Canada - Tire Monitor System - Initialization Procedure

Bulletin
TSB2082R

Issue Date
September 14, 2004

Market
Canada



Title
INITIALIZATION OF TIRE PRESSURE WARNING SYSTEM

Component
GENERAL INFORMATION

Models
'05 - '06 Matrix

TSB REVISION NOTICE:
- August 22, 2005: 2006 model year has been added to Applicable Vehicles, the note in step has been updated, and a reference has been added to step 3.
- November 01, 2004: Text has been revised in Introduction.
- October 21, 2004: Text has been revised in Introduction and in Reference section.
The previous TSB should be discarded.

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 uses the relative wheel speed method to detect low tire pressure in one or more of the tires. The relative wheel speed method utilizes the changes in the wheel speeds that occur when the actual radius of a tire decreases due to a low tire pressure. This method refers to the normal tire pressure as the standard value when initializing.

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:
- 2005 - 2006 model year Matrix vehicles produced.






WARRANTY INFORMATION:

INITIALIZATION PROCEDURE:







1. Adjust all tires to the standard air pressure.







2. Turn the ignition switch to the "ON" position with the vehicle stopped.







3. Push and hold the tire pressure warning reset switch for 3 seconds until the low tire pressure warning light blinks 3 times. Ensure that the tire pressure warning light goes off.

NOTE:
If the low tire pressure warning light does not blink, release the tire pressure warning reset switch and repeat step 3 again.

REFERENCE:
While TPWS initialization is in progress, the tire pressure will be monitored.

The TPWS ECU will start to record vehicle data once the initialization process has started. The data collection process and initialization completion will depend on the vehicle owner's driving patterns, habits and trip duration. Once the data collection process in complete, the accuracy of tire pressure detection will be increased.