Toyota Venza: System Description

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