Obd Ii Readiness Monitors - Performance Tool W2976 El Manual Del Propietario

Systems
B = Body
C = Chassis
P = Powertrain
U = Network
Code Type
0 = Generic
1 = Manufacturer
Specific

OBD II 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 OBD II system. They are running
periodic tests on specific systems and components to ensure that they are
performing within allowable limits.
Currently, there are eleven OBD II Readiness Monitors (or I/M Monitors)
defined by the U.S. Environmental Protection Agency (EPA). Not all
monitors are supported by all 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)
DTC EXAMPLE
P0202
Sub-Systems
1 = Fuel & Air Metering
2 = Fuel & Air Metering
3 = Ignition System or
Engine Misfire
4 = Auxiliary Emissions Controls
5 = Vehicle Speed Control
& Idle Controls
6 = Computer Output Circuits
7 = Transmission Controls
8 = Transmission Controls
Identifying
specific
malfunctioning
section of the
systems
5