- Tire pressure warning valve and transmitter is not in stop mode
- Signal is not received from tire pressure warning valve and transmitter when driving the vehicle at more than 8 km/h (5 mph) for 20 minutes or more
| Last Modified: 11-29-2007 | 1.6 C | |
| Service Category: Suspension | Section: Tire Pressure Monitoring | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000000ZUQ02XX |
| Title: TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
DTC |
C2121/21 |
No Signal from Transmitter ID1 |
|
DTC |
C2122/22 |
No Signal from Transmitter ID2 |
|
DTC |
C2123/23 |
No Signal from Transmitter ID3 |
|
DTC |
C2124/24 |
No Signal from Transmitter ID4 |
|
DTC |
C2181/81 |
Transmitter ID1 not Received (Test Mode DTC) |
|
DTC |
C2182/82 |
Transmitter ID2 not Received (Test Mode DTC) |
|
DTC |
C2183/83 |
Transmitter ID3 not Received (Test Mode DTC) |
|
DTC |
C2184/84 |
Transmitter ID4 not Received (Test Mode DTC) |
DESCRIPTION
The tire pressure warning valves and transmitters that are installed in the tire and wheel assemblies measure the air pressure of the tires. The measured values are transmitted to the tire pressure warning antenna and 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 value is less than this threshold, the warning light in the combination meter turns on.
The tire pressure warning valves and transmitters constantly send radio waves to the tire pressure warning antenna and receiver.
Under the conditions below, the tire pressure warning antenna and receiver is unable to receive the signals from the tire pressure warning valves 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 the tire pressure warning valve and transmitter is mistyped during registration.
- A tire/wheel/transmitter from a different vehicle is installed.
- The parts, such as tire chains, window film which obstruct the radio signal of the tire pressure warning valve and transmitter.
HINT:
These DTCs are detected when the vehicle is driven and no signals are received for 20 minutes or more.
DTCs from C2121/21 to C2124/24 can only be cleared by using the Techstream or receiving the signal from the tire pressure warning valve and transmitter. DTCs from C2181/81 to C2184/84 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 C2184/84 are output only in test mode.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
C2121/21 C2122/22 C2123/23 C2124/24 |
When all conditions below are met: |
|
|
C2181/81 C2182/82 C2183/83 C2184/84 |
Test mode procedure is performed. |
|
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.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
- When replacing the tire pressure warning ECU, read the IDs stored in the old ECU using the Techstream and write them down before removal.
-
It is necessary to perform initialization
after registration
of the transmitter IDs into the tire pressure warning ECU after the ECU and/or the tire pressure warning valve and transmitter has been replaced.
PROCEDURE
|
1. |
READ OUTPUT DTC (DTC C2174/74) |
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON and turn the Techstream on.
(d) Enter the following menus: Chassis / Tire Pressure Monitor / Trouble Codes.
(e) Read DTCs.
Result
|
Result |
Proceed to |
|---|---|
|
DTC C2174/74 is not output |
A |
|
DTC C2174/74 is output |
B |
NOTICE:
When DTC C2174/74 is output, troubleshoot that DTC first. Then troubleshoot DTCs C2121/21 to C2124/24.
|
|
2. |
CHECK FREQUENCY RECEIVING CONDITION |
(a) Check if the vehicle is in conditions such as the ones described below:
(1) Facilities or devices that use similar radio frequencies are located in the vicinity of the vehicle.
HINT:
If the vehicle is located in areas described above, the tire pressure warning light may blink for a minute and turn on in a particular area.
(2) 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.
HINT:
Radio frequency may be interrupted due to surroundings or devices installed by the user.
|
|
3. |
IDENTIFY TRANSMITTER CORRESPONDING TO DTC |
(a) Set the tire pressure to the appropriate specified values
.
(b) Turn the ignition switch off.
(c) Connect the Techstream to the DLC3.
(d) Turn the ignition switch to ON and turn the Techstream on.
(e) Enter the following menus: Chassis / Tire Pressure Monitor / Data List.
(f) Check the values by referring to the table below.
Tire Pressure Monitor
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
ID1 Tire Inflation Pressure |
ID1 tire inflation pressure / min.: Absolute pressure / 100 kPa (1 kgf/cm2, 14 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 449.35 kPa (4.6 kgf/cm2, 65 psi), Relative pressure / 349.35 kPa (3.6 kgf/cm2, 51 psi) |
Actual tire inflation pressure |
If 100 kPa (1 kgf/cm2, 14 psi) is displayed for absolute pressure or 0 kPa (0 kgf/cm2, 0 psi) is displayed for relative pressure, data has not been received*. |
|
ID2 Tire Inflation Pressure |
ID2 tire inflation pressure / min.: Absolute pressure / 100 kPa (1 kgf/cm2, 14 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 449.35 kPa (4.6 kgf/cm2, 65 psi), Relative pressure / 349.35 kPa (3.6 kgf/cm2, 51 psi) |
Actual tire inflation pressure |
If 100 kPa (1 kgf/cm2, 14 psi) is displayed for absolute pressure or 0 kPa (0 kgf/cm2, 0 psi) is displayed for relative pressure, data has not been received*. |
|
ID3 Tire Inflation Pressure |
ID3 tire inflation pressure / min.: Absolute pressure / 100 kPa (1 kgf/cm2, 14 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 449.35 kPa (4.6 kgf/cm2, 65 psi), Relative pressure / 349.35 kPa (3.6 kgf/cm2, 51 psi) |
Actual tire inflation pressure |
If 100 kPa (1 kgf/cm2, 14 psi) is displayed for absolute pressure or 0 kPa (0 kgf/cm2, 0 psi) is displayed for relative pressure, data has not been received*. |
|
ID4 Tire Inflation Pressure |
ID4 tire inflation pressure / min.: Absolute pressure / 100 kPa (1 kgf/cm2, 14 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 449.35 kPa (4.6 kgf/cm2, 65 psi), Relative pressure / 349.35 kPa (3.6 kgf/cm2, 51 psi) |
Actual tire inflation pressure |
If 100 kPa (1 kgf/cm2, 14 psi) is displayed for absolute pressure or 0 kPa (0 kgf/cm2, 0 psi) is displayed for relative pressure, data has not been received*. |
HINT:
*: It may take about 5 to 6 minutes until the values are displayed.
(g) Rapidly reduce the tire pressure for each wheel at least 40 kPa (0.4 kgf/cm2, 5.8 psi) within 30 seconds.
(h) Check the Data List.
NOTICE:
- It may take about 5 to 6 minutes to display the updated tire pressure data.
- 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°. Then rapidly release the tire pressure and recheck it.
- Record the "ID Tire Inflation Pressure" data transmitter ID that corresponds to each tire.
(i) After confirming that the "ID Tire Inflation Pressure" data for one tire (ID1 to ID4) has changed, repeat this procedure for the other tires. Identify the transmitter that corresponds to the DTC.
Result
|
Result |
Proceed to |
|---|---|
|
All abnormal |
A |
|
One or more transmitters are abnormal |
B |
|
All normal |
C |
|
|
4. |
CHECK HARNESS AND CONNECTOR (ECU - RECEIVER) |
(a) Disconnect the H40 ECU connector.
(b) Disconnect the O14 receiver connector.
|
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
|
5. |
CHECK TRANSMITTER ID |
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON and turn the Techstream on.
(d) Enter the following menus: Chassis / Tire Pressure Monitor / Data List.
(e) Check the values by referring to the table below.
Tire Pressure Monitor
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
ID1 Tire Inflation Pressure |
ID1 tire inflation pressure / min.: Absolute pressure / 100 kPa (1 kgf/cm2, 14 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 449.35 kPa (4.6 kgf/cm2, 65 psi), Relative pressure / 349.35 kPa (3.6 kgf/cm2, 51 psi) |
Actual tire inflation pressure |
If 100 kPa (1 kgf/cm2, 14 psi) is displayed for absolute pressure or 0 kPa (0 kgf/cm2, 0 psi) is displayed for relative pressure, data has not been received*. |
|
ID2 Tire Inflation Pressure |
ID2 tire inflation pressure / min.: Absolute pressure / 100 kPa (1 kgf/cm2, 14 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 449.35 kPa (4.6 kgf/cm2, 65 psi), Relative pressure / 349.35 kPa (3.6 kgf/cm2, 51 psi) |
Actual tire inflation pressure |
If 100 kPa (1 kgf/cm2, 14 psi) is displayed for absolute pressure or 0 kPa (0 kgf/cm2, 0 psi) is displayed for relative pressure, data has not been received*. |
|
ID3 Tire Inflation Pressure |
ID3 tire inflation pressure / min.: Absolute pressure / 100 kPa (1 kgf/cm2, 14 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 449.35 kPa (4.6 kgf/cm2, 65 psi), Relative pressure / 349.35 kPa (3.6 kgf/cm2, 51 psi) |
Actual tire inflation pressure |
If 100 kPa (1 kgf/cm2, 14 psi) is displayed for absolute pressure or 0 kPa (0 kgf/cm2, 0 psi) is displayed for relative pressure, data has not been received*. |
|
ID4 Tire Inflation Pressure |
ID4 tire inflation pressure / min.: Absolute pressure / 100 kPa (1 kgf/cm2, 14 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 449.35 kPa (4.6 kgf/cm2, 65 psi), Relative pressure / 349.35 kPa (3.6 kgf/cm2, 51 psi) |
Actual tire inflation pressure |
If 100 kPa (1 kgf/cm2, 14 psi) is displayed for absolute pressure or 0 kPa (0 kgf/cm2, 0 psi) is displayed for relative pressure, data has not been received*. |
(f) Check the transmitter ID on the identified transmitter by removing it from the tire and wheel.
(g) Confirm that the transmitter ID on the transmitter and recorded transmitter ID match.
Result
|
Result |
Proceed to |
|---|---|
|
Match |
A |
|
Do not match |
B |
|
|
6. |
REPLACE TIRE PRESSURE WARNING VALVE AND TRANSMITTER |
(a) Replace the tire pressure warning valve and transmitter
.
|
|
7. |
PERFORM REGISTRATION OF TRANSMITTER ID |
(a) Perform registration
.
|
|
8. |
PERFORM INITIALIZATION |
(a) Perform initialization
.
|
|
9. |
CONFIRM TIRE INFLATION PRESSURE (DATA LIST) |
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON and turn the Techstream on.
(d) Enter the following menus: Chassis / Tire Pressure Monitor / Data List.
(e) Check the values by referring to the table below.
Tire Pressure Monitor
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
ID1 Tire Inflation Pressure |
ID1 tire inflation pressure / min.: Absolute pressure / 100 kPa (1 kgf/cm2, 14 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 449.35 kPa (4.6 kgf/cm2, 65 psi), Relative pressure / 349.35 kPa (3.6 kgf/cm2, 51 psi) |
Actual tire inflation pressure |
If 100 kPa (1 kgf/cm2, 14 psi) is displayed for absolute pressure or 0 kPa (0 kgf/cm2, 0 psi) is displayed for relative pressure, data has not been received*. |
|
ID2 Tire Inflation Pressure |
ID2 tire inflation pressure / min.: Absolute pressure / 100 kPa (1 kgf/cm2, 14 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 449.35 kPa (4.6 kgf/cm2, 65 psi), Relative pressure / 349.35 kPa (3.6 kgf/cm2, 51 psi) |
Actual tire inflation pressure |
If 100 kPa (1 kgf/cm2, 14 psi) is displayed for absolute pressure or 0 kPa (0 kgf/cm2, 0 psi) is displayed for relative pressure, data has not been received*. |
|
ID3 Tire Inflation Pressure |
ID3 tire inflation pressure / min.: Absolute pressure / 100 kPa (1 kgf/cm2, 14 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 449.35 kPa (4.6 kgf/cm2, 65 psi), Relative pressure / 349.35 kPa (3.6 kgf/cm2, 51 psi) |
Actual tire inflation pressure |
If 100 kPa (1 kgf/cm2, 14 psi) is displayed for absolute pressure or 0 kPa (0 kgf/cm2, 0 psi) is displayed for relative pressure, data has not been received*. |
|
ID4 Tire Inflation Pressure |
ID4 tire inflation pressure / min.: Absolute pressure / 100 kPa (1 kgf/cm2, 14 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 449.35 kPa (4.6 kgf/cm2, 65 psi), Relative pressure / 349.35 kPa (3.6 kgf/cm2, 51 psi) |
Actual tire inflation pressure |
If 100 kPa (1 kgf/cm2, 14 psi) is displayed for absolute pressure or 0 kPa (0 kgf/cm2, 0 psi) is displayed for relative pressure, data has not been received*. |
HINT:
- *: It may take about 5 to 6 minutes until the values are displayed.
- When no "ID Tire Inflation Pressure" has changed, rotate the tire 90 to 270°. Then recheck it.
Result
|
Result |
Proceed to |
|---|---|
|
Tire pressure values are not displayed. |
A |
|
All tire pressure readings are equal to specified values. |
B |
|
|
10. |
REPLACE TIRE PRESSURE WARNING ANTENNA AND RECEIVER |
(a) Replace the tire pressure warning antenna and receiver
.
|
|
11. |
CONFIRM TIRE INFLATION PRESSURE (DATA LIST) |
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON and turn the Techstream on.
(d) Enter the following menus: Chassis / Tire Pressure Monitor / Data List.
(e) Check the values by referring to the table below.
Tire Pressure Monitor
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
ID1 Tire Inflation Pressure |
ID1 tire inflation pressure / min.: Absolute pressure / 100 kPa (1 kgf/cm2, 14 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 449.35 kPa (4.6 kgf/cm2, 65 psi), Relative pressure / 349.35 kPa (3.6 kgf/cm2, 51 psi) |
Actual tire inflation pressure |
If 100 kPa (1 kgf/cm2, 14 psi) is displayed for absolute pressure or 0 kPa (0 kgf/cm2, 0 psi) is displayed for relative pressure, data has not been received*. |
|
ID2 Tire Inflation Pressure |
ID2 tire inflation pressure / min.: Absolute pressure / 100 kPa (1 kgf/cm2, 14 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 449.35 kPa (4.6 kgf/cm2, 65 psi), Relative pressure / 349.35 kPa (3.6 kgf/cm2, 51 psi) |
Actual tire inflation pressure |
If 100 kPa (1 kgf/cm2, 14 psi) is displayed for absolute pressure or 0 kPa (0 kgf/cm2, 0 psi) is displayed for relative pressure, data has not been received*. |
|
ID3 Tire Inflation Pressure |
ID3 tire inflation pressure / min.: Absolute pressure / 100 kPa (1 kgf/cm2, 14 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 449.35 kPa (4.6 kgf/cm2, 65 psi), Relative pressure / 349.35 kPa (3.6 kgf/cm2, 51 psi) |
Actual tire inflation pressure |
If 100 kPa (1 kgf/cm2, 14 psi) is displayed for absolute pressure or 0 kPa (0 kgf/cm2, 0 psi) is displayed for relative pressure, data has not been received*. |
|
ID4 Tire Inflation Pressure |
ID4 tire inflation pressure / min.: Absolute pressure / 100 kPa (1 kgf/cm2, 14 psi), Relative pressure / 0 kPa (0 kgf/cm2, 0 psi) max.: Absolute pressure / 449.35 kPa (4.6 kgf/cm2, 65 psi), Relative pressure / 349.35 kPa (3.6 kgf/cm2, 51 psi) |
Actual tire inflation pressure |
If 100 kPa (1 kgf/cm2, 14 psi) is displayed for absolute pressure or 0 kPa (0 kgf/cm2, 0 psi) is displayed for relative pressure, data has not been received*. |
HINT:
- *: It may take about 5 to 6 minutes until the values are displayed.
- When no "ID Tire Inflation Pressure" has changed, rotate the tire 90 to 270°. Then recheck it.
Result
|
Result |
Proceed to |
|---|---|
|
All tire pressure readings are equal to specified values. |
A |
|
Tire pressure values are not displayed. |
B |
|
|
|