OBD-II Drive Cycle Test Procedure
The primary function of OBD-II Drive Cycle is to clear DTC P1000. OBD-II Drive Cycle assists in identifying an OBD-II system problem through total monitor testing. Rerunning certain parts of drive cycle will verify repair of some monitor systems.
- For HO2S monitor repair verifications, perform steps 1) through 4) and steps 10) and 11).
- For EGR monitor repair verification, perform Steps 1) through Step 5) and steps 10) and 11).
- For Evaporative Emission monitor repair verification, perform Step 1) and Steps 7) through 11).
- For Misfire Detection monitor repair verification, perform the Misfire Detection Repair Verification Drive Cycle when directed here from the Misfire Pinpoint Tests. See MISFIRE DETECTION REPAIR VERIFICATION DRIVE CYCLE .
- For all other monitor repair verification, perform entire OBD-II Drive Cycle if directed here from the EEC-V Pinpoint Tests.
If driver is working alone, scan tool can be used after drive cycle is completed to view monitor system status. A scan tool can be installed in vehicle before drive cycle to observe DTC output. Scan tool an be used anytime through the couse of a drive cycle to observe monitor completion status by viewing On-Board Readiness Menu and PID Monitor Data Record Function.
CAUTION:
Observe posted speed limits and pay attention to current driving conditions while performing drive cycle tests.
NOTE:
Rough road surfaces may prevent some monitors from completeing and extreme ambient temperatures may pervent the HO2S, Catalyst (both steady state and Federal Test Procedure) and Evaporative Emission monitors from initiating.
NOTE:
If a particular drive mode of Drive Cycle is interrupted before completion, repeat drive mode. Once started, engine must not be turned off at any time during OBD-II Drive Cycle.
NOTE:
Vehicles with PTO must have system disengaged before OBD-II Drive Cycle is started.
NOTE:
The engine on all vehicle applications, (except, Escort/Tracer) must be warmed up to an operating temperature of at least 180,°F (82°C) before .proceeding with the OBD-II Drive Cycle (check ECT PID). The OBD-II drive cycle for the Escort/Tracer must be initiated on a cold start or at an ECT reading of less than 100°F (45°C) to assure completion of the evaporative thermister flow test (part of the comprehensive component monitor) and the catalyst monitor. This temperature can be verified with the ECT PID on the Scan Tool. Do not turn the engine off or restart anytime during the OBD-II Drive Cycle to clear DTC P1000. If a key off does occur, start the process from the beginning.
- Start engine. Drive vehicle or idle in neutral for 4 minutes.
- Idle vehicle in drive (neutral for M/T) for 40 seconds.
- Accelerate vehicle to 45 MPH (M/T upshift from 1st to 5th gear, but hold in 2nd gear for at least 5 seconds) at 1/4 to 1/2 throttle for 10 seconds.
- Drive vehicle with steady throttle at 45 MPH (M/T use 5th gear) for 30 seconds.
- Idle vehicle in Drive (neutral for M/T) for 40 seconds.
- Continue driving vehicle in city traffic at speeds between 25 and 40 MPH (M/T primarily drive vehicle in 3rd and 4th gear when possible) for 15 minutes. During 15 minute drive, the following modes must be achieved:
- At least 5 stop and idle modes at 10 seconds each.
- Accelerations from idle at 1/4 to 1/2 throttle.
- Choose 3 different speeds to do 1.5 minute steady state throttle drives.
- Accelerate vehicle up between 45 and 60 MPH (M/T upshift to 5th gear). This should take approximately 8 minutes.
- Drive vehicle and hold throttle steady at the selected speed between 45 and 60 MPH (M/T use 5th gear) for approximately 5 minutes.
- Drive vehicle for 5 minutes at varying speeds between 45 and 60 MPH (M/T use 5th gear).
- Bring the vehicle back to idle. Idle in drive (neutral for M/T) for 40 seconds.
- Rerun quick test. See QUICK TEST .