L-SB-0029-18

Rev1

August 15, 2018

Hybrid System Electrical Safety Precautions
Service
Category

General

Section

Pre-Delivery Service

Market USA

Applicability
YEAR(S)

MODEL(S)

2019

ES300H, LC500H, LS500H,
NX300H, RX450H, UX250H

ADDITIONAL INFORMATION

REVISION NOTICE
November 27, 2018 Rev1:
 Applicability has been updated to include 2019 model year UX250h vehicles.
Any previous printed versions of this bulletin should be discarded.

Introduction

This bulletin provides general high-voltage safety precautions for the hybrid system. The hybrid
system circuits operate with up to 650V. These high voltages are dangerous and can cause
personal injury, severe burns, electric shock, and death if proper safety precautions are NOT
followed. Be sure to carefully review ALL applicable Repair Manual procedures BEFORE
performing service.
As a policy, and to help ensure safety, no Lexus dealership technician is qualified to service or
repair hybrid vehicles until Lexus course L071 is successfully completed.
CAUTION
When servicing the high-voltage system on Lexus hybrid vehicles, wait AT LEAST 10 minutes
AFTER disconnecting the service plug BEFORE touching ANY of the high-voltage connectors
or terminals. Failure to do so may result in personal injury, severe burns, electric shock,
and death.

Warranty Information
OP CODE

DESCRIPTION

TIME

OFP

T1

T2

N/A

Not Applicable to Warranty

–

–

–

–

© 2018 Lexus, a division of Toyota Motor Sales, USA

Page 1 of 3

L-SB-0029-18

Rev1

August 15, 2018

Page 2 of 3

Hybrid System Electrical Safety Precautions
Required Tools & Equipment
SPECIAL SERVICE TOOLS (SST)

PART NUMBER

QTY

Electrical Insulating Gloves*

01413-00072 (Medium)
01413-00073 (Large)
01413-00074 (Extra Large)

1

* Essential SST.

CAUTION
ALWAYS inspect electrical insulating gloves BEFORE use for cracks, ruptures, tears, pinholes,
or damage. Do NOT wear if damaged. Failure to do so may result in personal injury, severe
burns, electric shock, and death.

NOTE
Additional SSTs may be ordered by calling 1-800-933-8335.

Electrical Safety Precautions
CAUTION
HYBRID HIGH-VOLTAGE SAFETY NOTICE
A Lexus gas/electric hybrid vehicle has high-voltage DC and AC systems. Both DC and AC
high-voltage are very dangerous and can cause personal injury, severe burns, electric shock,
and death.
Regular Service and Repairs (Pre-Delivery Service [PDS] and Non-High-Voltage Maintenance
and Service)
Ensure that ALL persons performing PDS or non-high-voltage maintenance and service:
1. Follow ALL caution labels attached to high-voltage parts.
2. Do NOT touch or attempt to remove or replace ANY high-voltage (orange-colored) wiring
and connectors.
3. Do NOT touch the orange service plug.
4. Read, understand, and follow the safety procedures in the PDS Manual, Repair Manual, and
ALL applicable Service Bulletins for the vehicle.

© 2018 Lexus, a division of Toyota Motor Sales, USA

L-SB-0029-18

Rev1

August 15, 2018

Page 3 of 3

Hybrid System Electrical Safety Precautions
Electrical Safety Precautions (continued)
CAUTION
HYBRID HIGH-VOLTAGE SAFETY NOTICE (continued)
High-Voltage Repairs
Ensure that ALL technicians performing repairs to high-voltage systems:
1. Complete the hybrid training course L071 provided at the Lexus Area office.
2. Read, understand, and follow the safety procedures in the Repair Manual and ALL applicable
Service Bulletins for the vehicle.
3. Use electrical insulating gloves and safety glasses whenever servicing high -voltage systems.
4. AFTER disconnecting the service plug, wait AT LEAST 10 minutes BEFORE touching ANY of
the high-voltage connectors or terminals.
5. Are responsible for managing the safety of ANY hybrid vehicle or parts they are working on.
6. Maintain a “safety zone” around their work, including using yellow caution tape and “DO NOT
TOUCH – HIGH-VOLTAGE” signs when high-voltage system repairs are to be left unattended.
In the Event the Hybrid Vehicle is Involved in an Accident
1. Do NOT touch ANY high-voltage wiring, connectors, or parts such as the inverter or the
hybrid battery assembly.
2. Do NOT touch the potassium hydroxide electrolyte that might spill or leak from the hybrid
battery as the result of an accident. If potassium hydroxide electrolyte gets on your skin or in
your eyes, neutralize it IMMEDIATELY with a saturated boric acid solution (ratio: 80 grams
boric acid to 2 liters water) or alternatively, flush repeatedly with large amounts of water.
SEEK IMMEDIATE MEDICAL ATTENTION.
3. If a vehicle fire occurs, water has been proven to be a suitable extinguishing agent.
4. See the Emergency Response Guide on Lexus TIS or Dealer Daily for more information.
If you have ANY questions, contact your District Service and Parts Manager.

Please refer to the Repair Manual for additional caution notices.

© 2018 Lexus, a division of Toyota Motor Sales, USA