L-SB-0035-16

July 8, 2016

Intermittent Battery Discharge
Service
Category

Power Source/Network

Section

Battery/Charging

Market USA

Applicability
YEAR(S)

MODEL(S)

ADDITIONAL INFORMATION

2013 - 2014

ES350, GS350

2014 - 2015

IS250, IS350

Introduction

Some 2013 – 2015 model year Lexus ES, GS, and IS vehicles may exhibit an intermittent
discharged battery occurring with no apparent source of discharge found. One possible cause
may be the Network Gateway Computer not properly going into sleep mode at key OFF. This can
result in excessive parasitic draw and a discharged battery condition. Follow the procedure in this
bulletin to identify and address this condition.
Production Change Information

This bulletin applies to vehicles equipped with the options and produced BEFORE the Production
Change Effective VINs shown below.
MODEL

DRIVETRAIN

EQUIPPED OPTIONS

PRODUCTION CHANGE EFFECTIVE VIN

ES350

2WD

Blind Spot Monitor
or
Clearance Warning Sonar

JTHBK1GG#E2149103

GS350

AWD

GS350

2WD

IS250

2WD

IS250

AWD

IS350

2WD

IS350

AWD

Blind Spot Monitor
or
Lane Departure Alert

JTHCE1BL#E5028690
JTHBE1BL#E5044369
JTHBF1D2#F5048786

Blind Spot Monitor
or
Clearance Warning Sonar

© 2016 Lexus, a division of Toyota Motor Sales, USA

JTHCF1D2#F5017491
JTHBE1D2#F5015465
JTHCF1D2#F5006395

Page 1 of 8

L-SB-0035-16

July 8, 2016

Page 2 of 8

Intermittent Battery Discharge
Warranty Information
OP CODE

DESCRIPTION

TIME

OFP

T1

T2

EL1609

R & R Network Gateway ECU

1.2

89111-33070
89100-30180
89100-30151

87

74

APPLICABLE WARRANTY
This repair is covered under the Lexus Basic Warranty. This warranty is in effect for 48 months
or 50,000 miles, whichever occurs first, from the vehicle’s in-service date.
Warranty application is limited to occurrence of the specified condition described in
this bulletin.

Parts Information
PART NUMBER
MODEL
PREVIOUS

NEW

ES350

89111-33070

89111-33110

GS350

89100-30180

89100-30181

IS250, IS350

89100-30151

89100-30160

PART NAME

QTY

Computer, Network Gateway

1

© 2016 Lexus, a division of Toyota Motor Sales, USA

L-SB-0035-16

July 8, 2016

Page 3 of 8

Intermittent Battery Discharge
Required Tools & Equipment
SPECIAL SERVICE TOOLS (SST)

PART NUMBER

QTY

GR8*

00002-MCGR8

1

NOTE
Additional SSTs may be ordered by calling 1-800-933-8335.
REQUIRED TOOLS & MATERIAL

QUANTITY

DVOM (Digital Volt Ohm Meter)

1

REQUIRED EQUIPMENT

SUPPLIER

Techstream 2.0*
Techstream Lite

PART NUMBER

QTY

TS2UNIT
ADE

Techstream Lite (Green Cable)

TSLITEPDLR01
TSLP2DLR01

* Essential SST.

NOTE
Only ONE of the Techstream units listed above is required.
Software version 11.10.034 or later is required.
Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE)
at 1-800-368-6787.

© 2016 Lexus, a division of Toyota Motor Sales, USA

1

L-SB-0035-16

July 8, 2016

Page 4 of 8

Intermittent Battery Discharge
Repair Procedure

1. Load test the battery with the GR8 Battery Diagnostic Station.
A. Select Diagnostic from the Main Menu.

Figure 1.

NOTE
Repairs to correct a battery fail condition are NOT covered by this TSIB.
GR8 Battery Diagnostic Station must be used to test battery.
Do NOT use Battery Test function on the Main Menu.
Detailed information on battery testing can be found in the Battery Testing and
Charging Best Practices Quick Training Guide – QL614C.

Did the battery pass the GR8 Diagnostic test?
 YES – Proceed to step 2.
 NO – STOP! Battery Test fail condition MUST be corrected before continuing with
this bulletin.

© 2016 Lexus, a division of Toyota Motor Sales, USA

L-SB-0035-16

July 8, 2016

Page 5 of 8

Intermittent Battery Discharge
Charging System Test

2. Start the engine and maintain an engine speed Figure 3.
of 2,000 RPM with all accessories OFF.
A. Verify that the voltage and amperage are
within specification:
Standard amperage: 10 A or less**
Standard voltage: 13.2 to 14.8 V
** Battery must be fully charged.
B. With the engine running at 2,000 RPM, turn
the high beam headlights ON and turn the
heater blower switch to the ”HI” position.
Verify that the voltage and amperage are
within specification:
Standard amperage: 30 A or more
Standard voltage: 13.2 to 14.8 V
Did the Charging System pass the Charging System Test?
 YES – Proceed to step 3.
 NO – STOP! Charging System fail condition must be corrected before continuing
with this bulletin.
NOTE
Repairs to correct a Charging System Test fail condition are NOT covered by
this TSIB.
Detailed information on testing the charging system can be found in the Toyota
Starting, Charging and Parasitic Draw Tests Quick Training Guide QT611B.

© 2016 Lexus, a division of Toyota Motor Sales, USA

L-SB-0035-16

July 8, 2016

Page 6 of 8

Intermittent Battery Discharge
Parasitic Draw Test

3. Loosen the negative (–) battery cable so it
will be easy to remove for the test.

Figure 4.

A. Lock the hood latch using a screwdriver
and roll the driver’s window down.
NOTE
This closes the hood latch switch
and enables the theft deterrent
system in case it is the source of
the parasitic draw.

B. Turn the ignition ON and then OFF.
C. Turn OFF all electrical loads, close and lock the doors, then wait for the ECUs to go into
sleep mode. This may take anywhere from 10 minutes to 2 hours dependent upon which
vehicle is being serviced and what equipment is installed in the vehicle.
D. Attach the negative (–) lead of the
ammeter to the negative (–) battery post
and the positive lead of the ammeter to
the negative (–) battery cable end.

Figure 5.

NOTE
Place leads without
disconnecting the battery cable.
If the ammeter leads become
disconnected from the battery
post or battery cable during the
test, reconnect the battery and
restart the test from step B.
If the ammeter leads become
disconnected from the battery
post or battery cable during the
test refer to the applicable repair
instructions on TIS for
initialization procedures
necessary when the battery
terminal is
disconnected/reconnected.
Average milliamp setting should
be used. Disregard Minimum and
Maximum values for this test.

© 2016 Lexus, a division of Toyota Motor Sales, USA

L-SB-0035-16

July 8, 2016

Page 7 of 8

Intermittent Battery Discharge
Parasitic Draw Test (Continued)

E. Remove the negative (–) battery cable
without breaking the circuit between
the battery and vehicle, and record the
meter reading.

Figure 6.

NOTE
After completing the parasitic
draw test remove the screwdriver
from the hood latch and operate
the hood release lever
Verify the hood latch is in the
open position before attempting
to close the hood.

Standard average parasitic draw:
Less than 50 milliamps average (0.050 amp)
Did the system (or vehicle) pass the Parasitic Draw Test?


YES – Proceed to step 4.



NO – Parasitic draw fail condition must be corrected before continuing with
this bulletin.

NOTE
Repairs to correct a Parasitic Draw Test fail condition are NOT covered by
this TSIB.
Detailed information on testing the parasitic draw can be found in the Toyota
Starting, Charging and Parasitic Draw Tests Quick Training Guide QT611B.

© 2016 Lexus, a division of Toyota Motor Sales, USA

L-SB-0035-16

July 8, 2016

Page 8 of 8

Intermittent Battery Discharge
Network Gateway ECU

4. Remove the Network Gateway ECU and check the part number.
Refer to the Technical Information System (TIS), applicable model and model year
Repair Manual:


2013 / 2014 ES350:
Power Source/Network – Networking – “Networking: Network Gateway ECU: Removal”



2013 / 2014 GS350:
Power Source/Network - Networking – “Networking: Network Gateway ECU: Removal”



2014 / 2015 IS250 / IS350:
Power Source/Network - Networking – “Networking: Network Gateway
ECU: Removal”

Is the Network Gateway ECU part number the same as the Previous Part Number shown in
the Parts Information section?
 YES – Proceed to step 5.
 NO – This bulletin does NOT apply. Reinstall network Gateway ECU and continue
diagnosis using the applicable Repair Manual.
5. Install the NEW Network Gateway ECU.
Refer to TIS, applicable model and model year Repair Manual:


2013 / 2014 ES350:
Power Source/Network - Networking – “Networking: Network Gateway ECU: Installation”



2013 / 2014 GS350:
Power Source/Network - Networking – “Networking: Network Gateway ECU: Installation”



2014 / 2015 IS250 / IS350:
Power Source/Network - Networking – “Networking: Network Gateway ECU: Installation”

6. Clear Diagnostic Trouble Codes.
7. Using TIS Techstream, perform a Health Check and confirm no current DTCs are present.
NOTE
If current DTCs are present, diagnose per Repair Manual procedures.

© 2016 Lexus, a division of Toyota Motor Sales, USA