Initialization Of Tire Pressure Warning System (PD003-03)

INITIALIZATION OF TIRE PRESSURE WARNING SYSTEM

TECHNICAL SERVICE BULLETIN

Introduction

While the vehicle is in motion, the Tire Pressure Warning System (TPWS) monitors the wheel speed signals that are output by the speed sensors for the brake control system. The system informs the driver if it detects low tire pressure in one or more of the tires.

To operate the tire pressure warning system under normal conditions, the TPWS ECU must be initialized with the tires at the specified tire inflation pressure.

Tire pressure is set high at the assembly plant for transport and storage to prevent tire flat spots. Therefore, after adjusting all the tires to the standard air pressure, please perform initialization of the TPWS ECU at your dealership prior to delivery.

Applicable Vehicles

2004  model year LS 430  vehicles.

Warranty Information

OP CODE	DESCRIPTION	TIME	OFP	T1	T2
N/A	Not Applicable to Warranty	---	---	---	---

Initialization Procedure

1. Adjust all tires to the standard air pressure.
   TIRE PRESSURE SPECIFICATION
   
   

   TIRE SIZE	TIRE PRESSURE (psi, kgf/cm2, kPa)
   245/45R18 96W	33, 2.3, 230
   P225/55R17 95H	32, 2.2, 220

2. Turn the ignition switch to the "ON" position, then push and hold the reset switch until "Pressure Initial" appears on the multi-information display (see Fig 1).
   Fig 1: Low Tire Pressure Warning Light And "Pressure Initial"

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Push and hold the tire pressure warning reset switch until the low tire pressure warning light and "Pressure Initial" light goes off on the multi-information display (see Fig 2).
   NOTE: If the low tire pressure warning light doesn't go off, release your finger from the tire pressure warning reset switch and press it once again.
   Fig 2: Tire Pressure Warning Reset Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002