SYSTEM DESCRIPTION
1. DESCRIPTION OF SYSTEM
(a) Each tire pressure warning valve and transmitter is equipped with a tire pressure sensor and a transmitter and is installed in each tire and wheel assembly. The sensor measures the tire pressure. The measured value and transmitter ID are transmitted to the tire pressure warning antenna and receiver on the body as radio waves and then sent to the tire pressure warning ECU from the tire pressure warning antenna and receiver. If the transmitter ID has already been registered, the ECU compares the measured air pressure value with the standard value. When the value is less than the standard value registered in the tire pressure warning ECU, the warning light on the accessory meter comes on.
2. INITIAL CHECK
(a) After the ignition switch is turned to ON, the tire pressure warning light comes on for 3 seconds and then goes off.
HINT:
If the warning light does not come on for 3 seconds, troubleshoot the tire pressure
warning light circuit (See page ).
3. WHEN TIRE PRESSURE WARNING LIGHT IS LIT
(a) When the tire pressure warning light does not go off, or when it comes on while driving, check the tire pressure. If the tire pressure warning light comes on within several hours of adjusting the tire pressure, the tire may have a slow leak.
(b) Under the following conditions, the system may not function properly:
(1) The system will not function properly in the following conditions:
(When the condition becomes normal, the system will work properly.)
(2) The system may not function properly in the following conditions:
(When the condition becomes normal, the system will work properly.)
(c) After removing and installing the ECU or a sensor, check for DTCs.
4. FUNCTION OF COMPONENTS
Component |
Function |
---|---|
Tire pressure warning valve and transmitter |
Combined as a single unit with a tire valve, it measures tire pressure and temperature and transmits an ID number for identification. Has a built-in battery. |
Tire pressure warning antenna and receiver |
Receives signals from the transmitters and transmits them to the tire pressure warning ECU. |
Tire pressure warning ECU |
Receives a signal from the receiver and identifies it as vehicle's own signal. If the measured value is equal to or lower than the specified value, it transmits a signal to illuminate the tire pressure warning light on the accessory meter. |
Tire pressure warning light |
Located in the accessory meter, it informs the driver of low tire pressure and system failures. |
Disassembly
DISASSEMBLY
PROCEDURE
1. REMOVE ULTRASONIC SENSOR CLIP (w/ Intuitive Parking Assist System)
2. REMOVE NO. 1 ULTRASONIC SENSOR (w/ Intuitive Parking Assist System)
3. REMOVE NO. 1 ULTRASONIC SENSOR RETAINER (w/ Intuitive Parking Assist System)
4. ...
Precaution
PRECAUTION
CAUTION:
Replace any faulty seat belt components (outer belt, inner belt, bolts, nuts,
adjustable shoulder anchor, tether anchor hardware and other related parts). When
inspecting a vehicle that was in a collision, be sure to check all of the ...
Emission Control System
Parts Location
PARTS LOCATION
ILLUSTRATION
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT FUEL CUT-OFF RPM
(a) Increase the engine speed to at least 3500 rpm.
(b) Use a sound scope to check for injector operating soun ...