* Facilities or devices that use similar radio frequencies are located in the vicinity of the vehicle.
* Devices using similar radio frequencies are used in the vehicle.
* The ID of the tire pressure warning valve and transmitter is mistyped during registration.
* A tire/wheel/transmitter from a different vehicle is installed.
HINT
When no transmitter ID is received from a tire pressure warning valve and transmitter for a total of 20 minutes while the vehicle
speed is more than 8 km/h (5 mph) or no transmitter ID is received from all the tire pressure warning valve and transmitters for a
total of 20 minutes, DTCs will be set.
DTCs from C2121/21 to C2125/25 can be cleared by using the tester or when the tire pressure warning valve and transmitter
sends a normal signal. DTCs from C2181/81 to C2185/85 can be cleared when the transmitter in the tire pressure warning valve
and transmitter sends a forced transmission signal or test mode ends. DTCs from C2181/81 to C2185/85 are output only in test
mode.
NOTICE:
When DTCs C2121/21 to C2125/25 are set, DTC C2173/73 may be set simultaneously. In such cases, troubleshoot C2173/73 first,
then troubleshoot DTCs C2121/21 to C2125/25.
HINT
It is necessary to perform the procedure to identify the tire pressure warning valve and transmitter that is malfunctioning because
it cannot be identified by the output DTC.
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