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Foreword This guide was developed to educate and assist dismantlers in the safe handling of the Lexus GS450h gasoline-electric hybrid vehicle. GS450h dismantling procedures are similar to other Lexus vehicles with the exception of the high voltage electrical system. It is important to recognize and understand the high voltage electrical system features and specifications of the Lexus GS450h, as they may not be familiar to dismantlers.
About the GS450h The GS450h sedan joins the RX400h as a hybrid model for Lexus. Hybrid Synergy Drive means that the vehicle contains a gasoline engine and an electric motor for power. The two hybrid power sources are stored on board the vehicle: 1.
GS450h Identification In appearance, the 2007 GS450h is nearly identical to the conventional, non-hybrid Lexus GS430 / 300. The GS450h is a 4-door sedan. Exterior, interior, and engine compartment illustrations are provided to assist in identification. The alphanumeric 17 character Vehicle Identification Number (VIN) is provided in the front windshield cowl, driver door pillar, and engine compartment.
GS450h logo on the trunk. HYBRID logos on the rear door moulding. Gasoline fuel filler door located on left side quarter panel. Lexus logo on the radiator grille. GS450 h Exterior Rear and Passenger Side View Exterior Driver Side View...
GS450h Identification (Continued) Interior Instrument cluster (speedometer, fuel gauge, warning lights) located in the dash behind the steering wheel, is different than the one on the conventional, non-hybrid GS430/300. In place of a tachometer, a power meter showing KW output is used. Interior View Instrument Cluster View...
Engine Compartment 3.5liter aluminum alloy gasoline engine. Engine assembly with logo on the cover. Orange colored high voltage power cables. HYBRID SYNERGY DRIVE Logo on Engine cover Engine Compartment Power Cables...
Hybrid Component Locations & Descriptions Component Location Description 12 Volt Trunk A lead-acid battery that supplies power to the low voltage devices. Auxiliary Battery Hybrid Trunk Area, Mounted to 288 Volt Nickel Metal Hydride (NiMH) battery pack consisting of 40 low Vehicle (HV) Cross Member and voltage (7.2 Volt) modules connected in series.
Hybrid Synergy Drive Operation Once the READY indicator is illuminated in the instrument cluster, the vehicle may be driven. However, the gasoline engine does not idle like a typical automobile and will start and stop automatically. It is important to recognize and understand the READY indicator provided in the instrument cluster.
Hybrid Vehicle (HV) Battery Pack and Auxiliary Battery The GS450h contains a high voltage; Hybrid Vehicle (HV) battery pack that contains sealed Nickel Metal Hydride (NiMH) battery modules. HV Battery Pack • The HV battery pack is enclosed in a metal case and is securely mounted in the trunk area behind the rear seat.
HV Battery Pack Recycling • The HV battery pack is recyclable. Contact your Lexus Distributor as mentioned on HV battery Caution Label (see the page 29) or the nearest Lexus dealer. Auxiliary Battery • The GS450h also contains a lead-acid 12 Volt battery. This 12 Volt auxiliary battery powers the vehicle electrical system similar to a conventional vehicle.
High Voltage Safety The HV battery pack powers the high-voltage electrical system with DC electricity. Positive and negative orange colored high voltage power cables are routed from the battery pack, under the vehicle floor pan, routed along the passenger side propeller shaft and transmission tunnel to the inverter/converter.
Service Plug • The high-voltage circuit is cut by removing service plug (See page 15). High Voltage Safety System – Vehicle Shut Off (READY off) High Voltage Safety System – Vehicle On and Operational (READY on)
Precaution to be observed when dismantling the vehicle 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 opening any orange high voltage power cable or high voltage component.
Spillage The GS450h contains the same common automotive fluids used in other non-hybrid Lexus vehicles, with the exception of NiMH electrolyte used in the HV battery pack. The NiMH battery electrolyte is a caustic alkaline (pH 13.5) that is damaging to human tissues. The electrolyte, however, is absorbed in the cell plates and will not normally spill or leak out even if a battery module is cracked.
Dismantling a vehicle 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 opening any orange high voltage power cable or any high voltage component.
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3. Carry the removed service plug in your pocket to prevent other staff from reinstalling it while you are dismantling the vehicle. 4. Make other staff aware that a high-voltage system is being dismantled by using the following sign: CAUTION: HIGH VOLTAGE. DO NOT TOUCH DURING OPERATION (see page 17).
Removal of HV battery HV battery removal WARNING: ・ Be sure to wear insulated gloves when handling high-voltage parts. ・ Even if the vehicle is shut off and the relay is off, be sure to remove the service plug grip before performing any steps. ・...
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3. Remove the luggage floor mat, tool box, luggage compartment front trim cover, and luggage compartment inner cover RH. ① Remove the floor mat, tool box and service hole cover. ② Detach the hook. ③ Remove the rope hook, bolts and hooks. ④...
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5. Disconnect the frame wire. Remove the nuts and 2 clamps, and disconnect the frame wire (battery positive cable). d) Remove the nut and clamp, and disconnect the frame wire (AMD cable). Using the service plug grip, release the interlock button. Remove the 3 nuts and battery cover.
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6. Remove the auxiliary battery. Remove the nut, bolt, and battery clamp. b) Remove the auxiliary battery. 7. Remove the 3 bolts and battery carrier. 8. Remove the 2 clips and No. 2 HV battery exhaust duct. 9. Remove the clips, connector clamp, and No.
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10. Remove the 2 clips and No. 2 HV battery intake duct. 11. Remove the battery cooling blower assembly. Remove the 2 nuts and battery connector. b) Separate the No. 3 HV battery intake duct from the No. 4 HV battery intake duct.
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12. Remove the 6 bolts, 4 nuts, and 2 LH Side: battery carrier bracket. RH Side: 13. Remove the seat back assembly. ① Remove the seat cushion assembly. ② Remove the headrest assemblies LH, center, and RH. ③ Remove the 4 bolts. ④...
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14. Remove the No. 1 room partition pad as shown in the illustration. 15. Remove the upper back panel corner plate RH and upper roof side inner cover. ① Release the 6 claws and remove the upper back panel corner plate RH.
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Disconnect the battery pack wire. d) Prepare a piece of cardboard of 780 mm (30.71 in.) x 700 mm (27.56 in.) or larger. Using an extension bar (1000 mm) to hold up the HV battery, insert the Insert cardboard until it cannot be inserted and farther.
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80º. Cardboard 18. The HV battery pack is recyclable. Contact your Lexus distributor which is found on the HV Battery Caution Label or contact the nearest Lexus Dealer. (See the next page). Caution: After removing the HV battery, do not connect the service plug to the HV battery.
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HV Battery Caution Label For U.S.A. For CANADA...
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