Tire Monitor System - Activation & Initialization
L-SB-0121-09September 22, 2009
Tire Pressure Warning System Activation & Initialization
Service Category
General
Section
Pre-Delivery Service
Market
USA
Applicability
Introduction
2010 model year GS 450h 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 that measures tire pressure. The data is transmitted to the Tire Pressure Warning System antenna/receiver and then to the Tire Pressure Warning System ECU.
During Pre-Delivery Service (PDS) the tire pressure warning valves/sensors must be activated and the system 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 cycling the ignition to the "IG-ON" position, the Low Tire Pressure Warning Light will blink for 1 minute and remain illuminated until all the tire pressure warning valves/sensors are activated.
^ The Diagnostic Trouble Codes (DTCs) listed below are 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 blinks for 1 minute and then remains illuminated.
3. Check that the "MAIN/2nd" switch is in the UP position (system is in "MAIN" mode).
4. 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.
NOTE
This operation is required for the system to be activated and must be performed for each tire (except the spare tire), one at a time.
5. 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 4.
HINT
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 and DTCs C2111 - C2114 will be stored in the TPWS ECU.
NOTE
If DTCs C2111 - C2114 are present after repeating step 4, lift the vehicle and turn each tire 90 to 270 degrees. Then repeat step 4.
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 doorjamb.
NOTE
^ 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.
NOTE
It is necessary for the ignition to be in the "IG-ON" position 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.
TPWS ECU/Data List/ TIREPRESS 1-4
NOTE
It can take 2 - 3 minutes for the tire pressure values to be displayed on the TIS Techstream Data List.