Overhaul - Lexus GS450h Manual

Emergency Response (Continued)

Overhaul

During overhaul, immobilize and disable the vehicle if not already done.
Refer to illustrations on page 19, 20 and 21. The HV battery cover should
never be breached or removed under any circumstances including fire. Doing
so may result in severe electrical burns, shock, or electrocution.
•
Immobilize Vehicle
Chock wheels and set the parking brake.
Move the shift lever to the Park position.
NOTE:
The GS450h utilizes a push/pull parking brake switch that
electromechanically sets/releases the rear parking brakes.
– To set/release, push/pull the parking brake switch located on the
dash to the right side of steering column (refer to illustration on
page 19).
– If the AUTO button is set and illuminated, the parking brake will
automatically set when the vehicle is shifted to the Park position.
– To verify that the parking brake is set, confirm that the PARK
light illuminates on the instrument cluster (refer to illustration on
page 19).
The PARK light will turn off after approximately 15 seconds.
•
Disable Vehicle
Performing either of the following two procedures will shut the
vehicle off and disable the HV battery pack, SRS, and gasoline fuel
pump.
Procedure #1
1. Confirm the status of the READY indicator in the instrument
cluster.
2. If the READY indicator is illuminated, the vehicle is on and
operational. Shut off the vehicle by pushing the power button
once.
3.
The vehicle is already shut off if the instrument cluster lights and
the READY indicator are not illuminated. Do not push the
power button because the vehicle may start.
4. If the smart key is easily accessible, keep it at least 16 feet (5
meters) away from the vehicle.
5. If the smart key cannot be found, disconnect the 12 Volt
auxiliary battery in the trunk to prevent accidental restarting of
the vehicle.
Procedure #2
(Alternate if power button is inaccessible)
1. Open the hood and remove the fuse box cover.
2. Remove the IG2 MAIN fuse (20 A yellow colored) in the
engine compartment fuse box as illustrated on page 21. If the
correct fuse cannot be recognized, pull all fuses in the fuse box.
3. Disconnect the 12 Volt auxiliary battery in the trunk.
NOTE:
Before disconnecting the 12 Volt auxiliary battery, if necessary,
reposition the power tilt and telescopic steering wheel, power seats,
lower the windows, unlock the doors, and open the fuel filler door as
required. The lock of the fuel filler door is linked with the door lock.
A manual fuel filler door release is located inside the driver side
trunk (refer to illustrations in the Roadside Assistance section on
page 30). Once the 12 Volt auxiliary battery is disconnected, power
controls will not operate.
WARNING:
•
The high voltage system may remain powered for up to 10 minutes
after the vehicle is shut off or disabled. To prevent serious injury
or death from severe burns or electric shock, avoid touching,
cutting, or breaching any orange high voltage power cable or high
voltage component.
•
The SRS may remain powered for up to 90 seconds after the vehicle
is shut off or disabled. To prevent serious injury or death from
unintentional SRS deployment, avoid breaching the SRS
components.
•
If none of the disabling procedures can be performed, proceed with
caution as there is no assurance that the high voltage electrical
system, SRS, or fuel pump are disabled
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