Phase 1: Engine Cool-down
- Start the engine and let it run in idle until the engine coolant reaches normal operating temperature.
- Switch off the engine and let it remain off for at least 10 minutes until it is completely cool down.
Phase 2: Engine Start and Drive Cycle
- Start the engine and drive the car for 1-2 minutes at a speed of 35-45 mph (56-72 km/h) without coming to a stop.
- Accelerate the car to 55-65 mph (88-105 km/h) and maintain that speed for at least 3 minutes.
- Slow down the car to 40-50 mph (64-80 km/h) and maintain that speed for at least 5 minutes without coming to a stop.
- Accelerate the car again to 55-65 mph (88-105 km/h) and maintain that speed for at least 2 minutes.
- Slow down the car and come to a stop, idling for about 1 minute with the engine running.
- Repeat steps 3-6 once more.
- Drive the car for at least 15 minutes at a steady speed of around 55 mph (88 km/h).
- Accelerate the car to 30-45 mph (48-72 km/h), let go of the accelerator and allow the car to coast to a stop.
Phase 3: Engine Shutdown
- Bring the car to a stop and park it.
- Switch off the engine and allow it to cool down for at least 5 minutes.
Note that this drive cycle represents the basic procedure and some variation may be necessary based on the specific diagnostic protocol of your Jaguar XJR's OBD2 system. it's always recommended to refer to the vehicle's owner's manual or technical documentation for the exact OBD2 drive cycle specific to your car model.
