Data Link Connector (Dlc) Location; Obdii Readiness Monitors; Obdii Monitor Readiness Status - MUCAR CS4 Manual Del Usuario

2.3 Data Link Connector (DLC) Location

The DLC (Data Link Connector or Diagnostic Link Connector) is typically a 16pin connector
where diagnostic code readers interface with the vehicle's onboard 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 Data Link Connector is not located under dashboard,
a label should be there telling 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.

2.4 OBDII Readiness Monitors

An important part of a vehicle's OBDII system is the Readiness Monitors, which are
indicators used to find out if all of the emissions components have been evaluated by the
OBDII system. They are running periodic tests on specific systems and components to
ensure that they are performing within allowable limits.
Currently, there are eleven OBDII I Readiness Monitors (or I/M Monitors) defined by the
U.S. Environmental Protection Agency (EPA). Not all monitors are supported in every
vehicles and the exact number of monitors in any vehicle depends on the motor vehicle
manufacturer's emissions control strategy.
Continuous Monitors -- Some of the vehicle components or systems are continuously
tested by the vehicle's OBDII system, while others are tested only under specific vehicle
operating conditions. The continuously monitored components listed below are always
ready:
1. Misfire
2. Fuel System
3. Comprehensive Components (CCM)
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Once the vehicle is running, the OBDII system is continuously checking the above
components, monitoring key engine sensors, watching for engine misfire, and monitoring
fuel demands.
Non-Continuous Monitors -- - Unlike the continuous monitors, many emissions and engine
system components require the vehicle to be operated under specific conditions before the
monitor is ready. These monitors are termed noncontinuous monitors and are listed below:
1) EGR System
2) O2 Sensors
3) Catalyst
4) Evaporative System
5) O2 Sensor Heater
6) Secondary air Injection
7) Heated Catalyst
8) A/C system

2.5 OBDII Monitor Readiness Status

OBDII systems must indicate whether or not the vehicle's PCM's monitor system has
completed testing on each component. Components that have been tested will be reported
as "Ready", or "Complete", meaning they have been tested by the OBDII system.
The purpose of recording readiness status is to allow inspectors to determine if the
vehicle's OBDII system has tested all the components and/or systems. The Powertrain
Control Module (PCM) sets a monitor to "Ready" or "Complete" after an appropriate drive
cycle has been performed. The drive cycle that enables a monitor and sets readiness
codes to "Ready" varies for each individual monitor. Once a monitor is set as "Ready"
or "Complete", it will remain in this state. A number of factors, including erasing of
Diagnostic Trouble Codes (DTCs) with a code reader or a disconnected battery, can result
in Readiness Monitors being set to "Not Ready". Since the three continuous monitors
are constantly evaluating, they will be reported as "Ready" all of the time. If testing of a
particular supported non-continuous monitor has not been completed, the monitor status
will be reported as "Not Complete" or "Not Ready."
In order for the OBD monitor system to become ready, the vehicle should be driven under
a variety of normal operating conditions. These operating conditions may include a mix of
highway driving and stop and go, city type driving, and at least one overnight-off period.
For specific information on getting your vehicle's OBD monitor system ready, please
consult your vehicle owner's manual.
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