Lexus LS 600hL 2007, Emergency Response Manual

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46 Volt Electric Power Steering System
46 VOLT SYSTEM
The LS 600hL is equipped with a 46 Volt electrical
system that powers the Electric Power Steering
(EPS) assist motor in the engine compartment and
the optional Active Stabiliser Suspension System
motors for the front and rear stabiliser bars.
• 46 Volt electrical system wires are bundled in
dull yellow sheathing for identification.
• The 46 Volt electrical system does not contain
a storage battery. It is powered by converting
high voltage battery power. The wires are
routed underneath the vehicle from the HV
battery pack DC-DC converter.
• If the HV battery pack malfunctions, backup
power is provided to the EPS motor by
boosting the 12 Volt electrical system.
NOTE:
46 Volts has a higher arc potential than 12 Volts.
– 10 –
Electric Power
Steering ECU
Assist Motor
Optional 46 Volt Active Stabiliser
Suspension System
Front Active
Stabiliser
Control ECU
Front Active
Stabiliser
Motor
Rear Active
Stabiliser Control
ECU
Rear Active
Stabiliser Motor