HIGH VOLTAGE SAFETY
– 12 –
Electronic Power Steering
System
The GS450h is equipped with a 37-Volt AC assist
motor for the Electric Power Steering (EPS) system.
The EPS computer generates 37-Volts from the
12-Volt system. The 37-Volt wires are isolated from
the metal chassis and are routed a short distance
from the EPS computer to the EPS assist motor in
the engine compartment.
NOTE:
37-Volt AC has a higher arc potential than the
normal 12-Volt DC.
High Intensity Discharge
Headlights
Similar to conventional, non-hybrid, Lexus vehicles,
the GS450h is equipped with low beam projector
type High Intensity Discharge (HID) headlights.
The light control unit, located inside the headlight
assembly, contains a high voltage generator circuit
that momentarily boosts 12-Volts to 22-kV that is
applied to the bulb when the headlights are turned
on. Once illuminated, the voltage drops to
approximately 45-Volts.
37-Volt EPS
Projector Type HID Low Beam Headlights
WARNING:
High voltage is applied to the HID bulb socket when
the low beam headlights are turned on. To avoid
serious injury or death by electric shock do not
touch the bulb socket when the headlights are
turned on.
EPS
Computer
EPS
Assist
Motor
HID Low Beam
Headlight
7940 - Lexus A4 ERG Book 3/5/06 3:23 PM Page 12
