertrain
U = Network
CODE TYP
0 = General
1 = Manufacturer-
specific

2.3 Location of data link connector (DLC)

The DLC (Data Link Connector or Diagnostic Link Connector) is the standardised 16-pin connector where the
interface between the diagnostic scanning tools and the vehicle's on-board computer is found. The DLC can
normally be found approx. 30.5 cm from the centre of the display and instrument panel (dashboard), in most
vehicles underneath or next to the driver's side. In some Asian and European vehicle models the DLC is to
be found behind the ashtray. To access the connector the ashtray must be removed. If you cannot find the
DLC refer to your vehicle's service handbook or contact your specialist garage.
2.4 OBD II readiness monitors
An important part of your vehicle's OBD II system are the readiness monitors that display whether the
emission components of the OBD II system have been evaluated. Periodic tests on specific systems and
components are carried out with them to ensure that they work within the accepted threshold values.
Currently there are eleven OBD II readiness monitors (or I/M monitors) defined by the US Environmental
Protection Agency (EPA). Not every monitor is supported by every vehicle and the exact number of monitors
in each vehicle depends on the emission control strategy of the individual vehicle manufacturers..
Continuous monitors -- Some vehicle components or systems are continuously tested by the vehicle's OBD
II system whereas others are only tested under certain vehicle operating conditions. The continuously
monitored components listed below are always in readiness mode:
1. Misfire
2. Fuel system
3. Comprehensive component monitor (CCM)
14.04.2010 15:33 Uhr
DTC EXAMPLE:
P
0 2 0 2
SUB-SYSTEME
1 = Fuel/air/lambda sensors
2 = Injector circuit (fuel or air)
3 = Ignition or misfire
4 = Emission and exhaust control
5 = Speed and braking control
system
6 = Engine management and
on-board computer
7 = Transmission/hydraulic
sensors
8 = Transmission/hydraulic
pressure
9 = Automatic transmission
Seite 17
17
Displays which
component is
defective (displays
the trouble code)