Emissions - OBD II Readiness Test Drive Cycles: Overview

Group
36 - ENGINE ELECTRICAL

Number
02-36-030

Date
December, 2002

Model
SONATA 1996-1998

Subject
OBD-II READINESS TEST DRIVE CYCLE FOR 1996-1998 SONATA

DESCRIPTION:

This TSB describes Drive Cycles which may assist the vehicles OBD-II system to complete the necessary emissions systems tests and set the OBD-II Readiness Monitors to display READY (or COMPLETED -- described simply as READY in this TSB). This TSB specifically covers the 1996-1998 Sonata.

The drive cycles described below are specifically designed to set the following items:

^ CATALYST

^ EVAP. PURGE

^ 02 SENSOR

^ 02 SENSOR HEATER

^ EGR

READINESS MONITOR:

The readiness monitors indicate if all the necessary emissions systems tests have been completed by the ECM.

This feature is a part of the OBD-II system.

It ensures that vehicles have had sufficient time to conduct all necessary emissions related diagnostics:

^ after a repair which resulted in the power to the ECM being interrupted

^ or resulted in clearing of Diagnostic Trouble Codes (DTCs) using a scan tool.