Engine on or off?
Engine on as per prerequisites:
 Fluid Temperature 30...100 °C (86...210 °F), see Measuring Blocks, Group 019. 
 Selector Lever in P 
 Ignition ON 
 Engine ON (Idling) for one minute or more 
 Brake Pedal operated (hold for the whole procedure) 
 Throttle Pedal not operated