When trouble arises -> If the vehicle battery is discharged for Your Toyota 4 Runner SUV Fifth Generation (2010-2024)

515  
7-2. Steps to take in an emergency  
If the vehicle battery is discharged  
The following procedures may be used to start the engine if the  
vehicle’s battery is discharged.  
You can also call your Toyota dealer or a qualified repair shop.  
If you have a set of jumper (or booster) cables and a second vehicle  
with a 12-volt battery, you can jump start your vehicle by following the  
steps below.  
1
Confirm that the electronic key  
is being carried.  
When connecting the jumper (or  
booster) cables, depending on the  
situation, the alarm may activate  
and doors locked. (P. 80)  
2
Open the hood (P. 412)  
7
4RUNNER (U)  
516  
7-2. Steps to take in an emergency  
3
Connect the jumper cables according to the following procedure:  
Connect a positive jumper cable clamp to the positive (+) battery  
terminal on your vehicle.  
1
2
3
4
Connect the clamp on the other end of the positive cable to the  
positive (+) battery terminal on the second vehicle.  
Connect a negative cable clamp to the negative (-) battery termi-  
nal on the second vehicle.  
Connect the clamp at the other end of the negative cable to a  
solid, stationary, unpainted metallic point away from the battery  
and any moving parts, as shown in the illustration.  
4
Start the engine of the second vehicle. Increase the engine speed  
slightly and maintain at that level for approximately 5 minutes to  
recharge the battery of your vehicle.  
5
6
Open and close any of the doors of your vehicle with the engine  
switch off.  
Maintain the engine speed of the second vehicle and turn the  
engine switch to IGNITION ON mode, then start the vehicle’s  
engine.  
7
Once the vehicle’s engine has started, remove the jumper cables in  
the exact reverse order from which they were connected.  
Once the engine starts, have the vehicle inspected at your Toyota  
dealer as soon as possible.  
4RUNNER (U)  
517  
7-2. Steps to take in an emergency  
Starting the engine when the battery is discharged  
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.  
Charging the battery  
The electricity stored in the 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 battery may  
discharge, and the engine may be unable to start. (The battery recharges  
automatically during driving.)  
When recharging or replacing the battery  
In some cases, it may not be possible to unlock the doors using the smart  
key system when the battery is discharged. 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  
reconnected, the system will return to the mode it was in before the battery  
was discharged. Before disconnecting the battery, 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.  
Make sure that the key is not inside the vehicle when recharging or replac-  
ing the battery. The key may be locked in the vehicle if the alarm is acti-  
vated. (P. 80)  
7
4RUNNER (U)  
518  
7-2. Steps to take in an emergency  
WARNING  
Avoiding battery fires or explosions  
Observe the following precautions to prevent accidentally igniting the flam-  
mable gas that may be emitted from the battery:  
Make sure each jumper cable is connected to the correct terminal and that  
it is not unintentionally in contact with any other than the intended terminal.  
Do not allow the other end of the jumper cable connected to the “+” termi-  
nal to come into contact with any other parts or metal surfaces in the area,  
such as brackets or unpainted metal.  
Do not allow the + and - clamps of the jumper cables to come into contact  
with each other.  
Do not smoke, use matches, cigarette lighters or allow open flame near  
the battery.  
Battery precautions  
The battery contains poisonous and corrosive acidic electrolyte, while  
related parts contain lead and lead compounds. Observe the following pre-  
cautions when handling the battery:  
When working with the battery, always wear safety glasses and take care  
not to allow any battery fluids (acid) to come into contact with skin, clothing  
or the vehicle body.  
Do not lean over the battery.  
In the event that battery fluid comes into contact with the skin or eyes,  
immediately wash the affected area with water and seek medical attention.  
Place a wet sponge or cloth over the affected area until medical attention  
can be received.  
Always wash your hands after handling the battery support, terminals, and  
other battery-related parts.  
Do not allow children near the battery.  
NOTICE  
When handling jumper cables  
When connecting the jumper cables, ensure that they do not become entan-  
gled in the cooling fans or engine drive belt.  
4RUNNER (U)