OBD Drive Cycle Information

OBD Drive Cycle Information

The following drive cycles may be used to exercise the monitors described in this document.

Drive Cycle A
1. Switch on the ignition for 30 seconds.
2. Ensure engine coolant temperature is less than 60 degree C.
3. Start the engine and allow to idle for 2 minutes.
4. Connect a generic scan tool and check for fault codes.

Drive Cycle B
1. Switch ignition on for 30 seconds.
2. Ensure engine coolant temperature is less than 60 degree C.
3. Start the engine and allow to idle for 2 minutes.
4. Perform 2 light accelerations, i.e. 0 to 35 mph with light pedal pressure.
5. Perform 2 medium accelerations, i.e. 0 to 45 mph with moderate pedal pressure.
6. Perform 2 hard accelerations, i.e. 0 to 55 mph with heavy pedal pressure.
7. Allow engine to idle for 2 minutes.
8. Connect a generic scan tool and, with the engine still running, check for fault codes.

Drive Cycle C
1. Switch ignition on for 30 seconds.
2. Ensure engine coolant temperature is less than 60 degree C.
3. Start the engine and allow to idle for 2 minutes.
4. Perform 2 light accelerations, i.e. 0 to 35 mph with light pedal pressure.
5. Perform 2 medium accelerations, i.e. 0 to 45 mph with moderate pedal pressure.
6. Perform 2 hard accelerations, i.e. 0 to 55 mph with heavy pedal pressure.
7. Cruise at 60 mph for 8 minutes.
8. Cruise at 50 mph for 3 minutes.
9. Allow engine to idle for 3 minutes.
10. Connect a generic scan tool and, with the engine still running, check for fault codes.

Drive Cycle D
1. Switch ignition on for 30 seconds.
2. Ensure engine coolant temperature is less than 35 degree C.
3. Start the engine and allow to idle for 2 minutes.
4. Perform 2 light accelerations, i.e. 0 to 35 mph with light pedal pressure.
5. Perform 2 medium accelerations, i.e. 0 to 45 mph with moderate pedal pressure.
6. Perform 2 hard accelerations, i.e. 0 to 55 mph with heavy pedal pressure.
7. Cruise at 60 mph for 5 minutes.
8. Cruise at 50 mph for 5 minutes.
9. Cruise at 35 mph for 5 minutes.
10. Allow engine to idle for 2 minutes.
11. Connect a generic scan tool and check for diagnostic trouble codes.

Drive Cycle E
1. Ensure fuel tank is at least a quarter full.
2. Carry out drive cycle A.
3. Switch off ignition.
4. Leave vehicle undisturbed for 20 minutes.
5. Switch on ignition.
6. Connect a generic scan tool and check for diagnostic trouble codes.

Drive Cycle F
1. Switch ignition on for 30 seconds.
2. Ensure Engine Coolant Temperature is less than 60 degree C (140 degree F).
3. Start Engine.
4. Ensure vehicle is in "High Range".
5. Allow engine to idle for 2 minutes.
6. Cruise at 50 mph for 2 minutes.
7. Allow engine to idle for 2 minutes.
8. Select "Low Range".
9. Allow engine to idle for 2 minutes.
10. Perform 2 light accelerations (0 to 10 mph with light pedal pressure).
11. Perform 2 medium accelerations (0 to 20 mph with moderate pedal pressure).
12. Cruise at 30 mph for 2 minutes.
13. Select "High Range".
14. Cruise at 50 mph for 2 minutes.
15. Allow engine to idle for 2 minutes.
16. Connect a generic scan tool and check for diagnostic trouble codes.