Lexus LFA Owner's Manual page 351

Start the engine of the second vehicle. Increase the engine speed
STEP 3
slightly and maintain at that level for approximately 5 minutes to
recharge the battery of your vehicle.
Maintain the engine speed of the second vehicle and start the
STEP 4
engine of your vehicle.
Once the vehicle' s engine has started, remove the jumper cables
STEP 5
in the exact reverse order from which they were connected.
After disconnecting the jumper cables, make sure that the negative (-)
battery terminal on your vehicle is fixed securely.
Once the engine starts, have the vehicle inspected at your Lexus dealer
as soon as possible.
Starting the engine when the battery is discharged
■
If the gear indicator is not displayed when an attempt is made to start the
●
engine, the engine is not yet ready to start. Depress the brake pedal for several
seconds and wait for the gear indicator to appear.
The engine cannot be started by push-starting.
●
To prevent battery discharge
■
Turn off the headlights and the audio system while the engine is off.
●
Turn off any unnecessary electrical components when the vehicle is running at a
●
low speed for an extended period, such as in heavy traffic.
5-2. Steps to take in an emergency
5
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