L-SB-0071-14

September 25, 2014

Technical Service Information Bulletin

Tire Pressure Warning System Activation & Initialization
Service
Category

General

Section

Pre-Delivery Service

Market

Lexus Supports ~
ASE Certi!ication

W

USA

Applicability
YEAR(S)

MODEL(S)

2015

GS350, GS450H

ADDITIONAL INFORMATION

Introduction
2015 model year GS 350 and GS 450h vehicles are equipped with a direct-type Tire Pressure
Warning System (TPWS) . Each tire (except the spare tire) has a tire pressure warning valve/sensor
that measures tire pressure. The data is transmitted to the Tire Pressure Warning System
antenna/receiver and then to the Tire Pressure Warning System ECU.
During Pre-Delivery Service (PDS) , the tire pressure warning valves/sensors must be activated and
the system in itialized according to the procedure in this bulletin .
Required Tools & Equipment
REQUIRED EQUI PMENT

Techstream 2.0*
Techstream Lite

SUPPLIER

QTY

PART NUMBER

TS2UNIT

ADE

1

TSLITEPDLR01

• Essential SST.

NOTE

• Only ONE of the Techstream units listed above is required.
• Software version 9.20.022 or later is requ ired.
• Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE) at
1-800-368-6787.

Warranty Information
OP CODE

DESCRIPTION

TIME

OFP

T1

T2

N/A

Not Applicable to Warranty

-

-

-

-

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

Page

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L-SB-0071 -14

Septem ber 25, 2014

Page 2 of 5

Ti re Pressure Warning System Activation & Initialization

Reference
• After cycling the ignition to the "IG-ON" position,
the Low Tire Pressure Warning Light will blink for
1 minute and remain illuminated until all the tire
pressure warning valves/sensors are activated .

Figure 1.

• The Diagnostic Trouble Codes (DTCs) listed
below are stored in the TPWS ECU until the tire
pressure warning valves/sensors are activated
• The DTCs will automatically clear when the tire
pressure warning valves/sensors are activated

Low Ti re Pressure Warning Lig ht

OTC.,

·1

OTC

·2

OTC EXPLANATION

11

C2111

Transmitter 101 Inactive

12

C2112

Transmitter 102 Inactive

13

C2113

Transmitter 103 Inactive

14

C2114

Transmitter 104 Inactive

Indicated by flashing of the Low Tire Pressure Warn ing Light

·2. Indicated on Techstream

© 2014 Lexus, a d1v1s1on of Toyota Motor Sales, USA

L-SB-0071-14

September 25, 2014

Tire Pressure Warning System Activation & Initialization

Activation Procedure

1. Connect Techstream .

2. Cycle the ignition switch to the "IG-ON" position

Figure 2.

and check that the Low Tire Pressure Warning
Light blinks for 1 minute and then remains
illuminated.

1

3. Press or remove the va lve core to reduce the tire
inflation pressure rapidly by 6 psi (0 .4 kgf/cm2,
40 kPa) , or more, within 30 seconds. If the tire
inflation pressure is NOT reduced by 6 psi (0 .4
kgf/cm2, 40 kPa), or more, within 30 seconds, the
tire pressure warning valves/sensors will NOT
be activated.

I

Low Tire Pressure Wa rning Light

Figure 3.

NOTE

This operation is required for the system t o be
activated and must be performed for each tire
(except the spare tire), one at a time .

1

I

Core

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

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L-SB-0071 -14

September 25, 2014

Page 4 of 5

Tire Pressure Warning System Activation & Initialization

Activation Procedure (Continued)

4 . Using Techstream, check for TPWS DTCs.
• If NO OTCs are stored, go to step 1 of the Initialization Procedure.
• If DTCs C2111 - C2114 are stored . repeat step 3.
HINT
If the tire inflation pressure is NOT reduced by 6 psi (0.4 kgf/cm 2, 40 kPa) , or more, within 30
s econds, the tire pressure warn ing valves/sensors will NOT be activated and DTCs C2111 C2114 will be stored in t he TPWS ECU.

NOTE
If DTCs C2111 - C2114 are present after repeating step 3, lift the vehicle and turn each t ire
90 to 270 degrees. Then repeat steps 3 - 4.

Initialization Procedure

1. Cycle the ignition switch to the "IG-ON " position and connect Techstream.
2. Adjust all tires (except the spare tire) to the
standard tire infl ation pressure, as indicated on
the Tire and Loading Information label located
inside the vehicle and confirm that the Low Tire
Pressure Warning Light is OFF.

Figure 4.

NOTE
• To adjust tire pressure correctly when
outside temperature is significantly colder
than shop temperat ure, perform a Health
Check using Techst ream and select the
" Compensation Tire Pressure" checkbox.
Compensation pressures will be displayed
on the health check results screen .
• Adjust the tire pressu re when the t ires
are cold .

1

I

Tire and Loading Information Label

© 2014 Lexus a division of Toyota Motor Sales. USA

L-SB-0071-14

September 25, 2014

Page 5 of 5

Tire Pressure Warning System Activation & Initialization

Initialization Procedure (Continued)

3. Push and hold the Tire Pressure Warning "'SET'
Switch for 3 seconds until the Low Tire Pressure
Warning Light blinks 3 times and then turns OFF
to set the tire pressure initialization.

Figure s.

....-------- - - - - - - - - - - - .

NOTE

It is necessary for the ignition to be in the
" IG-ON" position AT LEAST 5 minutes for
initialization to complete correctly.

1

I

Tire Press ure Warning " SET" Switch

4. Cycle the ignition "OFF" and then to "IG-ON".
5. Check the tire pressure values of all the tires using Techstream.
Chassis/Tire Pressure Monitor/Data List
NOTE

It can take 2 - 3 minutes for the tire pressure values to be displayed on the Techstream
Data List.

© 2014 Lexus. a d1v1s1on of Toyota Motor Sales USA