Initializing Tire Pressure Monitor System
NOTE:
When a tire pressure sensor and/or tire pressure monitor ECU are replaced, the sensor ID must be memorized (registered) by the tire pressure monitor ECU prior to system initialization. See TIRE PRESSURE SENSOR REGISTRATION .
CAUTION:
Set tire pressure within the specified range before initializing. DO NOT push the reset switch without adjusting tire inflation pressure of all tires (including the spare tire). 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:
Perform the tire pressure adjustment after the tires have sufficiently cooled down.
- The initialization is normally is completed within 2 to 3 minutes.
- If the initialization has not been completed successfully, DTC C2177/77 will be set after approximately 20 minutes.
- Initialization can be terminated by connecting terminals 13 (TC) and 4 (CG) of the DLC3. See Fig 1.
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 tires (including the spare tire) have been received.
The initialization process is canceled if the ignition switch is turned to OFF position prior to the completion of initialization. To restart initialization, the tire pressure warning reset switch must be pressed again.
- Set tires to the specified (cold) pressures as indicated on the tire and loading information label.
- Turn ignition switch 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 (1 second on, 1 second off). See Fig 2.
- Turn ignition switch OFF.
- Connect the Techstream to the DLC3.
- Turn ignition switch ON.
- Turn Techstream ON.
- Check the Data List. Enter the following menus: Chassis / Tire Pressure Monitor / Data List.
- Confirmation that the initialization is completed is when the Data List "ID Tire Inflation Pressure" shows the correct tire pressures.NOTE: It may take about 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 (C2125/25: w/ Full Size Spare Tire). If the initialization has not been completed successfully, DTC C2177/77 will be set after the vehicle is driven for 20 minutes or more.