Toyota Highlander Hybrid 2020 Owner's Manual page 487

The interior lights and
headlights are dim, or the
horn does not sound or
sounds at a low volume.
One of the following may be the
cause of the problem:
 The 12-volt battery may be
discharged. (P.491)
 The 12-volt battery terminal
connections may be loose or
corroded. (P.416)
The interior lights and
headlights do not turn on,
or the horn does not
sound.
One of the following may be the
cause of the problem:
 One or both of the 12-volt bat-
tery terminals may be discon-
nected. (P.416)
 The 12-volt battery may be
discharged. (P.491)
Contact your Toyota dealer if the
problem cannot be repaired, or if
repair procedures are unknown.
Starting the hybrid sys-
tem in an emergency
When the hybrid system does
not start, the following steps can
be used as an interim measure
to start the hybrid system if the
power switch is functioning nor-
mally.
Do not use this starting proce-
HIGHLANDER HV_U
7-2. Steps to take in an emergency
dure except in cases of emer-
gency.
1
Pull the parking brake switch
to check that the parking
brake is set. (P.224)
Parking brake indicator will come
on.
2
Shift the shift lever to P.
3
Turn the power switch to
ACC.
4
Press and hold the power
switch for about 15 seconds
while depressing the brake
pedal firmly.
Even if the hybrid system can be
started using the above steps,
the system may be malfunction-
ing. Have the vehicle inspected
by your Toyota dealer.
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