Hummer H2. Manual — part 47

3. This step is to run the EVAP, AIR and the Oxygen Sensor Tests. The EVAP Test begins once the engine

coolant reaches a calibrated temperature. The AIR Test, if equipped, begins shortly after Closed Loop and
the indicated speed is achieved. The Oxygen Sensor Tests begin once the engine is at operating
temperature, in Closed Loop fuel control, and a calibrated amount of time has elapsed.

4. This step is to run the Exhaust Gas Recirculation (EGR) Tests. The EGR Tests are run during a gradual

deceleration with a closed throttle. The vehicle speed is required in order to maintain a high, steady
Manifold Absolute Pressure (MAP) signal.

5. This step is to run the Catalyst Tests. This test runs during the idle period immediately following a cruise

period that meets a minimum calibrated RPM and time period.

6. Perform the individual system test for any of the systems that do not update to YES.

7. The I/M System Status only reports on whether or not a diagnostic has run, not what the outcome of the

test was. If any emission related DTC sets after the tests are complete, the DTC will require diagnosis.
See appropriate SELF DIAGNOSTICS article.

1998 Chevrolet Pickup C1500

DRIVE CYCLES OBD-II Vehicles - OBD-II Readiness Monitors

Fig. 4: Inspection/Maintenance Complete System Set Procedure - 1 Of 2 (2001-2003 GM Vehicles -
Except Metro, Prizm, Saturn & Tracker)
Courtesy of GENERAL MOTORS CORP.

1998 Chevrolet Pickup C1500

DRIVE CYCLES OBD-II Vehicles - OBD-II Readiness Monitors

Fig. 5: Inspection/Maintenance Complete System Set Procedure - 2 Of 2 (2001-2003 GM Vehicles -
Except Metro, Prizm, Saturn & Tracker)

1998 Chevrolet Pickup C1500

DRIVE CYCLES OBD-II Vehicles - OBD-II Readiness Monitors

Courtesy of GENERAL MOTORS CORP.

HONDA

For drive cycle test procedures, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.

LEXUS

NISSAN

DRIVE CYCLES (1996 & 1997 MODELS)

Introduction

To identify the correct drive pattern, the following information is need:

z

Vehicle Model

z

Year

z

Engine Type

z

Transmission Type

z

Emissions Certification (California Or Federal)

z

Powertrain (Trucks: 2WD Or 4WD)

z

ECM Part Number

The following tables should be used to identify which Drive Pattern(s) to be used on specified models. See Fig.
6 and Fig. 7 . To identify SRT drive pattern layout, see Fig. 8 .

For more information on 1996 and 1997 SRT drive patterns, see Technical Service Bulletin No. NTB98-01C,
dated January 3, 2003. See SYSTEM READINESS TEST (SRT) DRIVE PATTERNS .

NOTE:

Drive cycles for Honda models are also known as "System Readiness Codes".

NOTE:

Drive cycles for Lexus models are also known as "Test Drive Confirmation"
tests. These Test Drive Confirmation tests are included in the appropriate
Diagnostic Trouble Code tests. For drive cycle test procedures, see appropriate
SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.

NOTE:

Drive cycles are referred to as System Readiness Test (SRT) drive patterns.

1998 Chevrolet Pickup C1500

DRIVE CYCLES OBD-II Vehicles - OBD-II Readiness Monitors