warning Lexus GS450h 2017 Owner's Manual

4667-2. Steps to take in an emergency
GS450h_300h_OM_OM30F92E_(EE)
If a warning message is displayed
Master warning light
The master warning light also comes on or flashes in order to indicate that a message is currently being displayed on the multi-information display.
Multi-information display
If any of the warning light comes on again after the following actions have been
performed, contact any authorized Lexus retailer or Lexus authorized repairer,
or any reliable repairer.
If a warning is shown on the multi-information display, stay calm and perform
the following actions:
Except F SPORT modelsF SPORT models
Warning message and warning buzzer list
1
2
Warning messageDetails/Actions
(If equipped)
Indicates that there is a high possibility of a frontal colli-
sion, or that the pre-crash braking function is operating
At the same time, will appear on the head-
up display.
A buzzer also sounds.  Avoid the collision by decelerating using the brakes or taking other evasive actions.

4677-2. Steps to take in an emergency
7
When trouble arises
GS450h_300h_OM_OM30F92E_(EE)
(If equipped)
Indicates that your vehicle is nearing the vehicle ahead
(in vehicle-to-vehicle distance control mode)
At the same time, will appear on the head-up dis-
play (the image flashes). A buzzer also sounds.
 Slow the vehicle by applying the brakes.
(If equipped)
Indicates that the vehicle has deviated from the lane (while the LKA [Lane-Keeping Assist] system is operat-ing)
The lane line on the side the vehicle has deviated from flashes in amber.
At the same time, will appear on the head-
up display (the image flashes).
A buzzer also sounds.
 Check around the vehicle and back to inside of the lane lines.
Indicates a malfunctio n in the brake system A buzzer also sounds.
 Have the vehicle inspected by any authorized Lexus retailer or Lexus authorized repairer, or any reliable
repairer. Continuing to drive the vehicle may be dangerous.
Warning messageDetails/Actions
(Flashes)

4687-2. Steps to take in an emergency
GS450h_300h_OM_OM30F92E_(EE)
Indicates a malfunction in the gasoline engine or that the
shift lever is in N for a long period of time A buzzer also sounds. Release the accelerator pedal and change the shift
position to D, S or R.
Indicates that the driver’s door was opened with the shift position in any position other than PA buzzer also sounds.
 Shift the shift position to P.
Indicates a malfunction in the hybrid system A buzzer also sounds.
 Immediately stop the vehicle in a safe place and contact any authorized Lexus retailer or Lexusauthorized repairer, or any reliable repairer.
Indicates that hood or one or more of the doors or trunkare not fully closed
The system also indicates which hood or doors or trunk are not fully closed.If the vehicle reaches a speed of 5 km/h (3 mph),
flashes and a buzzer sounds to indicate that
the hood or door(s) or trunk are not yet fully closed.
 Make sure that hood or all doors or trunk are closed.
Warning messageDetails/Actions
(Flashes)
(Flashes)

4697-2. Steps to take in an emergency
7
When trouble arises
GS450h_300h_OM_OM30F92E_(EE)
(If equipped)
Indicates a malfunction in the Lexus parking assist All assist-sensors flash.
A buzzer also sounds.  Have the vehicle inspected by any authorized Lexus retailer or Lexus authorized repairer, or any reliable
repairer.
(If equipped)
Indicates that Lexus parking a ssist-sensor is dirty or cov- ered with ice
A buzzer also sounds.  Clean the sensor.
Indicates an attempt was made to release the parking
brake with a door open or the front passenger’s seat belt unfastenedA buzzer also sounds.
 Close all doors and fasten the front passenger’s seat belt before releasing the parking brake.
Warning messageDetails/Actions
(Flashes)

4707-2. Steps to take in an emergency
GS450h_300h_OM_OM30F92E_(EE)
Indicates that the driver’s door was opened with the shift
position in any position other than P A buzzer also sounds. Shift the shift position to P.
Indicates that the accelerator pedal is depressed while the shift lever is in N
A buzzer also sounds.  Release the accelerator pedal and shift the shift position to D, S or R.
Indicates that the accelerator pedal is depressed whilethe shift lever is in NA buzzer also sounds.
 Release the accelerator pedal and shift the shift position to D, S or R.
Warning messageDetails/Actions
(Flashes)
(Flashes)
(Flashes)

4717-2. Steps to take in an emergency
7
When trouble arises
GS450h_300h_OM_OM30F92E_(EE)
Indicates that the hybrid battery (traction battery) power has dropped because a long period of time has elapsedafter shifting the shift lever to N
A buzzer also sounds.  Restart the hybrid system when starting the vehicle.
Indicates a malfunction in the hybrid system Depending on the malfunctio n, troubleshooting meth-
ods may also be displayed. A buzzer also sounds. Immediately stop the vehicle in a safe place and
contact any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer.
Indicates that the traction battery is low
A buzzer also sounds.  When stopping the vehicle for a long period of time, shift the shift lever to P. The battery cannot be
charged with the shift lever in N.
Indicates a malfunction in the EPS (Electric Power Steer-
ing) system A buzzer also sounds. Have the vehicle inspected by any authorized Lexus
retailer or Lexus authorized repairer, or any reliable repairer.
Warning messageDetails/Actions
(Flashes)
(Flashes)

4727-2. Steps to take in an emergency
GS450h_300h_OM_OM30F92E_(EE)
Indicates that the vehicle is being driven at 5 km/h
(3 mph) or more with the parking brake still engaged. A buzzer also sounds. Release the parking brake.
Indicates that the parking brake is engaged with the shift position not in PA buzzer also sounds.
 Change the shift position to P.
Indicates a malfunction in the brake hold system A buzzer also sounds. Depress the brake pedal to turn off the brake hold
system. Have the vehicle inspected by any authorized Lexusretailer or Lexus authorized repairer, or any reliable
repairer.
Indicates that the brake hold system is turned on while on
a steep slope A buzzer also sounds. Do not use only the brake hold system on steep
slopes. Be sure to also depress the brake pedal.
Indicates a malfunction in the parking brake system
A buzzer also sounds.  Press the parking brake switch. If the warning mes- sage is still displayed, have the vehicle inspected by
any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer.
Warning messageDetails/Actions
(Flashes)
(Flashes)
(Flashes) (Flashes)

4737-2. Steps to take in an emergency
7
When trouble arises
GS450h_300h_OM_OM30F92E_(EE)
Indicates an attempt was made to release the parking brake without depressing the brake pedalA buzzer also sounds.
 Release the parking brake while depressing the brake pedal.
Indicates that the shift position was changed and Drive-Start Control was operated while depressing the accel-erator pedal
A buzzer also sounds.  Momentarily release the accelerator pedal.
Indicates an attempt was made to shift to 1st gear with the shift position in S while on a slippery surface The vehicle will not shift down from 2nd gear.
A buzzer also sounds.  Drive the vehicle in 2nd gear or higher.
(If equipped)
Indicates that the LKA (Lane-Keeping Assist) system has determined that the driver does not have their hands onthe steering wheel while the steering control function is
on  Firmly hold the steering wheel.
Warning messageDetails/Actions
(Flashes)

4747-2. Steps to take in an emergency
GS450h_300h_OM_OM30F92E_(EE)
(If equipped)
Indicates that steering control function is temporarily canceled due to the LKA (L ane-Keeping Assist) system determining that the driver does not have their hands on
the steering wheel while the steering control function is onA buzzer also sounds.
 Firmly hold the steering wheel.
Indicates that the parking brake system is overheating A buzzer also sounds.
 Do not use the parking brake until the message dis- appears.
Indicates an engine malfunction
A buzzer also sounds.  Have the vehicle inspected by any authorized Lexus retailer or Lexus authorized repairer, or any reliable
repairer.
Indicates an engine malfunction A buzzer also sounds. Have the vehicle inspected by any authorized Lexus
retailer or Lexus authorized repairer, or any reliable repairer.
Warning messageDetails/Actions

4757-2. Steps to take in an emergency
7
When trouble arises
GS450h_300h_OM_OM30F92E_(EE)
Indicates a malfunction in:
• The SRS airbag system; or • The seat belt pretensioner systemA buzzer also sounds.
 Have the vehicle inspected by any authorized Lexus retailer or Lexus authorized repairer, or any reliablerepairer.
Indicates a malfunction in:•The ABS; or• The brake assist system
A buzzer also sounds.  Immediately stop the vehicle in a safe place and contact any authorized Lexus retailer or Lexus
authorized repairer, or any reliable repairer.
Indicates that the engine coolant temperature is too high
A buzzer also sounds.  P. 535
Indicates a malfunction in the vehicle’s charging system.  Immediately stop the vehicle in a safe place and contact any authorized Lexus retailer or Lexus
authorized repairer, or any reliable repairer.
Warning messageDetails/Actions