2020 TOYOTA PRIUS C light

5158-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U
■The compact spare tire
●The compact spare tire is identified by the label “TEMPORARY USE
ONLY” on the tire sidewall.
Use the compact spar e tire temporarily, and only in an emergenc y.
●Make sure to check the tire inflation pressure of the compact s pare tire.
(  P. 5 4 3 )
■After completing the tire change
The tire pressure warni ng system must be reset. ( P. 436)
■When using the compact spare tire
As the compact spare tire is not equipped with a tire pressure warning
valve and transmitter, low inflation pressure of the spare tire will not be
indicated by the tire pressure warning system. Also, if you rep lace the
compact spare tire after the tire pressure warning light comes on, the light
remains on.
■If you have a flat front tire on a road covered with snow or ic e
Install the compact spare tire on one of the rear wheels of the vehicle.
Perform the following steps and f it tire chains to the front tires:
Replace a rear tire with the compact spare tire.
Replace the flat front tire with the tire removed from the rear of the vehi-
cle.
Fit tire chains to the front tires.
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5188-2. Steps to take in an emergency
PRIUS c_U
One of the following may be the cause of the problem:
● Vehicles with a smart key system: The electronic key may not be
functioning properly. ( P. 520)
● There may not be sufficient f uel in the vehicle’s tank.
Refuel the vehicle. ( P. 221)
● Vehicles with immobilizer syste m: There may be a malfunction in
the immobilizer system. ( P. 8 8 )
● There may be a malfunction i n the steering lock system.
● Vehicles with a smart key system : The hybrid system may be mal-
functioning due to an electrical problem such as an open circui t or a
blown fuse. However, depending on the type of malfunction, an
interim measure is available to start the hybrid system. (P. 519)
One of the following may be the cause of the problem:
● The 12-volt battery may be discharged. ( P. 522)
● The 12-volt battery terminal conn ections may be loose or corroded.
(  P. 431)
If the hybrid system will not start
Reasons for the hybrid system not starting vary depending on
the situation. Check the followi ng and perform the appropriate
procedure:
The hybrid system will not start even though the correct starting
procedure is being followed. ( P. 188, 192)
The interior lights and headlights are dim, or the horn does no t
sound or sounds at a low volume.

5198-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U
One of the following may be the cause of the problem:
● The 12-volt battery may be discharged. ( P. 522)
● One or both of the 12-volt battery terminals may be disconnecte d.
(  P. 431)
Contact your Toyota dealer if the problem cannot be repaired, o r if repair
procedures are unknown.
When the hybrid system does not start, the following steps can be
used as an interim measure to sta rt the hybrid system if the power
switch is functioning normally.
Do not use this starting procedure except in case of emergency.
Set the parking brake.
Shift the shift lever to P.
Turn the power switch to ACCESSORY mode.
Press and hold the power swi tch for about 15 seconds.
Even if the hybrid system can be started using the above steps, the
system may be malfunctioning. Hav e the vehicle inspected by your
Toyota dealer.
The interior lights and headlights do not turn on, or the horn
does not sound.
Emergency start function (vehicles with a smart key system)
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5238-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U
Connect the jumper cables according to the following procedure:Connect a positive jumper cable clamp to the exclusive jump
starting terminal on your vehicle.
Connect the clamp on the other end of the positive cable to the
positive (+) battery termi nal on the second vehicle.
Connect a negative cable clamp to the negative (-) battery term i-
nal on the s econd vehicle.
Connect the clamp at the other e nd of the negative cable to a
solid, stationary, unpainted meta llic point away from the exclusive
jump starting terminal and any moving parts, as shown in the
illustration.
Start the engine of the second v ehicle. Increase the engine speed
slightly and maintain at that lev el for approximately 5 minutes to
recharge the 12-volt battery of your vehicle.
Vehicles with a smart key system only: Open and close any of th e
doors of your vehicle wi th the power switch off.3
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5258-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U
■Starting the hybrid system when the 12-volt battery is discharged
The hybrid system cannot be started by push-starting.
■ To prevent 12-volt battery discharge
●Turn off the headlights and the audio system while the hybrid s ystem 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 .
■ Precautions when the 12-volt batte ry is discharged (vehicles with a
smart key system)
● In some cases, it may not be possible to unlock the doors using the smart
key system immediately after the 12-volt battery has been disco nnected and
reconnected. Use the wireless remote control or the mechanical key to lock
or unlock the doors.
● The hybrid system may not start on the first attempt after the 12-volt battery
has recharged but will start normally after the second attempt. This is not a
malfunction.
● The power switch mode is memorized by the vehicle. When the 12- volt bat-
tery is reconnected, the system will return to the mode it was in before the
12-volt battery was discharged. Before disconnecting the 12-volt battery,
turn the power switch off.
If the power switch was in ACCESSORY or ON mode before the 12-volt bat-
tery was discharged, the audio system and/or air conditioning system may
operate when the 12-volt battery is reconnected.
■ When the 12-volt battery is removed or discharged
● Information stored in the ECU is cleared. When the 12-volt batt ery is
depleted, have the vehicle inspected at your Toyota dealer.
● Some systems may require initialization. ( P. 565)
■ When removing the 12-vo lt battery terminals
When the 12-volt battery terminals are removed, the information stored in the
ECU is cleared. Before removing the 12-volt battery terminals, contact your
Toyota dealer.
■ Charging the 12-volt battery
The electricity stored in the 12-volt battery will discharge gr adually even when
the vehicle is not in use, due to natural discharge and the dra ining effects of
certain electrical appliances. If the vehicle is left for a lon g time, the 12-volt
battery may discharge, and the hybrid system may be unable to s tart. (The
12-volt battery recharges automatically while the hybrid system is operating.)

5278-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U
WARNING
■When removing the 12-vo lt battery terminals
Always remove the negative (-) terminal first. If the positive (+) terminal con-
tacts any metal in the surrounding area when the positive (+) terminal is
removed, a spark may occur, leading to a fire in addition to el ectrical shocks
and death or serious injury.
■ Avoiding 12-volt batte ry fires or explosions
Observe the following precautions to prevent accidentally ignit ing the flam-
mable gas that may be emitted from the 12-volt 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 in tended 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 in to contact
with each other.
● Do not smoke, use matches, cigarette lighters or allow open fla me near
the 12-volt battery.
■ After recharging the 12-volt battery
Have the 12-volt battery inspected at your Toyota dealer as soo n as possi-
ble.
If the 12-volt battery is deteriorating, continued use may caus e the 12-volt
battery to emit a malodorous gas, which may be detrimental to the health of
passengers.

5419-1. Specifications
9
Vehicle specifications
PRIUS c_U
Ignition system
Spark plug
Make
GapDENSO FK16R-A8
0.03 in. (0.8 mm)
NOTICE
■
Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark pl ug gap.
Electrical system
12-volt battery
Open voltage at
68 F (20 C): 12.0 V or higher
If the voltage is lower than the standard value,
charge the battery.
(Voltage checked 20 minutes after the hybrid sys-
tem and all the lights are turned off)
Charging rates
Quick charge
Slow charge 15 A max.
5 A max.

5449-1. Specifications
PRIUS c_U
*: If equipped
Light bulbs
Light bulbsBulb No.WTy p e
ExteriorFront turn signal lights/
parking lights

28/8 B
License plate lights 5A
Back-up lights 16 A
Rear turn signal lights 21 B
InteriorInterior lights/personal
lights

5A
Luggage compartment
light
* 5A
A: Wedge base bulbs (clear) B: Wedge base bulbs (amber)