July 26, 2013

L-SB-0033-13

Tire Pressure Warning System Activation & Initialization
Service
Category

General

Section

Pre-Delivery Service

Market

USA

Applicability
YEAR(S)

MODEL(S)

2014

RX350, RX450H

ADDITIONAL INFORMATION

Introduction

2014 model year RX 350 and RX 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 data. 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
for Japan-built vehicles by following the activation procedure in this bulletin. NAP-built vehicles do
NOT require activation, but both Japan-built (VINs start with “J”) and NAP-built (VINs start with “2”)
vehicles require the TPWS to be initialized by following the initialization procedure in this bulletin.
Required Tools & Equipment
REQUIRED EQUIPMENT

PART NUMBER

SUPPLIER

Techstream 2.0*
TIS Techstream

QTY

TS2UNIT
1

TSPKG1

ADE

Techstream Lite

TSLITEDLR01

* Essential SST.

NOTE
• Only ONE of the Techstream units listed above is required.
• Software version 8.20.019 or later is required.
• 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

–

–

–

–

© 2013 Lexus, a division of Toyota Motor Sales, USA

Page 1 of 5

July 26, 2013

L-SB-0033-13

Page 2 of 5

Tire Pressure Warning System Activation & Initialization

Reference
• After cycling the ignition to the “IG-ON”

Figure 1.

position, the Low Tire Pressure Warning
Light will blink until all the tire pressure
warning valves/sensors are activated.
1

• The Diagnostic Trouble Codes (DTCs) listed

below may be 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.

1

DTC NO.

*1

DTC NO.

Low Tire Pressure Warning Light

DTC EXPLANATION

*2

11

C2111

Transmitter ID1 Operation Stop (Sleep Mode)

12

C2112

Transmitter ID2 Operation Stop (Sleep Mode)

13

C2113

Transmitter ID3 Operation Stop (Sleep Mode)

14

C2114

Transmitter ID4 Operation Stop (Sleep Mode)

*1

: DTC No. indicated by blinking of the Low Tire Pressure Warning Light.

*2

: DTC No. indicated on Techstream.

© 2013 Lexus, a division of Toyota Motor Sales, USA

L-SB-0033-13

July 26, 2013

Page 3 of 5

Tire Pressure Warning System Activation & Initialization

Activation Procedure
NOTE
ONLY perform the following activation procedure on Japan-built vehicles.

1. Connect Techstream.
2. Cycle the ignition switch to the “IG-ON” position
and check that the Low Tire Pressure Warning
Light blinks.

Figure 2..

1

1

3. Press or remove the valve core to reduce the tire
inflation pressure rapidly by 6 psi (0.4 kgf/cm2,
40 kPa), or more, within 30 seconds.

Low Tire Pressure Warning Light

Figure 3..

1

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.
NOTE
This operation is required for the system to be
activated and MUST be performed for each tire
(except the spare tire) one at a time.
1

Core

4. Check that the Low Tire Pressure Warning Light goes OFF after all the tire pressure warning
valves/sensors are activated.
5. Using Techstream, check for TPWS DTCs.
• If NO DTCs are stored, go to step 1 of the Initialization Procedure.
• If DTCs C2111 – C2114 are stored, repeat step 3.
• If any other DTCs are stored, refer to the Repair Manual.

© 2013 Lexus, a division of Toyota Motor Sales, USA

L-SB-0033-13

July 26, 2013

Page 4 of 5

Tire Pressure Warning System Activation & Initialization

Initialization Procedure
NOTE
Perform the following initialization procedure for BOTH NAP-built and Japan-built vehicles.

1. Cycle the ignition switch to the “IG-ON” mode and connect Techstream.
2. Adjust all tires (except the spare tire) to the
standard tire inflation 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..

1

NOTE
• To adjust tire pressure correctly when
outside temperature is significantly colder
than shop temperature, perform a Health
Check using Techstream and select the
“Compensation Tire Pressure” checkbox.
Compensation pressures will be displayed
on the health check results screen.
• Adjust the tire pressure when the tires
are cold.

1

Tire and Loading Information Label

NAP-BUILT VEHICLES:
Remove the ID number labels that are attached
to each wheel and place the labels in the
glove box.

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 5..

1

1

Tire Pressure Warning “SET” Switch

© 2013 Lexus, a division of Toyota Motor Sales, USA

L-SB-0033-13

July 26, 2013

Page 5 of 5

Tire Pressure Warning System Activation & Initialization

Initialization Procedure (Continued)

4. Cycle the ignition switch to the “OFF” position and then to the “IG-ON” position.
NOTE
It is necessary for the ignition to be in the "IG-ON" mode at LEAST 5 minutes for initialization
to complete correctly.

5. Check the tire pressure values of all the tires using Techstream.
NOTE
• It can take 2 – 3 minutes for the tire pressure values to be displayed on the Techstream
Data List.
• If the tire pressure values CANNOT be displayed on the Techstream screen, the
initialization is NOT completed. Repeat steps 2 – 4.

© 2013 Lexus, a division of Toyota Motor Sales, USA