Initializing Tire Pressure Monitor System
NOTE:
The system will need to be initialized when tires are rotated; tires are replaced with tires of different pressures; tire pressure sensor and/or tire pressure monitor ECU are replaced; or when a new vehicle is delivered. Set tire pressure within the specified range before initializing. When a tire pressure sensor and/or tire pressure monitor ECU are replaced, the sensor ID must be memorized by the tire pressure monitor ECU prior to system initialization. See TIRE PRESSURE SENSOR REGISTRATION .
CAUTION:
DO NOT push the reset switch without adjusting tire inflation pressure of all 4 tires. Otherwise, the low tire pressure warning light may not come on even if the tire pressure is low, or it may come on when the tire inflation pressure is actually normal. If you push the reset switch while the vehicle is moving, initialization is not performed.
NOTE:
To confirm that initialization has completed successfully, the Toyota Techstream is used.
During initialization, the tire pressure sensor measures the inflation pressure of the tires, and registers the signals that are transmitted into the tire pressure monitor ECU at a frequency of one per minute. The initialization process is completed when the signals from the 4 tires have been received.
- Set the tire pressure of all wheels to pressure specified on the tire and loading information label.NOTE: Perform the tire pressure adjustment after tire temperatures have sufficiently cooled down.
- With the vehicle stopped and parking brake applied, turn ignition ON.
- Press and hold the tire pressure warning reset switch for 3 seconds or more so that the tire pressure warning light blinks 3 times and the message "TIRE PRESSURE RESET PROCEEDING" appears on the multi-information display. See Fig 1.
- Confirm that initialization is complete using the Techstream:
- With ignition OFF, connect the Techstream to the DLC3.
- Turn ignition ON, then turn the Techstream ON.
- Enter the following menus: Chassis / Tire Pressure Monitor / Data List.
- Confirm that the tire pressure data of all tires is displayed on the Techstream screen.
NOTE: It may take up to 2 or 3 minutes until the values are displayed. If the values are not displayed after a few minutes, perform troubleshooting according to the inspection procedure for DTCs C2121/21 to C2124/24.
NOTE:
If initialization has not been completed successfully, DTC C2177/77 is stored after a vehicle speed of more than 8 km/h (5 mph) continues for 20 minutes or more.
NOTE:
Initialization can be terminated by connecting terminals 13 (TC) and 4 (CG) of the DLC3. See Fig 2.