Description
The tire pressure warning valve and transmitter that is installed in the tires and wheels measures the air pressure of the tires. The measured values are transmitted to the tire pressure warning receiver on the body as radio waves and then sent to the tire pressure warning ecu. The ecu compares the measured air pressure values with the air pressure threshold. When the measured air pressure values are less than this threshold, the warning light in the combination meter turns on.
The tire pressure warning ecu stores a dtc when the tire pressure monitor valve stops transmitting signals. At this time, forcibly transmit the signals by releasing the tire pressure rapidly. The stored dtc is cleared when the signal transmission is resumed.
Hint:
It is necessary to perform the procedure to identify the tire pressure monitor valve that is malfunctioning because it cannot be identified by the output dtc.
Wiring diagram
Inspection procedure
Notice:
It is necessary to register an id code after replacing the tire pressure warning antenna and receiver and/or the tire pressure warning ecu (see page tw-9).
Standard pressure: 220 kpa (2.2 Kgf/cm2, 32 psi)
Ok: the tire pressure data displayed on the intelligent tester screen changes with the value of the tire pressure.
Notice:
Standard pressure: 220 kpa (2.2 Kgf/cm2, 32 psi)
Hint:
If the tire pressure data displayed on the intelligent tester screen has not changed after rechecking, go to the troubleshooting procedures of dtcs c2121/ 21 to c2125/25 which indicate transmission or reception malfunctions (see page tw-28).
End
Terminals of ecu
Check occupant classification ecu
Measure the voltage of the connector.
...
Front power seat lumbar switch
Inspection
Inspect front power seat lumbar switch lh
Measure the resistance between the terminals when
the switch is operated.
Standard resistance
If the result is not as specified, replace the switch. ...
Problem symptoms table (2006/01- )
Hint:
Use the table below to help determine the cause of the
problem symptom. The potential causes of the symptoms
are listed in order of probability in the "suspected area"
column of the table. Check each symptom by checking the
suspected areas in the order they are listed. Re ...