Mechanics

TIRE PRESSURE RESET SWITCH

2006 Lexus GS 300

Tires and Wheels problem
2006 Lexus GS 300 6 cyl Two Wheel Drive Automatic 80789 miles

bought new tires cant reset tire warning lights smitch not where manual said? Manual gives two location under glove box or under streing cloum but no switch ether location
AD
Avatar
George salgado
March 21, 2010.



TIRE PRESSURE MONITOR WARNING INDICATORS
NOTE: The tire pressure warning light may turn on due to natural causes such as natural air leaks or tire pressure changes caused by temperature. In this case, adjusting the tire pressure will turn off the warning light.

When the tire pressure warning light and message do not go off, or when they come on during driving, check tire pressure and adjust as necessary. Warning indicators should turn off a few minutes after air is put into a deflated tire. If the warning indicators are still on even though the tire pressure is correctly adjusted, the tire could be punctured. Repair as necessary. If the tire pressure warning indicators come on within several hours after adjusting the tire pressure, the tire may have a slow air leak.
If the tire pressure warning light is blinking even after adjusting the tire pressure, selection of the tire pressure selector switch " MAIN" /" 2nd" may be incorrect. See DETERMINING INSTALLED WHEEL'S TRANSMITTER ID STATUS (" MAIN" OR " 2ND" ) under TIRE PRESSURE SENSOR REGISTRATION. If the warning light is still on or blinking, there is a malfunction in the TPM system. See appropriate manufacturer service information.
Under the following conditions, the system may not function properly: The areas, facilities or devices that use similar radio wave frequencies are located in the vicinity of the vehicle.
A radio device of similar frequency is used in or near the vehicle.
A lot of snow or ice is stuck to the vehicle, especially the wheels and around the wheel houses.
The battery of the sensor has been depleted.
A tire without tire pressure monitor valve sub-assembly is used.
Snow tires or tire chains are used.
The spare tire is in use.
If any other wheels than the specified ones are used, the system may not function properly because the radio waves are differently transmitted from the tire pressure sensor.
Depending on the tire type, the system may not function properly even though the specified wheels are used.
Although tires with tire pressure sensors are used, the selector switch is set to the other tire setting.
NOTE: When the tires whose ID code is registered at " MAIN" are used, the system does not work properly with the selector switch set at " 2nd". If the tires whose ID code is registered at " 2nd" are stored nearby, the system will detect their tire pressure (and vice versa).

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: When initializing the system, the present tire condition is stored as a standard.

During initialization, the tire pressure monitor valve sub-assembly 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.
The initialization process is canceled if the engine switch is turned off during initialization. To initialize again, the tire pressure warning reset switch must be pressed again. For this reason, once the tire pressure warning reset switch has been pressed, turning engine off is not recommended for a minimum of 20 minutes.
Set the tire pressure of all wheels to pressure specified on the tire and loading information label.
With the vehicle stopped and parking brake applied, turn the engine switch on (IG).
Press and hold the tire pressure warning reset switch until the tire pressure warning light blinks 3 times at one-second intervals and " PRESSURE INITIAL" is shown on the multi-information display. See Fig. 2.
NOTE: Do not turn the engine off during initialization (the initialization process takes about 20 minutes). Initialization will be complete if signals are received from all 4 wheels. Initialization will be canceled if the engine switch is turned off during initialization.

Confirm that initialization is complete using the intelligent tester. Check that the pressure for each tire is displayed in INIT THRESHOLD 1 to 4.
Fig. 2: Initializing TPM System
Courtesy of TOYOTA MOTOR SALES, U.S.A, INC.
TIRE PRESSURE SENSOR REGISTRATION
NOTE: If the tire pressure sensor and/or tire pressure monitor ECU are replaced, the transmitter ID needs to be registered in the tire pressure monitor ECU prior to system initialization. To perform this procedure, the Toyota intelligent tester must be used. It is not necessary to register the sensor IDs when only tire rotation is performed.

Register Transmitter ID
Set the tire pressure of all wheels to pressure specified on the tire and loading information label.
Connect the intelligent tester to DLC3 (located under the steering column).
With the vehicle stopped and parking brake applied, turn the engine switch on (IG).
Read and record the transmitter IDs (ID1 to ID4) by using the DATA LIST. See Fig. 3 and Fig. 4.
Select the " REGIST TIRE" mode.
Select the " MAIN" registration mode (or select " 2nd" when registering in 2nd).
Input the transmitter IDs (ID1 to ID4) using the intelligent tester and transmit it to the tire pressure monitor ECU.
Set the ID transmission condition to " SUCCEEDED".
NOTE: If steps 4-8 are not completed within 5 minutes, system will return to the normal operation mode.

Disconnect the intelligent tester with the engine switch off.
Fig. 3: Registering Transmitter ID Using Intelligent Tester (1 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A, INC.
Fig. 4: Registering Transmitter ID Using Intelligent Tester (2 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A, INC.
Confirmation Of Transmitter ID Registration
Set the tire pressure of all wheels to the specified value.
Connect the intelligent tester to DLC3.
With the vehicle stopped and parking brake applied, turn the engine switch on (IG).
Select " SIGNAL CHECK" mode on the intelligent tester.
Forcibly transmit the transmitter IDs for all wheels by rapidly reducing tire air pressure (above 20 kPa/15 sec.). When rapidly reducing the pressure, remove the valve core. Perform this step to all tires.
Check that test mode Diagnostic Trouble Codes (DTCs) C2181/81, C2182/82, C2183/83 and C2184/84 are all erased. The transmitter ID registration is complete when the test mode DTCs are erased. If they haven't been erased, reset the tire pressure to the specified value and rotate the tire 90-270 degrees. Then forcibly transmit the transmitter IDs of all wheels. If they are still output, register the transmitter IDs.
Set the tire pressure of all wheels to the specified value.
Determining Installed Wheel's Transmitter ID Status (" MAIN" or " 2nd" ) (Except 2007 GS 430 & 2008 GS 460)
With the vehicle stopped and parking brake applied, turn the engine switch on (IG).
Set the tire pressure warning selector switch to " MAIN" position.
Set the tire pressure of all wheels to the specified value.
Rapidly reduce the pressure of any tire to 17 psi (120 kPa).
Check for 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 light comes on.
The tire pressure of any tire is 17 psi (120 kPa) when measured with the intelligent tester.
If either of the above conditions is not true, switch the tire pressure warning selector switch to " 2nd". Perform steps 3-5. If both conditions are now true, the transmitter ID of the currently installed wheel is registered in " 2nd".

Dave H
Mar 30, 2010.


AD