DTC C2121: No Signal from Transmitter ID1; DTC C2122: No Signal from Transmitter ID2; DTC C2123: No Signal from Transmitter ID3; DTC C2124: No Signal from Transmitter ID4; DTC C2125: No Signal from Transmitter ID5; DTC C2181: Transmitter ID1 not Received (Test Mode DTC); DTC C2182: Transmitter ID2 not Received (Test Mode DTC); DTC C2183: Transmitter ID3 not Received (Test Mode DTC); DTC C2184: Transmitter ID4 not Received (Test Mode DTC); DTC C2185: Transmitter ID5 not Received (Test Mode DTC) [11/2018 - 10/2019]: Description
The tire pressure warning valve and transmitters that are installed in the tire and wheel assemblies measure the tire pressure of each wheel. The measured values are transmitted to the tire pressure warning ECU and receiver in the vehicle as radio waves. The ECU compares the measured tire pressure values with the tire pressure threshold. When the measured tire pressure value is less than this threshold, the warning light in the combination meter assembly illuminates.
The tire pressure warning valve and transmitters constantly send radio waves to the tire pressure warning ECU and receiver.
Under the conditions below, the tire pressure warning ECU and receiver is unable to receive the signals from the tire pressure warning valve and transmitters, and a DTC is stored.
- 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 a tire pressure warning valve and transmitter is mistyped during registration.
- A tire, wheel and/or transmitter from a different vehicle is installed.
HINT:
When no transmitter ID is received from a tire pressure warning valve and transmitter for 20 minutes or more while the vehicle speed is more than 40 km/h (25 mph), or no transmitter ID is received from all of the tire pressure warning valve and transmitters for 20 minutes or more, DTCs from C2121 to C2124 (C2125: w/ Full Size Spare Tire) are stored.
DTCs C2121 to C2124 (C2125: w/ Full Size Spare Tire) can only be cleared by using the Techstream. DTCs C2181 to C2184 (C2185: w/ Full Size Spare Tire) can be cleared when the tire pressure warning valve and transmitter sends a forced transmission signal or test mode ends. DTCs C2181 to C2184 (C2185: w/ Full Size Spare Tire) are output only in test mode.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
|---|---|---|---|---|
| C2121 | No Signal from Transmitter ID1 | Either of the following conditions (a) or (b) is met: (a) When all conditions below are met:
(b) When both conditions below are met:
|
|
- |
| C2122 | No Signal from Transmitter ID2 | Either of the following conditions (a) or (b) is met: (a) When all conditions below are met:
(b) When both conditions below are met:
|
|
- |
| C2123 | No Signal from Transmitter ID3 | Either of the following conditions (a) or (b) is met: (a) When all conditions below are met:
(b) When both conditions below are met:
|
|
- |
| C2124 | No Signal from Transmitter ID4 | Either of the following conditions (a) or (b) is met: (a) When all conditions below are met:
(b) When both conditions below are met:
|
|
- |
| C2125 | No Signal from Transmitter ID5 | Either of the following conditions (a) or (b) is met: (a) When all conditions below are met:
(b) When both conditions below are met:
|
|
w/ Full Size Spare Tire |
| C2181 | Transmitter ID1 not Received (Test Mode DTC) | Test mode procedure is performed. |
|
- |
| C2182 | Transmitter ID2 not Received (Test Mode DTC) | Test mode procedure is performed. |
|
- |
| C2183 | Transmitter ID3 not Received (Test Mode DTC) | Test mode procedure is performed. |
|
- |
| C2184 | Transmitter ID4 not Received (Test Mode DTC) | Test mode procedure is performed. |
|
- |
| C2185 | Transmitter ID5 not Received (Test Mode DTC) | Test mode procedure is performed. |
|
w/ Full Size Spare Tire |
| Vehicle Condition | ||||
|---|---|---|---|---|
| Pattern 1 | Pattern 2 | Pattern 3 | ||
| Diagnosis Condition | Tire pressure warning valve and transmitter is not in stop mode. | ◦ | ◦ | ◦ |
| Vehicle speed is more than 40 km/h (25 mph). | ◦ | - | - | |
| No vehicle speed signal is received. | - | ◦ | - | |
| Malfunction Status | Any transmitter ID is not received from tire pressure warning valve and transmitters. | ◦ | ◦ | - |
| No transmitter ID is received from tire pressure warning valve and transmitters. | - | - | ◦ | |
| Detection Time | 20 minutes or more | 20 minutes or more | 20 minutes or more | |
| Number of Trips | - | - | - | |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.
| Vehicle Condition | ||||
|---|---|---|---|---|
| Pattern 1 | Pattern 2 | Pattern 3 | ||
| Diagnosis Condition | Tire pressure warning valve and transmitter is not in stop mode. | ◦ | ◦ | ◦ |
| Vehicle speed is more than 40 km/h (25 mph). | ◦ | - | - | |
| No vehicle speed signal is received. | - | ◦ | - | |
| Malfunction Status | Any transmitter ID is not received from tire pressure warning valve and transmitters. | ◦ | ◦ | - |
| No transmitter ID is received from tire pressure warning valve and transmitters. | - | - | ◦ | |
| Detection Time | 20 minutes or more | 20 minutes or more | 20 minutes or more | |
| Number of Trips | - | - | - | |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.
| Vehicle Condition | ||||
|---|---|---|---|---|
| Pattern 1 | Pattern 2 | Pattern 3 | ||
| Diagnosis Condition | Tire pressure warning valve and transmitter is not in stop mode. | ◦ | ◦ | ◦ |
| Vehicle speed is more than 40 km/h (25 mph). | ◦ | - | - | |
| No vehicle speed signal is received. | - | ◦ | - | |
| Malfunction Status | Any transmitter ID is not received from tire pressure warning valve and transmitters. | ◦ | ◦ | - |
| No transmitter ID is received from tire pressure warning valve and transmitters. | - | - | ◦ | |
| Detection Time | 20 minutes or more | 20 minutes or more | 20 minutes or more | |
| Number of Trips | - | - | - | |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.
| Vehicle Condition | ||||
|---|---|---|---|---|
| Pattern 1 | Pattern 2 | Pattern 3 | ||
| Diagnosis Condition | Tire pressure warning valve and transmitter is not in stop mode. | ◦ | ◦ | ◦ |
| Vehicle speed is more than 40 km/h (25 mph). | ◦ | - | - | |
| No vehicle speed signal is received. | - | ◦ | - | |
| Malfunction Status | Any transmitter ID is not received from tire pressure warning valve and transmitters. | ◦ | ◦ | - |
| No transmitter ID is received from tire pressure warning valve and transmitters. | - | - | ◦ | |
| Detection Time | 20 minutes or more | 20 minutes or more | 20 minutes or more | |
| Number of Trips | - | - | - | |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.
| Vehicle Condition | ||||
|---|---|---|---|---|
| Pattern 1 | Pattern 2 | Pattern 3 | ||
| Diagnosis Condition | Tire pressure warning valve and transmitter is not in stop mode. | ◦ | ◦ | ◦ |
| Vehicle speed is more than 40 km/h (25 mph). | ◦ | - | - | |
| No vehicle speed signal is received. | - | ◦ | - | |
| Malfunction Status | Any transmitter ID is not received from tire pressure warning valve and transmitters. | ◦ | ◦ | - |
| No transmitter ID is received from tire pressure warning valve and transmitters. | - | - | ◦ | |
| Detection Time | 20 minutes or more | 20 minutes or more | 20 minutes or more | |
| Number of Trips | - | - | - | |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.
- w/ ID Switching Function:
(Main) is displayed on the DTC screen for the DTCs even when the 2nd set of tires is selected.
- When DTCs C2121 to C2124 (C2125: w/ Full Size Spare Tire) are set, DTC C2179 may be set simultaneously. In such cases, troubleshoot DTCs C2121 to C2124 (C2125: w/ Full Size Spare Tire) first, then troubleshoot DTC C2179.
- If the Techstream is used to display the Data List for 10 minutes or more, the tire pressure warning ECU stores DTCs C2121 to C2124 (C2125: w/ Full Size Spare Tire). If these DTCs are stored, clear the DTCs using the Techstream.
- w/o Full Size Spare Tire:
If any DTC from C2121 to C2124 is output, clear the DTCs or drive the vehicle at 40 km/h (25 mph) for 1 minute or more after repairing the malfunctions.
- w/ Full Size Spare Tire:
If any DTC from C2121 to C2125 is output, clear the DTCs after repairing the malfunctions.
HINT:
It is necessary to perform the following procedure to identify the tire pressure warning valve and transmitter that is malfunctioning because it cannot be identified by the output DTC.