Lexus 2016 GS350 Owner's Manual page 516

516
7-2. Steps to take in an emergency
Emergency start function
When the engine does not start, the following steps can be used as an interim
measure to start the engine if the engine switch is functioning normally.
Press the parking brake switch to check that the parking brake is set.
1
(P. 210)
Parking brake indicator will come on.
Shift the shift lever to P.
2
Turn the engine switch to ACCESSORY mode.
3
Press and hold the engine switch for about 15 seconds while depressing the
4
brake pedal firmly.
Even if the engine can be started using the above steps, the system may be mal-
functioning. Have the vehicle inspected by your Lexus dealer.
GS350_200t_GS F_OM_OM30E86U_(U)