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
How to proceed with troubleshooting
Hint:
Use these procedures to troubleshoot the key reminder
warning system.
*: Use the intelligent tester.
Vehicle brought to workshop
Inspect battery voltage
Standard voltage:
11 to 14 v
Hint:
If the voltage is below 11 v, recharge or replace the battery
before proceedi ...
Customize parameters
Customizing function with intelligent
tester (reference)
Hint:
The following item can be customized.
Notice:
When the customer requests a change in a
function, first make sure that the function can be
customized.
Make a note of the current settings before
customizing.
When tr ...
Low battery positive voltage
Description
When there is an abnormality in the power supply circuit of the brake
actuator (skid control ecu), the skid
control ecu sets a dtc and the operation is prohibited by the fail-safe
function. This dtc is set when the
voltage supplied to terminal ig1 is outside the dtc detection ...