Tire Pressure Monitor - Warning Valve/Sensor Activation

PRE-DELIVERY SERVICE
PD105-07

Title:
TIRE PRESSURE WARNING
VALVE/SENSOR ACTIVATION

Models:
'08 Prius

August 8, 2007

Introduction
The 2008 model year Prius is equipped with a direct-type Tire Pressure Warning System (TPWS). Each 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 Prius vehicles.





Required Tools & Equipment

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





Warranty Information

Reference





^ After turning the ignition to the "IG-ON" position, the Low Tire Pressure Warning Light will blink for 1 minute and then turn ON 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 DTCs will automatically clear when the tire pressure warning valves/sensors are activated.

Activation Procedure

1. Connect TIS Techstream.





2. Turn the power switch to the "IG-ON" mode and check that the Low Tire Pressure Warning Light flashes for 1 minute and then turns ON.





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, one at a time.





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.

HINT:
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 and DTCs C2111 - C2114 will be stored in the TPWS ECU.

5. Adjust all tires to the standard tire inflation pressure, as indicated on the Tire and Loading Information label located inside the driver's door jamb.

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.

6. Cycle the power switch "OFF" and then back "ON".





7. 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 begin the tire pressure initialization.

NOTE:
It is necessary for the ignition to be in "IG-ON" mode a minimum of 5 minutes for initialization to complete correctly.

8. Check the tire pressure values all the tires using TIS Techstream.

TPWS ECU / DATA LIST /
TIREPRESS 1-4

NOTE:
It can take 2 - 3 minutes for the tire pressure values to be displayed on the TIS Techstream Data List.