Hybrid Vehicle Safing Procedure for NiMh Battery
Quick Training Guide QT013A
Before servicing the high voltage system of hybrid vehicles, a safing procedure must be performed.
This Quick Reference Guide describes the safing procedures for most Toyota hybrid models.
Prepared only for technicians that are Toyota Hybrid System certified
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©Toyota Motor Sales, U.S.A., Inc., May 31, 2013
Hybrid Vehicle Safing Procedure for NiMh Battery
Quick Training Guide QT013A
Hybrid Vehicle Precautions
Safing Procedure for All Hybrid
Vehicle Models
Click the tabs at the top to view each section
CAUTION
CAUTION
Hybrid system circuits can operate with up to 650 volts. These high
voltages are dangerous and can cause severe personal injuries, burns,
electrical shock and even death if proper safety precautions are not
followed. Always refer to the Repair Manual for vehicle-specific details.
The electrolyte in nickel metal hydride (NiMH) batteries in hybrid
vehicles is a strong alkali solution that includes potassium
hydroxide, which is damaging to human tissues. To avoid injury
from coming in contact with the electrolyte, wear proper personal
protective equipment (PPE). Refer to the RM, FRM, ERG or other
source for chemical hazard PPE.
Notice: This guide does not certify you to work on hybrid vehicle
high-voltage systems. You must complete Course 071 – Toyota Hybrid
Systems (for service technicians), or Course 602 – Advanced Hybrid
Systems (for collision repair technicians) to safely begin working on
Toyota hybrid systems.
Until you complete Course 071 or Course 602:
•
Never touch, disassemble, remove or replace the high-voltage parts,
cables and their connectors. (High-voltage parts and cables are
colored orange or have high-voltage warning labels.)
•
Vehicle-specific Safing Procedures
Do not try to access the service plug.
Failure to comply with these warnings can cause severe burns or electric
shock that may result in serious injury or death.
Check DTCs before beginning hybrid vehicle service.
Insulation malfunctions can cause high voltage to be present in
unexpected locations. Always check DTCs and repair any isolation
faults before proceeding with vehicle service.
DTC
INF Code
Indicates
P0AA6*
526, 611, 612, 613, 614
HV Battery Voltage System Isolation
Fault
P0A1D
721, 722, 723, 787, 818
Monitor CPU Malfunction
(ECU internal error)
P0AA7
727
Malfunction in insulation monitoring
circuit in HV Battery Smart Unit
P0A1F
129
Malfunction in HV battery voltage
circuit in the HV Battery Smart Unit
*In 2001-2003 Prius, P3009 was used in place of P0AA6.
Use the proper personal protective equipment (PPE).
The following personal protective equipment (PPE) is mandatory for working
on the high-voltage system in Toyota hybrid vehicles:
••
•
Safety glasses (ANSI certified) with side shields
Class 0 electrical insulating gloves meeting ASTM
standard specifications (up to 1000 volts)
Gloves that have been in-service for six months
must either:
•
Be sent out for electrical testing or
•
Disposed of and replaced with new gloves
Refer to the RM for care and handling of gloves and in-use check procedures.
Take responsibility for managing safety.
The Certified Hybrid Technician is responsible for managing safety while
inspecting or repairing any high-voltage components.
•
Confirm that the work area is dry and the areas around the hybrid
components (HV battery, inverter) are dry
•
Create and maintain a safe zone around the hybrid vehicle as appropriate.
•
Use the “CAUTION: HIGH VOLTAGE. DO NOT TOUCH” sign to notify
other technicians that the high-voltage system is being inspected and/or
repaired. This sign can be found in most
hybrid Repair Manuals under General >
Introduction > Repair Instruction >
Precaution. Click here for a copy.
©Toyota Motor Sales, U.S.A., Inc., May 31, 2013
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Hybrid Vehicle Safing Procedure for NiMh Battery
Quick Training Guide QT013A
Hybrid Vehicle Precautions
Safing Procedure for All Hybrid
Vehicle Models
Vehicle-specific Safing Procedures
Click the tabs at the top to view each section
The following procedure applies to all Toyota hybrid vehicles except Prius PHV. It does NOT apply to RAV4 EV or Scion iQ EV.
Before servicing the HV system:
Even with the service plug removed, the HV battery still has highvoltage components inside. Note that using non-insulated tools can
cause a short circuit between high-voltage components resulting in
an electrical arc and burns. Always follow the safety precautions
described in the Repair Manual when working around the HV battery.
1. Turn the power switch OFF, and remove the key from the interior
detection area for the entry and start system.
•
When the vehicle is in READY mode, the engine may not be running –
but it can start at any time, without warning
•
Secure the smart key at least 10 feet away from the vehicle to provide
additional safety
2. Disconnect the cable from the auxiliary battery negative terminal.
3. Check the insulated gloves.
•
Before use, check the insulated gloves for cracks, tears and other
types of damage by performing the following procedure:
5. Wait for 10 minutes or more to discharge the high-voltage capacitor
inside the inverter assembly.
•
The capacitor stores and releases high-voltage electricity supplied
by the HV battery and the motor generators
•
The capacitor must be allowed to fully discharge before servicing
the HV system
6. Check the voltage at the designated inspection points in the
inverter (0V check).
1
Place the glove on its side
2
Roll the opening up 2 or 3 times, trapping as much air as possible
within the glove
3
Fold the opening in half to close it
4
Confirm that there are no air leaks by listening for escaping air or
holding the gloves against your cheek to feel for escaping air
4. Wearing insulated gloves, remove the service plug grip.
•
Keep the removed service plug in your pocket (or other secure location)
to prevent other technicians from accidentally reconnecting it while you
are working on the high-voltage components
Refer to the Repair Manual for the vehicle you’re servicing for the
specific location of and procedure for removing the Service Plug.
•
Before using the voltmeter to measure voltage at the inverter
terminals, test the voltmeter by measuring the voltage of the
auxiliary battery
•
Be sure the meter is set to measure the appropriate voltage range
as specified in the Repair Manual
Refer to the Repair Manual for the specific test points for voltage
measurements for the vehicle you’re servicing.
7. Insulate the disconnected high-voltage connectors with insulated
vinyl tape.
For Additional Safety Information
Additional safety information for first responders and for dismantlers is
available free at http://www.techinfo.toyota.com. Go to the bottom of the
page and click on the “Emergency Response and Hybrid Information”
link. There you will find:
• Emergency Response Guides
• Hybrid Emergency Responder Training
• Hybrid Dismantling Manuals
©Toyota Motor Sales, U.S.A., Inc., May 31, 2013
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Hybrid Vehicle Safing Procedure for NiMh Battery
Quick Training Guide QT013A
Hybrid Vehicle Precautions
Avalon 2013+
Camry 2012+
Camry
2007-2011
Highlander
2006-2010
Safing Procedure for All Hybrid
Vehicle Models
Highlander
2011+
Prius
2001-2003
Prius
2004-2009
Vehicle-specific Safing Procedures
Prius
2010+
Prius V
2012+
Prius C
2012+
Click the tabs at the top to view each section
Avalon, 2013+ and Camry, 2012+
Step 4:
Step 6:
Remove the luggage trim service hole cover,
luggage compartment floor mat, luggage
compartment front trim cover, and No. 8
hybrid vehicle battery shield panel.
Service Plug Grip
After 10 minutes,
remove the 2 bolts
and connector cover.*
x2
No. 8 Hybrid Vehicle
Battery Shield Panel
Wearing insulated gloves,
slide the lever to the right.
Pull the lever toward you
and remove the plug.
Using a measuring range of
750 V DC or more, measure the
voltage between the terminals.*
Std. Voltage: 0V
*Wear insulated gloves.
©Toyota Motor Sales, U.S.A., Inc., May 31, 2013
4 of 13
Hybrid Vehicle Safing Procedure for NiMh Battery
Quick Training Guide QT013A
Safing Procedure for All Hybrid
Vehicle Models
Hybrid Vehicle Precautions
Avalon 2013+
Camry 2012+
Camry
2007-2011
Highlander
2006-2010
Highlander
2011+
Prius
2001-2003
Prius
2004-2009
Vehicle-specific Safing Procedures
Prius
2010+
Prius V
2012+
Prius C
2012+
Click the tabs at the top to view each section
Camry, 2007-2011
Step 4:
Service Hole Cover
Step 6:
Slide the latch upward and
open the service hole cover.
After 10 minutes,
remove the 2 bolts
and connector cover.*
Then pull to remove.
Using a measuring range of
750 V DC or more, measure the
voltage between the terminals.*
Std. Voltage: 0V
Wearing insulated
gloves, slide the lever
upward and pull down.
*Wear insulated gloves.
©Toyota Motor Sales, U.S.A., Inc., May 31, 2013
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Hybrid Vehicle Safing Procedure for NiMh Battery
Quick Training Guide QT013A
Hybrid Vehicle Precautions
Avalon 2013+
Camry 2012+
Camry
2007-2011
Highlander
2006-2010
Safing Procedure for All Hybrid
Vehicle Models
Highlander
2011+
Prius
2001-2003
Prius
2004-2009
Vehicle-specific Safing Procedures
Prius
2010+
Prius V
2012+
Prius C
2012+
Click the tabs at the top to view each section
Highlander, 2006-2010
Step 4:
Step 6:
After 10 minutes, remove the
inverter cover.*
Using a measuring range of
750 V DC or more, measure the
voltage between the terminals.*
Std. Voltage: 0V
Wearing insulated gloves, pull
the lever (do not slide) and
remove the service plug grip.
Remove the 2 clips and rear
door scuff plate LH.
Remove the 2 clips and
reclining hinge cover.
*Wear insulated gloves.
©Toyota Motor Sales, U.S.A., Inc., May 31, 2013
6 of 13
Hybrid Vehicle Safing Procedure for NiMh Battery
Quick Training Guide QT013A
Safing Procedure for All Hybrid
Vehicle Models
Hybrid Vehicle Precautions
Avalon 2013+
Camry 2012+
Camry
2007-2011
Highlander
2006-2010
Highlander
2011+
Prius
2001-2003
Prius
2004-2009
Vehicle-specific Safing Procedures
Prius
2010+
Prius V
2012+
Prius C
2012+
Click the tabs at the top to view each section
Highlander, 2011+
Step 4:
Remove the clips and rear
door scuff plate LH.
Step 6:
After 10 minutes, remove
the 11 bolts and the
inverter terminal cover.*
Rear Door Scuff Plate LH
Rear Door LH
Remove the 2 clips and
the reclining hinge cover.
Using a measuring range of
750 V DC or more, measure the
voltage between the terminals.*
Wearing insulated gloves, pull
the lever (do not slide) and
remove the service plug grip.
Std. Voltage: 0V
Reclining Hinge Cover
*Wear insulated gloves.
©Toyota Motor Sales, U.S.A., Inc., May 31, 2013
7 of 13
Hybrid Vehicle Safing Procedure for NiMh Battery
Quick Training Guide QT013A
Hybrid Vehicle Precautions
Avalon 2013+
Camry 2012+
Camry
2007-2011
Highlander
2006-2010
Safing Procedure for All Hybrid
Vehicle Models
Highlander
2011+
Prius
2001-2003
Vehicle-specific Safing Procedures
Prius
2004-2009
Prius
2010+
Prius V
2012+
Prius C
2012+
Click the tabs at the top to view each section
Prius, 2001-2003
Step 4:
After 5 minutes:
Step 6:
A. Use a torx socket
wrench (T30) to remove
the 4 screws and
inverter terminal cover.*
Service Plug
B. Using a torx socket
wrench (T40), remove
the 2 screws, circuit
breaker sensor and
connector cover.*
Terminals U, V, W
Hint
Slide the connector
cover to disconnect
the circuit breaker
sensor connector.
Using a voltmeter,
measure the voltage
between terminals of 3
phases (U−V, V−W, U−W)
and each terminal and
body ground to verify
them to be approx. 0V.*
Wearing insulated gloves,
rotate the handle open,
then pull to remove.
Service Plug
After removing the service plug,
cover the plug connector using
rubber or vinyl tape.
Terminals U, V, W
*Wear insulated gloves.
©Toyota Motor Sales, U.S.A., Inc., May 31, 2013
8 of 13
Hybrid Vehicle Safing Procedure for NiMh Battery
Quick Training Guide QT013A
Safing Procedure for All Hybrid
Vehicle Models
Hybrid Vehicle Precautions
Avalon 2013+
Camry 2012+
Camry
2007-2011
Highlander
2006-2010
Highlander
2011+
Prius
2001-2003
Vehicle-specific Safing Procedures
Prius
2004-2009
Prius
2010+
Prius V
2012+
Prius C
2012+
Click the tabs at the top to view each section
Prius, 2004-2009
Step 4:
Remove the rear floor board
No. 2, the rear deck floor box,
and the rear floor board No. 3.
Step 6:
Lever
After 5 minutes, remove
the inverter cover.*
Using a measuring range
of 400 V DC or more,
measure the voltage
between the terminals.*
Wearing insulated gloves, slide the
lever up, then pull it down to the left.
Std. Voltage: 0V
Terminals U, V, W
Pull to the left to remove.
Using the voltmeter,
measure the voltage at
the terminals of both
three phase connectors.
Measure both connectors
between U − V, V − W,
and U − W.*
Glove
Std. Voltage: 0V
Service Plug
Terminals U, V, W
*Wear insulated gloves.
©Toyota Motor Sales, U.S.A., Inc., May 31, 2013
9 of 13
Hybrid Vehicle Safing Procedure for NiMh Battery
Quick Training Guide QT013A
Hybrid Vehicle Precautions
Avalon 2013+
Camry 2012+
Camry
2007-2011
Highlander
2006-2010
Safing Procedure for All Hybrid
Vehicle Models
Highlander
2011+
Prius
2001-2003
Vehicle-specific Safing Procedures
Prius
2004-2009
Prius
2010+
Prius V
2012+
Prius C
2012+
Click the tabs at the top to view each section
Prius, 2010+
Step 4:
Step 6:
Remove the rear floor board
No. 2, the rear deck floor box,
and the rear floor board No. 3.
After 10 minutes, remove
the 9 bolts and the
inverter terminal cover.*
Service Plug Grip
Wearing insulated gloves,
slide the lever to the left.
Pull the lever toward you
and remove the plug.
Using a measuring range
of 750 V DC or more,
measure the voltage
between the terminals.*
Std. Voltage: 0 V
*Wear insulated gloves.
©Toyota Motor Sales, U.S.A., Inc., May 31, 2013
10 of 13
Hybrid Vehicle Safing Procedure for NiMh Battery
Quick Training Guide QT013A
Hybrid Vehicle Precautions
Avalon 2013+
Camry 2012+
Camry
2007-2011
Highlander
2006-2010
Safing Procedure for All Hybrid
Vehicle Models
Highlander
2011+
Prius
2001-2003
Vehicle-specific Safing Procedures
Prius
2004-2009
Prius
2010+
Prius V
2012+
Prius C
2012+
Click the tabs at the top to view each section
Prius V, 2012+
Step 4:
Step 6:
Remove the deck board
assembly, No. 1 and No. 2
deck board, rear deck floor
box, and deck floor box RH.
After 10 minutes, remove
the 9 bolts and the
inverter terminal cover.*
Service Plug Grip
Wearing insulated gloves,
slide the lever to the left.
Pull the lever toward you
and remove the plug.
Using a measuring range
of 750 V DC or more,
measure the voltage
between the terminals.*
Std. Voltage: 0 V
*Wear insulated gloves.
©Toyota Motor Sales, U.S.A., Inc., May 31, 2013
11 of 13
Hybrid Vehicle Safing Procedure for NiMh Battery
Quick Training Guide QT013A
Safing Procedure for All Hybrid
Vehicle Models
Hybrid Vehicle Precautions
Avalon 2013+
Camry 2012+
Camry
2007-2011
Highlander
2006-2010
Highlander
2011+
Prius
2001-2003
Vehicle-specific Safing Procedures
Prius
2004-2009
Prius
2010+
Prius V
2012+
Prius C
2012+
Click the tabs at the top to view each section
Prius C, 2012+
Step 4:
Rear Seat
Step 6:
Remove the front floor
cover RH, front floor
cover LH, and front
center floor cover.
Service Plug Grip
After 10 minutes,
remove the 7 bolts and
the inverter cover.*
x2
x3
Using a measuring range
of 750 V DC or more,
measure the voltage
between the terminals.*
x2
Std. Voltage: 0 V
Wearing insulated gloves,
slide the lever downward.
Pull the lever toward you
and remove the plug.
*Wear insulated gloves.
©Toyota Motor Sales, U.S.A., Inc., May 31, 2013
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Hybrid Vehicle Safing Procedure for NiMh Battery
Quick Training Guide QT013A
Hybrid Vehicle Precautions
Safing Procedure for All Hybrid
Vehicle Models
Caution Sign
Vehicle-specific Safing Procedures
Click the tabs at the top to view each section
Copy this sign, and after folding it, put it on the roof of the vehicle in service.
©Toyota Motor Sales, U.S.A., Inc., May 31, 2013
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