Tire Monitor System - Activation Procedure

L-SB-0042-12

June 5, 2012

Tire Pressure Warning System Activation

Service Category
General

Section
Pre-Delivery Service

Market
USA





Applicability

Introduction

2013 model year GX 460 vehicles are equipped with a direct-type Tire Pressure Warning System (TPWS). Each tire (including 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 according to the procedure in this bulletin.





Required Tools & Equipment





Warranty Information

Reference





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

^ 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.

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 blinks for 1 minute, and then remains illuminated.





3. 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.

If the tire in.ation pressure is NOT reduced by 6 psi (0.4 kgf/sq.cm, 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 (including the spare tire), one at a time.

4. Using TIS Techstream, check for TPWS DTCs.

If NO DTCs are stored, go to step 5.

If DTCs C2111 - C2115 are stored, repeat step 3.

5. Adjust all tires (including the spare tire) to the standard tire in.ation pressure as indicated on the Tire and Loading Information Label on the vehicle. Confirm that the Low Tire Pressure Warning Light is OFF.

NOTE

To adjust tire pressure correctly when outside temperature is significantly colder or warmer than shop temperature, please reference the Tire Inflation Pressure Compensation and Adjustment Service Bulletin (L-SB-0160-11).

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