Set the inflation pressure of all tires to the normal value.
Connect the LEXUS hand-held tester to DLC3.
Turn the ignition switch ON.
When registering to "Main":
Using the LEXUS hand-held tester, select the registration mode,"Main".
Forcibly transmit the transmitter IDs for all wheels.
HINT:
The transmitter ID can be transmitted by rapidly reducing the tire inflation pressure.
When rapidly reducing the pressure, loosen the valve core.
Increase or decrease the tire inflation pressure by 20 kPa (0.2 kgf/sq.cm, 2.9 psi) or more within 15 sec. for each tire.
Using the LEXUS hand-held tester, make sure that the number of the registered ID is 4.
HINT: If the operation of step (d) does not complete within 5 min., it will return to the normal operation mode. Also, if the number of the registered ID is less than 4 after 5 min. has elapsed, turning on the ignition switch will make the tire pressure warning light light up for 3 sec., go out for 0.5 sec., then up again and remain ON in the normal operation mode. In this case, do the operation again from the start.
When registering to "2nd":
Using the LEXUS hand-held tester, select the registration mode,"2nd".
Forcibly transmit the transmitter IDs for all wheels.
HINT:
The transmitter ID can be transmitted by rapidly reducing the tire inflation pressure.
When rapidly reducing the pressure, loosen the valve core.
Increase or decrease the tire inflation pressure by 20 kPa (0.2 kgf/sq.cm, 2.9 psi) or more within 15 sec. for each tire.
Using the LEXUS hand-held tester, make sure that the number of the registered ID is 4.
HINT: If the operation of step e. does not complete within 5 min., it will return to the normal operation mode. Also, if the number of the registered ID is less than 4 after 5 min. has elapsed, turning on the ignition switch will make the tire pressure warning light light up for 3 sec., go out for 0.5 sec., then up again and remain ON in the normal operation mode. In this case, do the operation again from the start.
Using the LEXUS hand-held tester, check that the last 3 bits of the 4 registered ID codes are different each other.
Setting the inflation pressure of all tires to normal value completes the transmitter ID registration.
NOTE:
This system requires initializing after changing tires or wheels or after rotating the tires.
Be sure to adjust the tire pressure to the specified value before initialization.
|
Tire Size |
Specified Value |
|
P225/55R17 95H |
220 kPa (2.2 kgf/cm2, 32 psi |
|
245/45R18 96W |
230 kPa (2.3 kgf/cm2, 33 psi |
Check and adjust the tire pressure to the specified value.
With the vehicle stopped, turn the ignition switch to the ON position.
Press and hold the tire pressure warning reset switch until the "Pressure Initial" indicator comes on.
HINT: If the "Pressure Initial" indicator does not come on, perform the initialization again. (With the ignition switch off, perform the procedures (b) and (c).)
Drive the vehicle at 19 mph (30 km/h) or more to complete the initialization of the skid control ECU.
Check that the indicator is not displayed after driving the vehicle for approximately 60 minutes.
HINT: If the "Pressure Initial" indicator comes on while the vehicle is being driven, the initialization may have failed. If so, perform the initialization again. (Turn the ignition switch off and retry from step 1-(a).)
After initialization is completed, the skid control ECU monitors the tire pressure by using the wheel speed sensors.
Check and adjust the tire pressure to the specified value.
With the vehicle stopped, turn the ignition switch to the ON position.
Press and hold the tire pressure warning standardization switch until the tire pressure warning lamp blinks 3 times at a 1 second interval.
HINT: If the tire pressure warning lamp does not blink, perform the initialization again. (with the ignition switch off, perform the procedure above starting at step (b).)
Drive the vehicle at 30 km/h (19 mph) or more, to complete the initialization of the skid control ECU. (It takes about 0.5 to 1.0 hour.)
HINT: If the tire pressure warning lamp blinks at 0.25 second intervals while the vehicle is being driven, the initialization may have failed. If so, perform the initialization again. (Turn the ignition switch OFF and retry from step (a).)
After initialization, is completed the skid control ECU monitors the tire pressure. Using the wheel speed sensors.
To verify the system has been initialized check the length of time the tire pressure warning lamp is on after turning the ignition switch to the ON position.
Not initialized: 4 sec.
Initialized: 3 sec.
REGISTER TRANSMITTER ID
NOTE: It is necessary to register the transmitter ID in the tire pressure monitor ECU when replacing the tire pressure monitor valve sub-assy and/or tire pressure monitor ECU.
Set the tire pressure of all wheels to the specified value.
|
Front |
Rear |
Spare |
|
220 kPa (2.2 kgf/cm2, 32 psi) |
220 kPa (2.2 kgf/cm2, 32 psi) |
220 kPa (2.2 kgf/cm2, 32 psi) |
Connect the hand-held tester to DLC3.
Turn the ignition switch to the ON position.
Read and record the transmitter ID by using the DATA LIST.
Select the registration mode "MAIN".
HINT: Select "2nd" when registering in 2nd.
Input the transmitter ID using the hand-held tester and transmit it to the tire pressure monitor ECU.
Check that the transmitter ID registration is completed correctly.
HINT: If the operation of step (d) to (g) does not complete within 5 min., the mode will return to the normal operation mode.
CONFIRMATION OF TRANSMITTER ID REGISTRATION
Set the tire pressure of all wheels to the specified value.
|
Front |
Rear |
Spare |
|
220 kPa (2.2 kgf/cm2, 32 psi) |
220 kPa (2.2 kgf/cm2, 32 psi) |
220 kPa (2.2 kgf/cm2, 32 psi) |
Connect the hand-held tester to DLC3.
Turn the ignition switch to the ON position.
Select the "SIGNAL CHECK" mode on the hand-held tester.
Forcibly transmit the transmitter IDs for all wheels.
HINT:
The transmitter ID can be transmitted by rapidly reducing the tire pressure.
When rapidly reducing the pressure, loosen the valve core.
Check that test mode DTCs C2181/81, C2182/82, C2183/83, C2184/84 and C2185/85 are all erased.
HINT: If they haven't been erased, reset the tire pressure to the specified value and rotate the tire 90 to 270 degrees. Then forcibly transmit the transmitter IDs of all wheels. If they are still output, register the transmitter IDs again.
Set the tire pressure of all wheels to the specified value.
PROCEDURE FOR DETERMINING THE INSTALLED WHEEL'S TRANSMITTER ID STATUS ("MAIN" or "2nd")
Turn the ignition switch to the ON position.
Set the tire pressure warning switch "MAIN" position.
Set the tire pressure of all wheels to the specified value.
|
Front |
Rear |
Spare |
|
220 kPa (2.2 kgf/cm2, 32 psi) |
220 kPa (2.2 kgf/cm2, 32 psi) |
220 kPa (2.2 kgf/cm2, 32 psi) |
Rapidly reduce the pressure of any wheel to 120 kPa (1.2 kgf/sq.cm, 17 psi).
Check the following items. If both of them are true, the transmitter ID of the currently installed wheel is registered in the "MAIN".
Tire pressure warning lamp comes on.
The tire pressure of any tire is 120 kPa (1.2 kgf/sq.cm, 17 psi) when measured with the hand-held tester.
If either of the above conditions is not true, switch the tire pressure warning switch to "2nd" and perform steps (c) to (e). If both are true, the transmitter ID of the currently installed wheel is registered in "2nd".
INITIALIZATION
NOTICE: Initialization is necessary after replacing either the ECU, tires with different tire pressure or tire pressure monitor valve sub-assembly, after rotating the tires, or when a new vehicle is delivered.
Set the tire air pressure for 4 wheels, to the specified value.
Keep the tire pressure warning reset switch pressed for 3 seconds or more with the engine switch ON (IG).
Check that the tire pressure warning light blinks 3 times ( 1 second ON, 1 second OFF ). If the engine is on, "PRESSURE INITIAL" will be displayed on the multi-information display.
HINT:
Do not turn the engine switch off during initialization ( The initialization process takes about 20 minutes ).
Initialization will be completed if signals are received from the wheels. Initialization will be canceled if the engine switch is turned off during initialization.
Confirm that initialization is completed using the intelligent tester.
Check that the pressure for each tires is displayed in INIT THRESHOLD 1 to 4.
Initialization is completed.
INITIALIZATION
NOTICE:
Initialization is necessary after replacing either the ECU, tires with different tire pressure or tire pressure monitor valve sub-assembly, after rotating the tires, or when a new vehicle is delivered.
Perform the tire pressure adjustment after the vehicle has sufficiently cooled down. If the vehicle is not sufficiently cooled down, increase the air pressure by 20 to 30 kPa in addition to the specified value.
Set the tire air pressure for all wheels (including the spare tire) to the specified value.
Keep the tire pressure warning reset switch pressed for 3 seconds or more with the ignition switch ON.
Check that the tire pressure warning light blinks 3 times (1 second ON, 1 second OFF).
HINT:
Do not turn the ignition switch OFF during initialization (the initialization process takes about 10 minutes).
Initialization will be completed if signals are received from all the wheels. Initialization will be canceled if the ignition switch is turned OFF during initialization.
In winter, as the tire pressure may decrease depending on the ambient temperature, increase the air pressure by 20 to 30 kPa above the specified value 10 minutes after the initialization with the ignition switch on.
Confirm that initialization is completed using the intelligent tester.
Check that the pressure for each tires is displayed in INIT THRESHOLD 1 to 5.
Initialization is completed.