DTC 82

TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: C2121/21-C2124/24,C2181/81-C2184/84: No Signal from Transmitter ID1
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 tire 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 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 turns on.

The tire pressure warning valve 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 tester 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.





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 Initialization after registration 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 the Techstream on.

(d) Enter the following menus: Chassis / Tire Pressure Monitor / Trouble Codes.

(e) Read DTCs.

Result





NOTICE:
When DTC C2174/74 is output, troubleshoot that DTC first. Then troubleshoot DTCs C2121/21 to C2124/24.

B -- GO TO DTC C2174/74 C2174
A -- Continue to next step.

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 the surroundings, or devices installed by the user.

NG -- CHECK IF ANY DEVICE IS INSTALLED BY USER
OK -- Continue to next step.

3. IDENTIFY TRANSMITTER CORRESPONDING TO DTC

(a) Set the tire pressures to the appropriate specified value(s) Service Precautions.

(b) Turn the ignition switch off.

(c) Connect the Techstream to the DLC3.

(d) Turn the ignition switch to ON and 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





HINT
*: It may take about 5 to 6 minutes until the values are displayed.

(g) Rapidly reduce the tire pressure for each tire 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





C -- END

B -- CHECK TRANSMITTER ID
A -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (ECU - RECEIVER)

(a) Disconnect the J31 ECU connector.

(b) Disconnect the P17 receiver connector.

(c) Measure the resistance according to the value(s) in the table below.





Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

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 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





(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





B -- REGISTRATION OF TRANSMITTER ID
A -- Continue to next step.

6. REPLACE TIRE PRESSURE WARNING VALVE AND TRANSMITTER

(a) Replace the tire pressure warning valve and transmitter Removal.

NEXT -- Continue to next step.

7. REGISTRATION OF TRANSMITTER ID

(a) Perform registration Registration.

NEXT -- Continue to next step.

8. PERFORM INITIALIZATION

(a) Perform initialization Initialization.

NEXT -- Continue to next step.

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 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





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 rapidly release the tire pressure and recheck it.

Result





B -- END
A -- Continue to next step.

10. REPLACE TIRE PRESSURE WARNING ANTENNA AND RECEIVER

(a) Replace the tire pressure warning antenna and receiver Removal.

NEXT -- Continue to next step.

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 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





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 rapidly release the tire pressure and recheck it.

Result





B -- END

A -- REPLACE TIRE PRESSURE WARNING ECU Removal