Recharging/Reconnecting The Battery; Starting With A Dead Key Fob Battery - Lexus ES300h Towing And Road Service Manual

Connect the clamp at the other end of the negative cable to a solid, stationary, unpainted metallic
point away from the discharged battery such as the trunk latch striker, as shown (Figure 19).
If using a portable jump pack:
o Connect the positive cable of the jump pack to the positive terminal of the discharged battery
o Connect the negative cable of the jump pack to a solid, stationary, unpainted metallic point
away from the discharged battery such as the trunk latch striker, as shown (Figure 19).
o If the jump pack has an ON/OFF switch, turn the jump pack on
Start the engine of the second vehicle. Increase the engine speed slightly and maintain that level for
approximately 5 minutes to recharge the 12-volt battery in the Lexus ES300h
Maintain the engine speed of the second vehicle and start the hybrid system by turning the "POWER"
switch to ON mode
Make sure the "READY" indicator comes on. If the indicator does not come on, follow the start
override procedures listed below
Once the hybrid system has started, remove the jumper cables in the exact reverse order from which
they were connected
After recharging/reconnecting the 12-volt battery:
Unlocking the doors using the smart key system may not be possible immediately after reconnecting the 12-
volt battery. If this happens, use the wireless remote control or the mechanical key to lock/unlock the doors.
Start the hybrid system with the "POWER" switch in ACCESSORY mode. The hybrid system may not start with
the "POWER" switch turned OFF. However, the hybrid system will operate normally from the second attempt.
The "POWER" switch mode is recorded by the vehicle. If the battery is reconnected, the vehicle will return the
"POWER" switch mode to the status it was in before the battery was disconnected. Make sure to turn off the
power before disconnecting the battery. Take extra care when connecting the battery if the "POWER" switch
mode prior to discharge is unknown.
Caution: When recharging the 12-volt battery NEVER recharge the 12-volt battery while the hybrid system is
operating. Also, be sure all accessories are turned off.

Starting with a dead key fob battery:

This vehicle displays a symbol on the instrument panel to indicate that it recognizes the correct key being in
the vehicle. The symbol looks like this:
If this symbol isn't displayed when you attempt to start the vehicle, you may be dealing with a dead key fob
battery or another problem where the following procedures may allow the vehicle to be started.
Discharge Key Fob Battery Override
Figure 20
Depress and hold the brake pedal
Hold the Lexus emblem side of the key fob next to
the Power Button allowing system to recognize the
key fob (Figure 20)
Depress and hold the start button
12