Tire Monitor System - Activation & Initialization

L-SB-0135-11

October 17, 2011

Tire Pressure Warning System Activation & Initialization

Service Category
General

Section
Pre-Delivery Service

Market
USA





Applicability

Introduction

2012 model year HS 250h 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 and the measured tire pressure data is transmitted to the Tire Pressure Warning System antenna/receiver to the Tire Pressure Warning System ECU.

During Pre-Delivery Service (PDS) the tire pressure warning valves/sensors must be activated and initialized according to the procedure in this bulletin.





Required Tools & Equipment





Warranty Information





Reference

^ After turning 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 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 flashes 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 inflation 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 (except spare tire), one at a time.

4. Using TIS Techstream, check for TPWS DTCs.

^ If no DTCs are stored, go to step 1 of the initialization procedure.

^ If DTCs C2111 - C21 14 are stored, repeat step 1.

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 driver's door jamb and confirm that the Low Tire Pressure Warning Light is OFF.

2. Push and hold the Tire Pressure Warning "SET" Switch for 3 seconds until the Low Tire Pressure Warning Light blinks 3 times and then turns OFF to set the tire pressure initialization.

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

4. Check the tire pressure values of all the tires using TIS Techstream.

NOTE

If the tire pressure values CANNOT be displayed on the TIS Techstream screen, the initialization is NOT completed. Repeat steps 2 - 4.