Drive Cycle Procedure
-- Connect the scan tool.
-- Start the vehicle.
-- Idle the vehicle for 2-3 minutes. This executes the O2 heater, misfire, secondary air injection, fuel trim, and purge system monitors.
-- Drive the vehicle at 45-55 mph for a continuous 7 minute period - avoid stopping. This executes the evaporative, O2 sensor, fuel trim, and misfire monitors.
-- Accelerate the vehicle to an engine speed of 5000 RPM; lift off the throttle until the engine speed is around 1200 rpm. This executes the fuel cut off.
-- Accelerate the vehicle smoothly to 60-65 mph, cruise constantly for 5 min, this executes the catalyst; O2 sensor, misfire, fuel trim, and purge system monitors.
-- Decelerate and idle the vehicle again for 3 minutes. This executes the misfire, secondary sir injection, fuel trim, and purge system monitors.
-- Check the status of the readiness code.
Depending on the scan tool used. The readiness code status may be displayed as complete, passed or OK.
-- If any engine monitor fails to set a readiness code pass, the drive cycle test should be repeated.
When repeating the drive cycle operation for a failed evaporative or thermostat monitor, allow the engine to cool until the coolant temperature and the ambient air temperature are be between 10° C and 35° C with a difference no greater than 4° C and repeat the drive cycle operation.
If the drive cycle operation fails again.
-- Check the DTC memory for stored DTCs.
Repair the vehicle if necessary.
-- Repeat the drive cycle operation until all engine monitors have successfully run through and passed.
-- Remove the scan tool and switch the ignition off.