During test mode, when the tire pressure warning reset switch is on, the tire pressure warning light comes on and when the tire pressure warning reset switch is off, the tire pressure warning light blinks at 0.125 second intervals.

This DTC is used for detecting open circuits and radio wave frequency mismatches in the tire pressure warning antenna.

The tire pressure warning ECU and receiver receives speed signals from the combination meter assembly via CAN communication. This DTC is stored upon entering test mode (signal check mode), and cleared when a vehicle speed signal of 20 km/h (12 mph) is detected for 3 seconds or more. This DTC is output only in test mode (signal check mode).

The tire pressure warning ECU and receiver receives speed signals from the combination meter assembly via CAN communication.

Initialization is necessary if one of the following occurs:

The signals are transmitted to the tire pressure warning ECU and receiver in the vehicle as radio waves.

The IDs of each tire pressure warning valve and transmitter are registered to the tire pressure warning ECU and receiver.

When the ECU detects that a transmitter ID code is not registered in the ECU, this DTC is stored.

The tire pressure warning valve and transmitters that are installed in the tire and wheel assemblies measure the tire pressures. The measured values are transmitted as radio waves to the tire pressure warning antenna and then set to the tire pressure warning ECU and receiver. The ECU compares the measured air pressure values with the air pressure threshold. When the measured air pressure value is less than this threshold, the warning light in the combination meter assembly illuminates.

After all IDs are registered, DTC C2126/26 is stored in the tire pressure warning ECU and receiver and the tire pressure warning light blinks for 1 minute and then illuminates.

When the tire pressure warning ECU and receiver successfully receives radio waves from all the transmitters whose IDs are stored in the ECU, DTC C2126/26 is cleared and the tire pressure warning light goes off.

The tire pressure warning valve and transmitters that are installed in the tire and wheel assemblies measure the tire pressures. The measured values are transmitted as radio waves to the tire pressure warning antenna and then set to the tire pressure warning ECU and receiver. The ECU compares the measured air pressure values with the air pressure threshold. When the measured air pressure value is less than this threshold, the warning light in the combination meter assembly illuminates.