2001 Nissan Frontier Owner's Manual - Page 279

READINESS FOR INSPECTION/MAINTENANCE (I/M) TEST (US only) Due to legal requirements in some states and Canadian provinces, your vehicle may be required to be in the ready condition for an Inspection/Maintenance (I/M) test of the emission control system. The vehicle is set to the ready condition when it is driven through certain driving patterns. Usually, the ready condition can be obtained by ordinary usage of the vehicle. If a powertrain system component is repaired or the battery is disconnected, the vehicle may be reset to a not ready condition. Before taking the I/M test, drive the vehicle through the following pattern to set the vehicle to the ready condition. WARNING Always drive the vehicle in a safe and prudent manner according to traffic conditions and obey all traffic laws. 1. Start the engine when the engine coolant temperature gauge needle points to C. Allow the engine to idle until the gauge needle points between the C and H (normal operating temperature). 2. Accelerate the vehicle to 55 mph (88 km/h), then quickly release the accelerator pedal completely and keep it released for at least 6 seconds. 3. Quickly depress the accelerator pedal for a moment, then drive the vehicle at a speed of 53 to 60 mph (85 to 97 km/h) for at least 5 minutes. 4. Stop the vehicle. 5. Accelerate the vehicle to 35 mph (55 km/h) and maintain the speed for 20 seconds. 6. Repeat steps four through five at least three times. 7. Accelerate the vehicle to 55 mph (88 km/h) and maintain the speed for at least 3 minutes. 8. Stop the vehicle and turn the engine off. 9. Repeat steps one through eight at least one more time. If steps one through seven are interrupted, repeat the preceding step. Any safe driving mode is acceptable between steps. Do not stop the engine until step seven is completed. If you cannot or do not want to Technical and consumer information 10-29 perform the driving pattern, an authorized NISSAN dealer can conduct it for you. Dynamometer testing for Inspection/ Maintenance (I/M) test (US only) Due to legal requirements in some states/areas, your vehicle may be tested for emissions on a dynamometer. The transfer control lever (if so equipped) MUST be in the 2H position for I/M testing on a two wheel dynamometer. WARNING ● If the transfer control lever is not in the 2H position during the dynamometer I/M testing, the vehicle could come off the dynamometer and cause serious personal injury and/or body damage to the vehicle. ● Serious damage will occur to the 4WD system if the transfer control lever is not in the 2H position