Canada - Tire Monitoring System - TPMS Light On
BulletinTSB2017
Issue Date
August 16, 2004
Title
TIRE PRESSURE WARNING SYSTEM (TPWS) LIGHT ON
Component
GENERAL INFORMATION
Models
'04 LS 430
On some 2004 model year LS 430 vehicles, the low tire message indicator on the combination meter display may illuminate without a noticeable change in tire pressure. This condition may be caused by one of the following conditions:
- If the initialization of the Tire Pressure Warning System (TPWS) is not conducted correctly during the Pre-Delivery Service Inspection (PDS), the low tire message indicator on the combination meter display may illuminate without a noticeable change in tire pressure. Always verify the system has been initialized during PDS.
- In rare instances, the TPWS operating logic may be sensitive to the various driving conditions under which a particular customer is operating their vehicle. The operating logic has been changed in the Skid Control ECU to help improve this condition for that particular customer.
For those cases where the system may be too sensitive, the operating logic has been changed in the Skid Control ECU to help improve this condition for that particular customer.
NOTE:
Most vehicles will require re-initialization of the TPWS only. Replace Actuator Assembly only on vehicles where the customers specific driving patterns cause the TPWS light to come on.
APPLICABLE VEHICLES:
- 2004 model year LS 430 vehicles produced BEFORE the Production Change Effective VINs shown below.
PRODUCTION CHANGE INFORMATION:
PARTS INFORMATION:
WARRANTY INFORMATION:
INITIALIZATION PROCEDURE:
NOTE:
In the following cases, the TPWS light may illuminate:
- Tire size is different from the original equipment specification.
- Different sizes or types of tires are used simultaneously.
- A spare tire, snow tires or tire chains are used.
- The vehicle is driven on an unpaved, extremely rough or slippery road.
- One of the tires on the vehicle is extremely worn.
- The vehicle is towing a trailer.
- Continuous rapid acceleration/deceleration or sharp turns.
- Outside temperature is below 32°F (0°C) or over 104°F (40°C).
NOTE:
Issue of this Technical Service Bulletin is to ensure that proper repair information is available. IT DOES NOT CONSTITUTE AN AUTHORIZATION FOR REPAIR. Normal provisions of the formal warranty policy, as applicable, will apply.