February 13, 2014

L-58-0011-14

Technical Service Information Bulletin

Maintenance for HV & Auxiliary Batteries
Service
Category

General
Lexus Supports

Section

Pre-Delivery Service

Market

USA

~

AS E Certification -

Applicability
YEAR(S)

MODEL(S)

2015

CT200H , ES300H ,

ADDITIONAL INFORMATION

GS450H , LS600H ,
RX450H

Introduction
Hybrid vehicles are equipped with 2 types of batteries:
•

Hybrid Vehicle (HV) battery

•

12-volt auxiliary battery

If the vehicle is put into storage, the state of charge (SOC) of its HV battery and auxiliary battery
will gradually decrease. To prevent the auxiliary battery from becoming discharged during storage,
proper maintenance is necessary.
Please perform the following maintenance service for the HV battery and 12-volt auxiliary battery.
NOTE
• Before disconnecting the auxiliary battery, confirm the shift lever is in the "P" position and
apply the parking brake completely. The shift lever cannot be shifted from the "P" position
with the 12-volt auxiliary battery disconnected.
• If the negative (-) terminal of the auxiliary battery is reconnected, even if the power switch
is selected to the "START" mode, the hybrid system may NOT start. In this case, push the
POWER switch to select "START" again to start the hybrid system (the "READY" light is ON).
If the hybrid system still does NOT start (the "READY" light is OFF), refer to the Repair Manual.
• If vehicle is equipped with VGRS, the system must be initialized after the auxiliary battery
has been reconnected. Please refer to the applicable vehicle specific Service Bulletin
for instructions.

© 2014 Lexus, a division of Toyota Motor Sales , USA

Page 1 of 6

L-SB-0011-14

February 13, 2014

Page 2 of 6

Maintenance for HV & Auxiliary Batteries

Maintenance Items
MAINTENANCE OPERATION

CONDITION*

Fully charge the 12-volt auxiliary battery. Fast charge is NOT
recommended on the 12-volt battery in order to prevent battery
damage. (Deliver the vehicle to the customer after it is fully
charged to 12.6 V.)

Before Delivery

To Store for 30 Days or More

Just After Unloading & Every 2 Months

Disconnect the negative(-) terminal of the 12-volt auxiliary
battery to prevent the SOC of the au xiliary battery from
decreasing during storage due to parasitic current.
Keep the Hybrid System ON for 30 minutes with the transmission
in the "P" position (in order to charge the HV battery and the
auxiliary battery) .

* The cond ition also corresponds with the section titles within this Service Bulletin.

Warranty Information
OP CODE

DESCRIPTION

TIME

OFP

T1

T2

N/A

Not Applicable to Warranty

-

-

-

-

Required Tools and Equipment
SPECIAL SERVICE TOOLS (SST)

PART NUMBER

QTY

GR8 Battery Diagnostic Station **

00002-MCGR8

1

** Essential SST.

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

© 2014 Lexus, a division of Toyota Motor Sales, USA

L-SB-0011-14

February 13, 2014

Page 3 of 6

Maintenance for HV & Auxiliary Batteries

Before Delivery
Fully charge the 12-volt auxiliary battery:

1. Before charging the auxiliary battery, turn OFF all lights and accessories .
2. Locate the 12-volt auxiliary battery.
3. Remove the positive(+) terminal cover.

Figure 1.

1

I

Positive(+) Terminal Cover

4. Check the battery SOC.
• If the battery voltage is LESS THAN 12.6 V, then continue to step 5.
• If the battery voltage is 12.6 V or MORE, replace the positive(+) terminal , close the battery
cover, install the luggage compartment floor mat, and close the trunk.
CAUTION
If measuring the voltage with the negative (-) terminal connected, verify IG/OFF, and turn
headlights on for 60 seconds or more. This removes the surface charge.

© 2014 Lexus, a division of Toyota Motor Sales, USA

L-SB-0011-14

February 13, 2014

Page 4 of 6

Maintenance for HV & Auxiliary Batteries

Before Delivery
Fully charge the 12-volt auxiliary battery: (Continued)

5. Test the 12-volt auxiliary battery using the
GRB Battery Diagnostic Station (SST P/N
00002-MCGRB) . If charging is required , the GRB
will automatically start to charge .

Figure 2. GRB Battery Diagnostic Station

A. Connect the red charger clamp to the
positive (+) battery terminal and the
black charger clamp to the negative (-)
battery terminal.
B. Plug the charger into a grounded 110-volt
outlet and flip the power switch to the
"ON " position.
C. Once the charger is properly turned ON ,
perform a diagnostic charge by "MODEL.:'
(select the appropriate vehicle model).
The GRB Battery Diagnostic Station
will indicate result when complete.
If the battery tests bad ("Replace Battery"),
replace the auxiliary battery.
NOTE
• If the vehicle model is not listed in the model list, charge by battery stock code. To charge
by stock code, refer to the Lexus Battery Stock Number Chart located on the Technical
Information System (TIS), Diagnostics - Tools & Equipment- Battery Diagnostics.
• If the auxiliary battery was stored at 32°F (0°C) or below, charge the auxiliary battery in
a room above 32° F (0°C).

CAUTION
• Charge in a well-ventilated area.
• Do NOT allow sparks or fire near the auxiliary battery.

6. If the GRB Battery Diagnostic Station is NOT available, you may charge the 12-volt battery by
turning the vehicle to "READY" ON.
• Run time will vary depending on the state of charge.
• If this method is used , you MUST confirm that the battery is charged to 12.8 volts using
a DVOM .

© 2014 Lexus, a division of Toyota Motor Sales, USA

L-SB-0011-14

February 13, 2014

Page 5 of 6

Maintenance for HV & Auxiliary Batteries

To Store for 30 Days or More
Disconnect the negative (-) terminal:

1. Turn OFF all lights and accessories .
2. Disconnect the negative (-) terminal.

Figure 3.

NOTE
When it is necessary to move the vehicle,
reconnect the negative(-) terminal.

1

I

Negative (-) Terminal Cover

Every Two Months
Cycle vehicle to "READY" ON:
NOTE
• When the remaining capacity of the HV battery is low, the gasoline engine automatically starts
and the HV battery is charged. The 12-volt auxiliary battery is also charged by the HV battery
regardless of the gasoline engine operation .
• Be sure to reconnect the negative(-) terminal of the auxiliary battery before performing this
procedure.

1. Park the vehicle in open air or connect the exhaust extraction hose to the exhaust pipe.
2. Apply the parking brake.

© 2014 Lexus, a division of Toyota Motor Sales , USA

L-SB-0011-14

February 13, 2014

Page 6 of 6

Maintenance for HV & Auxiliary Batteries

Every Two Months
Cycle vehicle to "READY" ON: (Continued)

3. With the brake pedal depressed , push the
POWER switch and check that the "READY" light
in the meter illuminates when the hybrid system
starts (the "READY" light is ON) .

Figure 4.
~-------------~

4. Turn OFF all lights and accessories .
5. Check that the shift lever is in the "P" position.
6. Keep the "READY" light on and charge the
HV battery for 30 minutes.

Figure 5.

I Energy Monitor
NOTE
• If the amount of charging energy is
small, the display may NOT indicate the
energy flow.
• Ensure there is a sufficient amount of fuel
for the vehicle to run for 30 minutes.

ELECTRIC MOTOR

Consumption

© 2014 Lexus, a division of Toyota Motor Sales, USA

Past Record