Tire Monitor System - Warning Valve/Sensor Activation

PRE-DELIVERY SERVICE
PD021-07

July 19, 2007

Title:
TIRE PRESSURE WARNING VALVE/SENSOR ACTIVATION

Models:
'08 GX 470

Introduction

2008 model year GX 470 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, 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 according to the procedure in this bulletin.

Applicable Vehicles:
^ 2008 model year GX 470 vehicles.





Required Tools & Equipment

NOTE:
^ Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE) at 1-800-368-6787.

^ The Lexus Diagnostic Tester and CAN Interface Module may also be used to perform the service procedures listed in this bulletin.





Warranty Information

Reference





^ The Low Tire Pressure Warning Light will blink until all the tire pressure warning valves/sensors are activated.





^ The Diagnostic Trouble Codes (DTCs) shown 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. Turn the ignition switch to the "ON" position and check that the Low Tire Pressure Warning Light blinks.





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/cm2, 40 kPa), or more, within 30 seconds.

If the tire inflation pressure is NOT reduced by 6 psi (0.4 kgf/cm2, 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.

5. Using TIS Techstream, check for TPWS DTCs.

^ If NO DTCs are stored, go to step 6.

^ If DTCs C2111 - C2115 are stored, repeat step 4.





6. Adjust all tires (including the spare tire) to the standard tire inflation pressure and confirm that the Low Tire Pressure Warning Light is OFF.

NOTE:
^ If there is great difference between the current temperature of the tire and wheel (for example: shop temperature) and expected temperature (for example: outdoor temperature), this needs to be considered when adjusting the tire pressure.

^ Adjust the tire pressure when the tires are cold.