Lexus IS250 2009 Service Manual page 417

5-2. Steps to take in an emergency
To change "ENGINE START STOP" switch modes: Within 10
STEP 3
seconds of the buzzer sounding, release the clutch pedal and
press the "ENGINE START STOP" switch. Modes can be
changed each time the switch is pressed.
( P. 126)
To start the engine: Press the "ENGINE START STOP" switch
within 10 seconds after the buzzer sounds, keeping the clutch
pedal depressed.
In the event that the engine still cannot be started, contact your Lexus
dealer.
Stopping the engine
n
For vehicles with an automatic transmission: Shift the shift lever to P and press the
"ENGINE START STOP" switch as you normally do when stopping the engine.
For vehicles with a manual transmission: Shift the shift lever to N position and press
the "ENGINE START STOP" switch as you normally do when stopping the engine.
Replacing the key battery
n
As the above procedure is the temporary measure, it is recommended that the
electronic key battery be replaced immediately when the battery depletes.
( P. 345)
420