Tire Monitor System - Activation Procedure

T-SB-0151-11

October 5, 2011

Tire Pressure Warning System Activation

Service Category
General

Section
Pre-Delivery Service

Market
USA





Applicability

Introduction





2012 model year 4Runner 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 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.





Required Tools & Equipment





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 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" position 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.

4. Using TIS Techstream check for TPWS DTCs.

If NO DTCs are stored go to step 5.

^ If DTCs C2111 - C2114 are stored repeat step 3. If any other DTCs are stored refer to the Repair Manual.





5. Adjust all tires (excluding the spare tire) to the standard tire inflation pressure as indicated on the Tire and Loading Information label located inside the driver's doorjamb.

6. Confirm that the Low Tire Pressure Warning Light is OFF.