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  • Setting the Clock

HEATED OXYGEN SENSORS MONITOR DRIVE CYCLE

Upstream (Universal) oxygen sensors.

• Engine OFF; cooling fans inoperative > 20 seconds.
• Start engine and bring to normal operating temperature > 82 °C (180 °F).
• Drive the vehicle between 3000 – 4000 rpm at a steady speed. Lift foot completely off accelerator and coast to a stop within 30 seconds. Do not touch accelerator pedal for 4 seconds after coming to a stop.
• Repeat step above.
• Idle engine for 11 minutes.

Downstream oxygen sensors:

• 1 Start engine and bring to normal operating temperature > 82 °C (180 °F).
• 2 Drive the vehicle steadily between 48 – 97 km/h (30 – 60 mph) for 10 minutes.
• 3 Drive the vehicle above 3000 rpm in 4th gear at a steady speed. Lift foot completely off accelerator and coast for 30 seconds.

Oxygen sensor heaters:

• Start engine and bring to normal operating temperature > 82 °C (180 °F).
• 2 Idle engine for 3 minutes.