Lexus 2012 RX450h Owner's Manual page 923

Start the engine of the second vehicle. Increase the engine
STEP 3
speed slightly and maintain that level for approximately 5 min-
utes to recharge the battery of your vehicle.
Open and close any of the doors with the "ENGINE START
STEP 4
STOP" switch off.
Maintain the engine speed of the second vehicle and start the
STEP 5
engine of your vehicle by turning the "ENGINE START STOP"
switch to IGNITION ON mode.
Once the vehicle' s engine has started, remove the jumper
STEP 6
cables in the exact reverse order from which they were con-
nected.
Once the engine starts, have the vehicle inspected at your Lexus
dealer as soon as possible.
Starting the engine when the 12-volt battery is discharged
■
The engine cannot be started by push-starting.
To prevent 12-volt 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.
When the 12-volt battery is removed or discharged
■
The power back door must be initialized. (P. 996)
Charging the 12-volt battery
■
The electricity stored in the 12-volt battery will discharge gradually even when
the vehicle is not in use, due to natural discharge and the draining effects of cer-
tain electrical appliances. If the vehicle is left for a long time, the 12-volt battery
may discharge, and the engine may be unable to start. (The 12-volt battery
recharges automatically during driving.)
5-2. Steps to take in an emergency
5
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