Tire Monitor System - Activation And Initialization
T-SB-0251-10August 16, 2010
Tire Pressure Warning System Activation and Initialization
Service Category
General
Section
Pre-Delivery Service
Market
USA
Applicability
Introduction
The 2011 model year Highlander is equipped with a direct-type Tire Pressure Warning System (TPWS). Each tire (including the spare tire) system has a tire pressure warning valve/sensor that measures tire pressure data. 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 according to the procedure in this bulletin.
Required Tools & Equipment
NOTE
Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE).
Warranty Information
Reference
^ After cycling the ignition switch to the "IG-ON" mode, 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" mode and check that the Low Tire Pressure Warning Light blinks 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, (including the 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 3.
Initialization Procedure
1. Adjust all tires (including the spare tire) to the standard tire inflation pressure as indicated on the Tire and Loading Information label located inside the vehicle and confirm that the Low Tire Pressure Warning Light is OFF.
NOTE
^ To adjust the tire pressure correctly when outside the temperature is significantly colder or warmer than shop temperature, follow the procedures outlined in 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 "IG-ON" mode AT LEAST 5 minutes for initialization to complete correctly.
3. Cycle the ignition switch to the "OFF" position and then to the "IG-ON" position.
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 - 3.