Obd-Ii Drive Cycles: Overview Mazda 3 BL

OBD-II Drive Cycle Description

OBD-II drive cycle is a pattern of driving in which the PCM will execute all OBD-II diagnostic monitors. Drive cycle can be used to cause a DTC to set if fault is present or to verify a DTC will not return after a repair has been completed. If drive cycle is completed and P1000 is not cleared, repeat entire drive cycle.

Note. Rough road conditions may prevent certain steady state conditions and steady accelerations from validating the transmission and load related monitors.

OBD-II drive cycle is a pattern of driving in which the PCM will execute all OBD-II diagnostic monitors. Drive cycle can be used to cause a DTC to set if a fault is present or to verify that a DTC will not return after a repair has been completed. If drive cycle is complete and P1000 is not cleared, repeat entire drive cycle.

Note. Rough road conditions may prevent certain steady state conditions and steady accelerations from validating the transmission and load related monitors.

Description Of OBD II Drive Cycle

The purpose of the OBD II drive cycle is to execute the OBD II monitors and identify any concerns with the OBD II system. The DTC P1000 code will be erased of all OBD II monitors that have completed during the OBD II drive cycle.

The NGS Tester will be used to observe the status of each OBD II monitor at the completion of the OBD II drive cycle. The completion status of the exhaust gas re-circulation (EGR), heated oxygen sensor (HO2S), evaporative emission (EVAP), and catalyst efficiency monitors can be monitored during the OBD II drive cycle by viewing the On-Board Readiness Menu on the NGS Tester.

OBD-II drive cycle is a pattern of driving in which the PCM will execute all OBD-II diagnostic monitors. Systems monitored include the following

1. EGR system.
2. Oxygen sensor.
3. Oxygen sensor heater.
4. Catalytic converter.
5. Fuel, misfire and EVAP system.

Drive cycle can be used to cause a DTC to set if a fault is present or to verify that a DTC will not return after a repair has been completed. If drive cycle is complete and P1000 is not cleared, repeat entire drive cycle.

OBD-II Drive Mode Description

OBD-II drive mode is a pattern of driving in which the PCM will execute the following OBD-II diagnostic monitors

1. EGR system.
2. Oxygen sensor and oxygen sensor heater.
3. Catalytic converter.
4. Fuel, misfire and evaporative emission control system.

There are 2 types of drive modes; standard drive mode and individual system repair verification dive mode. Once a drive mode is started, engine must not be turned off. Drive mode can be used to cause a DTC to set if a fault is present or to verify that a DTC will not return after a repair has been completed.

Note. Rough road conditions may prevent certain steady state conditions and steady accelerations from validating transmission and load related monitors.

EVAP monitor will not activate if ambient air temperature outside is not 40-100°F (4-38°C), or vehicle is above 8000 feet. If DTC P1000 has to be cleared when ambient air temperature outside is not 40-100°F (4-38°C), or vehicle is above 8000 feet, PCM must detect these conditions once (twice on some models) before EVAP monitor can be "by-passed" and DTC P1000 will clear. Perform EVAP MONITOR "BY-PASS" PROCEDURE .

All OBD-II drive cycles must be performed using scan tool. Consult scan tool manufacturers instruction manual for drive cycle procedure. Vehicle should be driven at steady speeds during cruise or acceleration to help complete OBD-II monitors. Operate engine throttle in a steady fashion to minimize time required for monitor completion. EVAP monitor only operates during first 30 minutes of engine run time. If performing EVAP monitor procedure, drive vehicle at a steady rate and at part throttle to minimize possible "fuel slosh".

OBD-II drive mode is a pattern of driving in which the Powertrain Control Module (PCM) will execute the following OBD-II diagnostic monitors

1. EGR system.
2. Oxygen sensor and oxygen sensor heater.
3. Catalytic converter.
4. Fuel, misfire and evaporative emission control system.

DO NOT disconnect battery during and after drive mode. Disconnecting battery will reset memory. Drive mode can be used to cause a DTC to set if a fault is present or to verify that a DTC will not return after a repair has been completed.

OBD-II drive mode is a pattern of driving in which the Powertrain Control Module (PCM) will execute the following OBD-II diagnostic monitors

1. EGR system.
2. Oxygen sensor and oxygen sensor heater.
3. Catalytic converter.
4. Fuel, misfire and evaporative emission control system.

DO NOT disconnect battery during and after drive mode. Disconnecting battery will reset memory. Drive mode can be used to cause a DTC to set if a fault is present or to verify that a DTC will not return after a repair has been completed.

OBD-II drive mode is a pattern of driving in which the Powertrain Control Module (PCM) will execute the following OBD-II diagnostic monitors

1. EGR system.
2. Oxygen sensor and oxygen sensor heater.
3. Catalytic converter.
4. Fuel, misfire and evaporative emission control system.

DO NOT disconnect battery during and after drive mode. Disconnecting battery will reset memory. Drive mode can be used to cause a DTC to set if a fault is present or to verify that a DTC will not return after a repair has been completed.

OBD-II drive mode is a pattern of driving in which the Powertrain Control Module (PCM) will execute the following OBD-II diagnostic monitors

1. EGR system.
2. Oxygen sensor and oxygen sensor heater.
3. Catalytic converter.
4. Fuel, misfire and evaporative emission control system.

DO NOT disconnect battery during and after drive mode. Disconnecting battery will reset memory. Drive mode can be used to cause a DTC to set if a fault is present or to verify that a DTC will not return after a repair has been completed.

OBD-II drive mode is a pattern of driving in which the PCM will execute following OBD-II diagnostic monitors

1. Catalytic converter.
2. EGR system.
3. Fuel, misfire and evaporative emission control system.
4. Oxygen sensor and oxygen sensor heater.

DO NOT disconnect battery during and after drive mode. Disconnecting battery will reset memory. Drive mode can be used to cause a DTC to set if a fault is present or to verify that a DTC will not return after a repair has been completed. If OBD-II system inspection is not completed during Drive Mode, check for following causes

1. OBD-II system detects malfunction.
2. Drive Mode procedure was not completed correctly.

Scan tool can be used at anytime during Drive Mode to monitor completion status. Monitoring can be done by accessing ON BOARD SYSTEM READINESS menu.

OBD-II drive mode is driving vehicle in specific pattern, in which OBD-II system is being inspected for proper operation. Drive mode must be performed to ensure no additional DTCs are present. During drive mode the Powertrain Control Module (PCM) will execute the following OBD-II diagnostic monitors

1. EGR system.
2. Heated Oxygen Sensor (HO2S) and HO2S heater.
3. Catalytic converter (TWC).
4. Fuel, misfire and evaporative (EVAP) emission control system.

DO NOT disconnect battery during and after drive mode. Disconnecting battery will reset memory. Drive mode can be used to cause a DTC to set if a fault is present or to verify that a DTC will not return after a repair has been completed.

Note. Vehicle speed and engine speed detected by PCM may differ from that indicated by speedometer and tachometer. Use NGS tester or equivalent to monitor vehicle speed. If OBD-II system inspection is not completed during Drive Mode, the following causes are considered: OBD-II system detects malfunction. Drive Mode procedure is not completed correctly.

OBD-II drive mode is performed to inspect proper operation and ensure no additional DTCs are present. During drive mode, following OBD-II systems are inspected

1. EGR system.
2. HO2S and HO2S heater.
3. Three-way Catalytic (TWC) converter.
4. Fuel, misfire and evaporative (EVAP) system.

Note. DO NOT disconnect battery during and after drive mode. Disconnecting battery will reset memory. If OBD-II system inspection is not completed during drive mode, OBD-II system detects malfunction or drive mode procedure has not been completed correctly.

The following procedure is designed to execute and complete the OBD monitors, and to clear the P1000, I/M readiness code. To complete a specific monitor for repair verification, follow steps 1 through 4, then continue with the step described by the appropriate monitor found under the OBD Monitor Exercised column. For the EVAP/secondary AIR monitor to run, the ambient air temperature must be between 4.4 to 37.8°C (40 to 100°F), and the altitude below 2,438 meters (8,000 feet). If the P1000 code must be cleared in these conditions, the PCM must detect them once (twice on some: applications) before the EVAP/secondary AIR monitor can be bypassed and DTC P1000 is cleared. The EVAP/secondary AIR bypassing procedure is described in the following drive cycle.

The OBD drive cycle is carried out using a scan tool. Refer to the manufacturer's instruction manual for each described function.

For a detailed description for clearing the DTCs, see , Clear the Continuous Diagnostic Trouble Codes (DTCs) and Reset the Emission Monitors Information in the Powertrain Control Module (PCM) in ELECTRONIC ENGINE CONTROL (EEC) SYSTEM .

The IDS or equivalent tester will be used to observe the status of each OBD II monitor at the completion of the OBD II drive cycle. The completion status of the exhaust gas recirculation (EGR), heated oxygen sensor (HO2S), evaporative emission (EVAP), and catalyst efficiency monitors can be monitored during the OBD II drive cycle by viewing the On-Board Readiness Menu on the IDS or equivalent tester.

Description

The following procedure is designed to execute and complete the OBD monitors and to clear the P1000, l/M readiness code. To complete a specific monitor for repair verification, follow steps 1 through 4 , then continue with the step described by the appropriate monitor found under the OBD Monitor Exercised column. For the EVAP/secondary AIR monitor to run, the ambient air temperature must be between 4.4 to 37.8°C (40 to 100°F), and the altitude below 2,438 meters (8,000 feet). If the P1000 code must be cleared in these conditions, the PCM must detect them once (twice on some applications) before the EVAP monitor can be bypassed and DTC P1000 is cleared. The EVAP bypassing procedure is described in the following drive cycle.

The OBD drive cycle is carried out using a scan tool. Refer to the manufacturer's instruction manual for each described function.

For a detailed description for clearing the DTCs, see CLEAR THE CONTINUOUS DTCS AND RESET THE EMISSION MONITORS INFORMATION IN THE PCM.

The IDS or equivalent tester will be used to observe the status of each OBD II monitor at the completion of the OBD II drive cycle. The completion status of the exhaust gas recirculation (EGR), heated oxygen sensor (HO2S), evaporative emission (EVAP), and catalyst efficiency monitors can be monitored during the OBD II drive cycle by viewing the On-Board Readiness Menu on the IDS or equivalent tester.