Tire Monitor System - Initialization Procedure

T-SB-0363-08

November 12, 2008

Tire Pressure Warning System Initialization

Service Category
General

Section
Pre-Delivery Service

Market
USA





Applicability

Introduction

The 2009 model year Sequoia is equipped with a direct-type Tire Pressure Warning System (TPWS). Each tire (except 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 System must be initialized according to the procedure in this bulletin.

NOTE: The Tire Pressure Warning System valves/sensors are activated at the manufacturing plant. Only the initialization process is required during PDS.





Required Tools & Equipment

NOTE:
Additional TIS Techstream units may be ordered by calling Approved Dealer Equipment (ADE).





Warranty Information

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 on the vehicle.

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.





2. Turn the ignition switch to the "IG-ON" position and check that the Low Tire Pressure Warning Light is OFF.





3. 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, indicating the system initialization has begun.

The ignition switch MUST be left in the "IG-ON" position for AT LEAST 7 minutes for initialization to complete.

CAUTION:
Initialization will NOT complete if the ignition switch is NOT left in the "IG-ON" position for AT LEAST 7 minutes.

4. Connect TIS Techstream to DLC3.

5. Select the Tire Pressure Warning System Data List.

TPWS ECU / DATA LIST / TIREPRESS 1 - 4

6. Confirm that each tire pressure on the TIS Techstream Data List shows the set value from step 1.

- If the tire pressure is correct, initialization is complete.

- If the tire pressure is incorrect, check the tire pressure gauge and repeat steps 1 - 6.

NOTE:
If the tire pressure values cannot be displayed on the TIS techstream screen, the initialization is NOT complete. Repeat steps 1-6.