Manual Lexus LS 500 - 2021 (page 458 of 590) (English)

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7-2. Steps to take in an emergency

tem while the engine is off. (Except when

the engine is stopped by the Stop & Start

system.)

●

Turn off any unnecessary electrical com-

ponents when the vehicle is running at a

low speed for an extended period, such

as in heavy traffic.

■

When the battery is removed or dis-

charged

●

Information stored in the ECU is cleared.

When the battery is depleted, have the

vehicle inspected at any authorized

Lexus retailer or Lexus authorized

repairer, or any reliable repairer.

●

Some systems may require initialization.

(P.492)

■

When removing the battery terminals

When the battery terminals are removed,

the information stored in the ECU is

cleared. Before removing the battery termi-

nals, contact any authorized Lexus retailer

or Lexus authorized repairer, or any reliable

repairer as soon as possible.

■

Charging the battery

The electricity stored in the battery will dis-

charge gradually even when the vehicle is

not in use, due to natural discharge and the

draining effects of certain electrical appli-

ances. If the vehicle is left for a long time,

the battery may discharge, and the engine

may be unable to start. (The battery

recharges automatically during driving.)

■

After jump starting the vehicle

Be sure to disable the Stop & Start system

so that the battery can be charged.

(P.285)

■

When recharging or replacing the bat-

tery

●

In some cases, it may not be possible to

unlock the doors using the smart entry &

start system when the battery is dis-

charged. Use the wireless remote control

or the mechanical key to lock or unlock

the doors.

●

The engine may not start on the first

attempt after the battery has recharged

but will start normally after the second

attempt. This is not a malfunction.

●

The engine switch mode is memorized by

the vehicle. When the battery is recon-

nected, the system will return to the

mode it was in before the battery was dis-

charged. Before disconnecting the bat-

tery, turn the engine switch off.

If you are unsure what mode the engine

switch was in before the battery dis-

charged, be especially careful when

reconnecting the battery.

●

For a while after the battery terminals

have been disconnected and recon-

nected, for a while after the battery has

been replaced, the Stop & Start system

may not automatically stop the engine for

approximately 5 to 60 minutes.

●

If the battery discharges, it may not be

possible to shift the shift position to other

positions. In this case, the vehicle cannnot

be towed without lifting both rear wheels

because the rear wheels will be locked.

■

When replacing the battery

●

Use a Central Degassing type battery

(European Regulations).

●

Use a genuine battery specifically

designed for use with the Stop & Start

system or a battery with equivalent speci-

fications to a genuine battery. If an unsup-

ported battery is used, Stop & Start

system functions may be restricted to

protect the battery.

Also, battery performance may decrease

and the engine may not be able to restart.

Contact any authorized Lexus retailer or

Lexus authorized repairer, or any reliable

repairer for details.

●

Use a battery with the same case size as

the previous battery and an equivalent

20 hour rate capacity (20HR) or greater.

• If the sizes differ, the battery cannot be

properly secured.

• If the 20 hour rate capacity is low, even if

the time period where the vehicle is not

used is a short time, the battery may dis-

charge and the engine may not be able to

start.

●

Use a battery with a handle. If a battery

without a handle is used, removal is more

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Lexus LS 500 - 2021 Manual

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