Transcript Hybrid Vehicle Service Plug Overview

Hybrid Vehicles:
High Voltage Circuit
Disconnect Overview
Special Thanks to Mr. Tom Melito of Heyward Allen Toyota in
Athens, Ga for his help in
preparing this lesson written by Whitney Kizer.
Whitney Kizer
and
Dr. Frank B. Flanders
Georgia CTAE Resource
Network Curriculum Office
July 2008
CAUTION!!!
These procedures are for
GENERAL KNOWLEDGE
ONLY! The following steps and
procedures are only to be performed
by qualified technicians.
High Voltage Circuit…WHAT??
• The high voltage circuit
disconnect or SERVICE
PLUG on a hybrid
vehicle connects the large
battery to the rest of the
car. Without the service
plug the car could not
run.
• Service plugs are small,
plastic pieces the fit into
the side of the battery in a
hybrid.
Service Plug
The Service Plug Does What?
• The service plug connects
all the electricity within a
hybrid.
• When you remove the
service plug from the
main battery it stops the
flow of electricity through
the car.
• The service plug must be
removed BEFORE any
electrical service can be
done on the car.
Service plug
Main LARGE battery.
Location of the Hybrid Vehicle
Service Plug
• The hybrid vehicle service
plug is generally located
underneath/behind the
BACK SEAT of the car.
• To complete electrical
service on a hybrid
vehicle the backseat must
be removed to get to the
service plug.
Use Caution When Servicing
Hybrid Batteries and Electrical
Systems
• High-voltage wire
harness connectors are
colored ORANGE and
also are usually
accompanied by “High
Voltage” caution labels.
• Technicians have to be
careful to follow special
safety precautions when
dealing with hybrid
inspections and servicing.
Electrical
circuitry
within a
hybrid
engine.
Safety Precautions Continued
• Technicians should wear
insulated gloves and
remove the service plug
to prevent
ELECTROCUTION.
• Technicians should carry
the service plug in your
pocket to prevent other
technicians reinstalling
the service plug while
work is being done on the
hybrid vehicle.
Servicing Safety Continued
• After removing the service
plug, wait 5 minutes prior to
beginning work to discharge
the high-voltage condenser
inside the inverter.
• Use “CAUTION: HIGH
VOLTAGE. DO NOT
TOUCH DURING
OPERATION” signs to
notify other technicians of
service being conducted on
the hybrid vehicle.
Gasoline Engine
Electric Motor
General Safety Procedures
• Before wearing insulated
gloves, check to make
sure they are not cracked
or have holes or are
damaged in any other
way.
• Do not carry metal
objects when servicing
the vehicle. Dropping
these items could cause a
SHORT CIRCUIT
within the vehicle.
Let’s Review…
• The high-voltage service
plug helps CONNECT
the electrical components
of a hybrid vehicle.
• The safety plug is a
component of the
BATTERY.
• SAFETY is of the utmost
importance when
servicing a hybrid vehicle.
• INSULATED GLOVES
should be used to protect
the technician from being
ELECTROCUTED.
• Hybrid electrical
components are easily
distinguished from other
wiring because they have
ORANGE WIRES.
That, That, That, That’s All Folks!!!