L-SB-0036-19

L-SB-0036-19
September 4, 2019
ABS Brake Warning Light On and/or Trac Warning Light
On
Service
Category
Brake
Section
Brake Control/Dynamic Control System
Market USA
Applicability
YEAR(S)
MODEL(S)
2013 - 2015
ES300H
ADDITIONAL INFORMATION
Introduction
Some 2013 – 2015 model year ES300h vehicles may exhibit a condition where the brake, ABS,
and/or TRAC warning lights are on and/or a Check VSC message displays. One or more of the
following Diagnostic Trouble Codes (DTCs) C1391, C1252, C1256, or C1253 will be stored in the
vehicle’s memory to be used as verification. This condition may be caused by a small internal
brake fluid leak in the brake booster assembly with master cylinder. Follow the Repair Procedure
in this bulletin to address this condition.
Warranty Information
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
BR1909
R & R Brake Booster Assembly
With Master Cylinder
and
R & R Brake Booster Pump Assembly
3.5
47050-33100
8C
99
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.
© 2019 Lexus, a division of Toyota Motor Sales, USA
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L-SB-0036-19
September 4, 2019
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ABS Brake Warning Light On and/or Trac Warning Light On
Parts Information
PART NUMBER
PART NAME
QTY
04009-05433
Brake Booster Assy W/Master Cylinder
1
04008-54833
Pump Assy, Brake Booster
1
PREVIOUS
NEW
47050-33100
47070-33020
Required Tools & Equipment
REQUIRED EQUIPMENT
SUPPLIER
PART NUMBER
Techstream ADVi*
TSADVUNIT
Techstream 2.0
Techstream Lite
QTY
TS2UNIT
ADE
TSLITEPDLR01
Techstream Lite (Green Cable)
TSLP2DLR01
*Essential SST.
NOTE
 Only ONE of the Techstream units listed above is required.
 Software version 14.20.019 or later is required.
 Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE)
at 1-800-368-6787.
REQUIRED TOOLS & MATERIAL
FLUID TYPE
QUANTITY
Brake Fluid
DOT3 Brake Fluid
1 – 2 liters
Repair Procedure
1. Confirm the condition exists.
Are the brake, ABS, and/or TRAC warning lights ON and/or does a Check VSC
message display?

YES — Continue to step 2.

NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
2. Using Techstream, check for and record ANY stored DTCs.
Are ANY of the following DTCs stored: C1391, C1252, C1256, or C1253?

YES — Continue to step 3.

NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
© 2019 Lexus, a division of Toyota Motor Sales, USA
1
L-SB-0036-19
September 4, 2019
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ABS Brake Warning Light On and/or Trac Warning Light On
Repair Procedure (continued)
3. Remove the brake booster assembly with master cylinder.
Refer to TIS, applicable model and model year Repair Manual:

2013 / 2014 / 2015 ES300h:
Brake – Brake System – “Brake System (Other): Brake Booster: Removal”
4. Remove the brake booster pump assembly.
Refer to TIS, applicable model and model year Repair Manual:

2013 / 2014 / 2015 ES300h:
Brake – Brake System – “Brake System (Other): Brake Booster Pump: Removal”
5. Install the NEW brake booster assembly with master cylinder.
Refer to TIS, applicable model and model year Repair Manual:

2013 / 2014 / 2015 ES300h:
Brake – Brake System – “Brake System (Other): Brake Booster: Installation”
6. Install the NEW brake booster pump assembly.
Refer to TIS, applicable model and model year Repair Manual:

2013 / 2014 / 2015 ES300h:
Brake – Brake System – “Brake System (Other): Brake Booster Pump: Installation”
7. Test-drive the vehicle to confirm the repair.
© 2019 Lexus, a division of Toyota Motor Sales, USA