OBD II Drive Cycle

DESCRIPTION
The primary intention of the OBD II Drive Cycle is to clear the DTC P1000. The OBD II Drive Cycle assists in identifying an OBD II system problem through total monitor testing.

However, a rerun of a certain part of this drive cycle will verify the repair of some monitor system.

DIAGNOSTIC NOTES

- For HO2S monitor repair verification, perform Steps 1 through 4 and Steps 10 and 11.

- For EGR monitor repair verification, perform Steps 1 through 5 and Steps 10 and 11.

- For EGR monitor repair verification on Probe, perform Steps 1 through 8 and Steps 10 and 11.

- For Evaporative Emission monitor repair verification, perform Step 1 and Steps 7 through 11.

- For Evaporative Emission monitor repair verification on Probe, perform Steps 1 through 5 and Step 11.

- For Misfire Detection monitor repair verification, perform the Misfire Detection Repair Verification Drive Cycle.

- For all other monitor repair verification, perform the entire OBD II Drive Cycle if directed here from the EEC-V Pinpoint Tests.

If the driver is working alone, it is recommended that the scan tool be used after a drive cycle is completed to observe a monitor system status. However, a scan tool can be installed in the vehicle before a drive cycle to observe DTC output. Also, the scan tool can be used anytime through the course of a drive cycle to observe monitor completion status by viewing the On-board Readiness Menu and PID Monitor Data Record Function.

CAUTION: Strict observance of posted speed limits and attention to driving conditions are mandatory when proceeding through the following drive cycles.

Rough road surfaces may prevent some monitors from completing and extreme ambient temperatures may prevent the Heated Oxygen Sensor (HO2S), Catalyst (both steady state and Federal Test Procedure) and Evaporative Emission monitors from initiating.

NOTE: Vehicles equipped with Power Take-Off (PTO) must have that system disengaged before the OBD II Drive Cycle is initiated.

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 Thermistor 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.

PROCEDURE
In the event that a particular drive mode of the OBD II Drive Cycle is interrupted before completion, repeat this drive mode. Once started, the engine must not be turned off at any time during the OBD II Drive Cycle. The summary chart shows a graphic representation of an OBD II Drive Cycle.
1. Start the engine. Drive the vehicle or idle in neutral for 4 minutes. Probe requires a drive or idle in neutral for 9 minutes.
2. Idle the vehicle in drive (neutral for M/T) for 40 seconds.
3. Accelerate the vehicle to 45 MPH (M/T up shift 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. When driving an Escort/Tracer or a Probe, accelerate to 35 MPH (M/T up shift to 3rd gear) at 1/2 to 3/4 throttle for 10 seconds.
4. Drive the vehicle with a steady throttle at 45 MPH (M/T use 5th gear) for 30 seconds. When driving an Escort/Tracer or a Probe, hold a steady throttle at 35 MPH (M/T use 3rd gear) for 30 seconds.
5. Idle the vehicle in drive (neutral M/T) for 40 seconds. Probe requires this idle to be for at least 2 minutes
6. Continue to drive the 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 the 15 minute drive the following modes must be achieved:
a. At least 5 stop and idle modes at 10 seconds each.
b. Accelerations from idles at 1/4 to 1/2 throttle position (Escort/Tracer use 1/2 to 3/4 throttle position).
c. Choose 3 different speeds to do 1.5 minute steady state throttle drives. However, on the Probe, the last steady state throttle drive should be between 25 and 40 MPH for 5 minutes.
7. Accelerate the vehicle up between 45 and 60MPH (M/T up shift to 5th gear). This should take approximately 8 minutes.
8. Drive vehicle and hold the throttle steady at the selected speed between 45 and 60MPH (M/T use 5th gear) for approximately 5 minutes.
9. Drive vehicle for 5 minutes at varying speeds between 45 and 60MPH (M/T use 5th gear).
10. Bring the vehicle back to idle. Idle in drive (neutral for M/T) for 40 seconds.
11. Rerun Quick Test. Refer to Diagnostic Subroutine / DSR 1 - Vehicle Preparation.

OBDII Drive Cycle Chart:

SPECIAL NOTES
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 Thermistor 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.

a. For Probe a drive or idle in neutral for 9 minutes in Step 1 and an idle in drive (neutral for M/T) for 2 minutes in Step 5 is necessary to satisfy conditions to initiate the Evaporative Emission Monitor.

b. For Escort/Tracer and Probe acceleration to no more than 35 MPH (M /T in 4th gear) and a steady throttle at that speed is required for HO2S Monitor completion.

c. The city drive 25 to 40 MPH (M/T in 3rd and 4th gear) must include the following driving modes:
- At least 5 stop and idle (A/T in drive and M/T in neutral) modes at 10 seconds each.
- Accelerations from idles at 1/4 to 1/2 throttle position (for Escort/Tracer use 1/2 to 3/4 throttle position).
- Choose 3 different speeds between 25 and 40 MPH (M/T in 3rd and 4th gear) to do a 15 minute steady state throttle drive.
- A steady state throttle between 25 and 40 MPH near the end of the 15 minute drive is required on the Probe to meet conditions to run the steady state portion of the Catalyst Monitor.

d. The Evaporative Emission Monitor may not initiate in ambient temperatures below 400°F and above 110°F. Both the Evaporative Emission Monitor and Misfire Detection Monitor do not have to initiate or complete in order to clear the DTC P1000.

e. The EGR Monitor on the Probe extends through the completion of the steady throttle drive at 50 to 60 MPH for 5 seconds.