DTC Code | DTC Name |
---|---|
C2121/21 | No Signal from Transmitter ID1 |
C2122/22 | No Signal from Transmitter ID2 |
C2123/23 | No Signal from Transmitter ID3 |
C2124/24 | No Signal from Transmitter ID4 |
C2125/25 | No Signal from Transmitter ID5 |
C2181/81 | Transmitter ID1 not Received (Test Mode DTC) |
C2182/82 | Transmitter ID2 not Received (Test Mode DTC) |
C2183/83 | Transmitter ID3 not Received (Test Mode DTC) |
C2184/84 | Transmitter ID4 not Received (Test Mode DTC) |
C2185/85 | Transmitter ID5 not Received (Test Mode DTC) |
DESCRIPTION
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 to the tire pressure warning ECU and receiver in the vehicle as radio waves. 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.
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.
Tech Tips
When no transmitter ID is received from a tire pressure warning valve and transmitter for a total of 20 minutes*1 (10 minutes*2) while the vehicle speed is more than 37 km/h (23 mph), or no transmitter ID is received from all the tire pressure warning valve and transmitters for a total of 20 minutes*1 (10 minutes*2), these DTCs are set.
DTCs from C2121/21 to C2124/24 (C2121/21 to C2125/25: w/ Full Size Spare Tire) can only be cleared by using the GTS. DTCs from C2181/81 to C2184/84 (C2181/81 to C2185/85: 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 from C2181/81 to C2184/84 (C2181/81 to C2185/85: w/ Full Size Spare Tire) are output only in test mode.
*1: for FMVSS138 Type
*2: for ECE-R64 Type
DTC No. | DTC Detection Condition | Trouble Area |
---|---|---|
C2121/21 C2122/22 C2123/23 C2124/24 C2125/25 |
Following condition (a) or (b) is met: (a) When all conditions below are met:
(b) When both conditions below are met:
|
|
C2181/81 C2182/82 C2183/83 C2184/84 C2185/85 |
Test mode procedure is performed. |
|
*1: for FMVSS138 Type
*2: for ECE-R64 Type
Note
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 C2121/21 to C2124/24 (C2121/21 to C2125/25: w/ Full Size Spare Tire) are set, DTC C2179/79 may be set simultaneously. In such cases, troubleshoot DTCs C2121/21 to C2124/24 (C2121/21 to C2125/25: w/ Full Size Spare Tire) first, then troubleshoot DTC C2179/79.
Tech Tips
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.
WIRING DIAGRAM
INSPECTION PROCEDURE
Note
When replacing the tire pressure warning ECU and receiver, read the transmitter IDs stored in the old ECU using the GTS and write them down before removal.
It is necessary to perform initialization Click here after registration Click here of the transmitter IDs into the tire pressure warning ECU and receiver if the ECU and/or one of the valve and transmitters has been replaced.
PROCEDURE
CHECK FREQUENCY RECEIVING CONDITION
Check that the vehicle is not located in an area such as described below:
Facilities or devices that use similar radio frequencies are located in the vicinity of the vehicle.
Tech Tips
If the vehicle is located in an area such as the one described above, the tire pressure warning light may come on only in a particular area.
Devices using similar radio frequencies are used in the vehicle.
OK |
---|
Facilities, or devices that use similar radio frequencies are not located in the vicinity of the vehicle. |
Tech Tips
Radio transmissions may be interrupted due to the surroundings or devices installed by the user.
NG |
CHECK IF ANY DEVICE IS INSTALLED BY USER |
OK |
IDENTIFY TRANSMITTER CORRESPONDING TO DTC
Set the tire pressure to the specified values Click here.
Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Chassis / Tire Pressure Monitor / Data List.
Check the values by referring to the table below.
Tester Display | Measurement Item/Range | Normal Condition | Diagnostic Note |
---|---|---|---|
ID 1 Tire Inflation Pressure | ID1 tire inflation pressure/ min.: Absolute pressure / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure / 380 kPa (3.9 kgf/cm2, 55 psi) |
Actual tire inflation pressure | If N/A is displayed, data has not been received.*1 |
ID 2 Tire Inflation Pressure | ID2 tire inflation pressure/ min.: Absolute pressure / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure / 380 kPa (3.9 kgf/cm2, 55 psi) |
Actual tire inflation pressure | If N/A is displayed, data has not been received.*1 |
ID 3 Tire Inflation Pressure | ID3 tire inflation pressure/ min.: Absolute pressure / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure / 380 kPa (3.9 kgf/cm2, 55 psi) |
Actual tire inflation pressure | If N/A is displayed, data has not been received.*1 |
ID 4 Tire Inflation Pressure | ID4 tire inflation pressure/ min.: Absolute pressure / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure / 380 kPa (3.9 kgf/cm2, 55 psi) |
Actual tire inflation pressure | If N/A is displayed, data has not been received.*1 |
ID 5 Tire Inflation Pressure*2 | ID5 tire inflation pressure/ min.: Absolute pressure / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure / 380 kPa (3.9 kgf/cm2, 55 psi) |
Actual tire inflation pressure | If N/A is displayed, data has not been received.*1 |
Tech Tips
*1: It may take a few minutes until the values are displayed.
*2: w/ Full Size Spare Tire
The wheel position cannot be determined from ID1 through ID4 or ID1 through ID5 (w/ Full Size Spare Tire) on the Data List.
Rapidly reduce the tire pressure for each wheel at least 40 kPa (0.4 kg/cm2, 5.8 psi) within 30 seconds.
Check the Data List.
Note
It may take a few minutes to display the updated tire pressure data.
When the "ID Tire Inflation Pressure" data has not changed, reset the tire pressure to the appropriate specified value and rotate the tire 90 to 270 degrees. Then rapidly release the tire pressure and recheck the data.
Record the transmitter ID of which "ID Tire Inflation Pressure" data corresponds to each tire.
After confirming that the "ID Tire Inflation Pressure" data for one tire has changed, repeat this procedure one by one. Identify the transmitter that corresponds to the DTC.
Result | ||||||
---|---|---|---|---|---|---|
|
B |
END |
A |
CHECK TRANSMITTER ID
Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Chassis / Tire Pressure Monitor / Data List.
Check the values by referring to the table below.
Tester Display | Measurement Item/Range | Normal Condition | Diagnostic Note |
---|---|---|---|
Registered ID 1 code | Registered ID1 code/ min.: 0 max.: FFFFFFF*1 |
ID No. registered for transmitter ID1 displayed | - |
Registered ID 2 code | Registered ID2 code/ min.: 0 max.: FFFFFFF*1 |
ID No. registered for transmitter ID2 displayed | - |
Registered ID 3 code | Registered ID3 code/ min.: 0 max.: FFFFFFF*1 |
ID No. registered for transmitter ID3 displayed | - |
Registered ID 4 code | Registered ID4 code/ min.: 0 max.: FFFFFFF*1 |
ID No. registered for transmitter ID4 displayed | - |
Registered ID 5 code*2 | Registered ID5 code/ min.: 0 max.: FFFFFFF*1 |
ID No. registered for transmitter ID5 displayed | - |
Tech Tips
*1: Displayed only when the ID No. is not registered.
*2: w/ Full Size Spare Tire
The wheel position cannot be determined from ID1 through ID4 or ID1 through ID5 (w/ Full Size Spare Tire) on the Data List.
Check the ID number on the identified transmitter by removing it from the tire and wheel.
*1 | Tire pressure warning valve and transmitter | *2 | Transmitter ID (7-digit number) |
Confirm that the ID number on the transmitter and recorded transmitter ID match.
Result | ||||||
---|---|---|---|---|---|---|
|
B |
REGISTRATION OF TRANSMITTER ID Click here |
A |
REPLACE TIRE PRESSURE WARNING VALVE AND TRANSMITTER
Replace the tire pressure warning valve and transmitter Click here.
NEXT |
REGISTRATION OF TRANSMITTER ID
Perform registration Click here.
NEXT |
PERFORM INITIALIZATION
Perform initialization Click here.
NEXT |
CONFIRM TIRE INFLATION PRESSURE (DATA LIST)
Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Chassis / Tire Pressure Monitor / Data List.
Check the values by referring to the table below.
Tester Display | Measurement Item/Range | Normal Condition | Diagnostic Note |
---|---|---|---|
ID 1 Tire Inflation Pressure | ID1 tire inflation pressure/ min.: Absolute pressure / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure / 380 kPa (3.9 kgf/cm2, 55 psi) |
Actual tire inflation pressure | If N/A is displayed, data has not been received.*1 |
ID 2 Tire Inflation Pressure | ID2 tire inflation pressure/ min.: Absolute pressure / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure / 380 kPa (3.9 kgf/cm2, 55 psi) |
Actual tire inflation pressure | If N/A is displayed, data has not been received.*1 |
ID 3 Tire Inflation Pressure | ID3 tire inflation pressure/ min.: Absolute pressure / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure / 380 kPa (3.9 kgf/cm2, 55 psi) |
Actual tire inflation pressure | If N/A is displayed, data has not been received.*1 |
ID 4 Tire Inflation Pressure | ID4 tire inflation pressure/ min.: Absolute pressure / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure / 380 kPa (3.9 kgf/cm2, 55 psi) |
Actual tire inflation pressure | If N/A is displayed, data has not been received.*1 |
ID 5 Tire Inflation Pressure*2 | ID5 tire inflation pressure/ min.: Absolute pressure / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure / 380 kPa (3.9 kgf/cm2, 55 psi) |
Actual tire inflation pressure | If N/A is displayed, data has not been received.*1 |
Tech Tips
*1: It may take a few minutes until the values are displayed.
*2: w/ Full Size Spare Tire
When no "ID Tire Inflation Pressure" data has changed, reset the tire pressure to the appropriate specified value and rotate the tire 90 to 270 degrees. Then rapidly release the tire pressure and recheck the data.
The wheel position cannot be determined from ID1 through ID4 or ID1 through ID5 (w/ Full Size Spare Tire) on the Data List.
Result | ||||||||
---|---|---|---|---|---|---|---|---|
|
B |
REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER Click here |
C |
END |
A |
REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER Click here