Tire Monitor System - Activation And Initialization

L-SB-0073-12

September 7, 2012

Tire Pressure Warning System Activation & Initialization

Service Category
General

Section Pre-Delivery Service

Market
USA





Applicability

Introduction

2013 model year IS 250/350 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 initialized according to the procedure in this bulletin.





Required Tools & Equipment





Warranty Information

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

^ 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.

Activation Procedure

1. Connect TIS Techstream.

2. Cycle the ignition switch to the "IG-ON" position and check that the Low Tire Pressure Warning Light flashes for 1 minute and then remains illuminated.

3. Press and hold either the right or left side of the satellite switch until the multi-information display for "TIRE SELECT" appears. Check that "MAIN" is selected.

NOTE

If "2ND" is selected, press the "ON/OFF" button until "MAIN" is selected.

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

5. Using TIS 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 4.

HINT

If the tire in.ation pressure is NOT reduced by 6 psi (0.4 kgf/sq.cm, 40 kPa), or more, within 30seconds, the tire pressure warning valves/sensors will NOT be activated and DTCs C2111 - C2114 will be stored in the TPWS ECU.

NOTE

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

Initialization Procedure

1. 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.

NOTE

To adjust tire pressure correctly when outside temperature is significantly colder or warmer than shop temperature, please reference Service Bulletin No. L-SB-0160-11, "Tire Inflation Pressure Compensation and Adjustment".

2. Press and hold the left or right side of the satellite switch to display the "TIRE PRESSURE".

3. Press and hold the "ON/OFF" button until the Low Tire Pressure Warning Light blinks 3 times and then turns OFF to set the tire pressure initialization.

4. Cycle the ignition "OFF" and then to "IG-ON"

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 TIS Techstream.

TPWS ECU / DATA LIST / TIREPRESS 1-4

NOTE

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

© 2012 Lexus, a division of Toyota Motor Sales, USA