Tire Monitor System - Activation And Initialization
L-SB-0129-10September 29, 2010
Tire Pressure Warning System Activation & Initialization
Service Category
General
Section
Pre-Delivery Service
Market
USA
Applicability
Introduction
2011 model year LS 460 vehicles are equipped with a direct-type Tire Pressure Warning System (TPWS). Each tire (including 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 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
^ The Low Tire Pressure Warning Light will blink for one minute and then 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 Check Tire Pressure System" on the multi-information display will disappear when the tire pressure warning valve/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.
"Check Tire Pressure System" is displayed on the multi-information display until all tire pressure warning valve/sensors are activated.
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.
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 5.
^ If DTCs C21 11 - C21 15 are stored repeat step 3.
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 - C2115 will be stored in the TPWS ECU.
5. Press the "DISP" switch on the steering wheel and check that the tire pressure are displayed on the multi-information display.
^ The tire pressure display is NOT shown until all tire pressure warning valve/sensors are activated.
^ If "Check Tire Pressure System" or "CHECKING" (which means the tire pressures are being measured) is displayed, repeat step 3. If step 3 is performed and the tire pressures are still NOT displayed, turn the tires 90 to 270 degrees.
^ If the above steps are performed and the multi-information display does NOT show the tire pressures, refer to the Repair Manual.
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 driver's doorjamb.
^ 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 (L-SB-0154-08).
^ Adjust the tire pressure when the tires are cold.
2. Cycle the ignition switch to the "IG-ON" mode and then 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.
^ Make sure that the "Tire Pressure Reset Proceeding" appears on the multi-information display. After a few seconds, the display changes to "CHECKING" (which means the tire pressures are being measured).
^ It is necessary for the ignition to be in the "IG-ON" mode a maximum of 5 minutes for initialization to complete correctly.
3. Cycle the ignition switch "OFF" and then to "IG-ON"
4. Check that the tire pressures are displayed on the multi-information display.
If the tire pressure values are NOT displayed on the multi-information display the initialization is NOT complete. Repeat Steps 1-4.
^ Check that the tire pressure adjusted in step 6 is displayed.
^ Initialization will be completed if signals are received from all 5 tires. It takes 2 to 3 minutes to display the tire pressure data.