Tire Monitor System - Activation/Initialization
L-SB-0085-09July 15, 2009
Tire Pressure Warning System Activation & Initialization
Service Category
General
Section
Pre-Delivery Service
Market
USA
Applicability
Introduction
2010 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
Additional TIS Techstream units may be ordered by calling Approved Dealer Equipment (ADE).
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.
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 - C2114 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.
^ 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
^ Adjust the tire pressure when the tires are cold.
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.
It is necessary for the ignition to be in "IG-ON" mode AT LEAST 5 minutes for initialization to complete correctly.
3. Cycle the ignition "OFF" and then to "IG-ON"
4. Check the tire pressure values of all the tires using TIS Techstream.
If the tire pressure values CANNOT be displayed on the TIS Techstream screen, the initialization is NOT completed. Repeat steps 2 - 4.