Overhaul

Overhaul

During overhaul, immobilize and disable the vehicle if not already done. 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 the steering column (refer to illustration).

- 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). 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 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. Keep the smart key 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.
2. Remove the fuse box cover.
3. Remove the IG2 MAIN fuse (20 A yellow colored) in the engine compartment fuse box (refer to illustration). If the correct fuse cannot be recognized, pull all fuses in the fuse box.
4. Disconnect the 12 Volt auxiliary battery under the cover in the trunk.

NOTE:
Before disconnecting the 12-Volt auxiliary battery, if necessary, reposition the power seats and tilt/telescoping steering wheel, lower the windows, unlock the doors, open the trunk and the fuel door as required. A manual fuel door release is located in the trunk (see illustration). Once the 12-Volt auxiliary battery is disconnected power controls will not operate.

WARNING:
- The high voltage system may remain powered for up to 1O 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 opening 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 he performed, proceed with caution as there is no assurance that the high voltage electrical system, SRS, or fuel pump are disabled.