C2144

TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: C2141/41: Transmitter ID1 Error

DTC C2141/41 - Transmitter ID1 Error

DTC C2142/42 - Transmitter ID2 Error

DTC C2143/43 - Transmitter ID3 Error

DTC C2144/44 - Transmitter ID4 Error

DTC C2145/45 - Transmitter ID5 Error

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.
When the internal circuit of a tire pressure warning valve and transmitter is malfunctioning, one of these DTCs is output.





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.

INSPECTION PROCEDURE
NOTICE:
- When replacing the tire pressure warning ECU, read the IDs stored in the old ECU using a Techstream and write them down before removal.
- It is necessary to perform registration Programming and Relearning of the transmitter IDs into the tire pressure warning ECU after the ECU and/or valve and transmitter has been replaced.

PROCEDURE

1. IDENTIFY TRANSMITTER CORRESPONDING TO DTC
(a) Set the tire pressure to the specified value Component Tests and General Diagnostics.
(b) Turn the ignition switch off.
(c) Connect a Techstream to the DLC3.
(d) Turn the ignition switch to ON and turn the tester on.
(e) Enter the following menus: Chassis / Tire Pressure Monitor / Data List
(f) Display the "ID Tire Inflation Pressure" data for each wheel using the tester.
(g) Rapidly reduce the tire pressure for each wheel at least 40 kPa (0.4 kgf/cm2, 5.8 psi) within 30 seconds. If "ID Tire Inflation Pressure" data displayed on the tester (ID1 to ID5) does not change, the tire pressure warning valve and transmitter corresponding to the unchanged "ID Tire Inflation Pressure" data was the cause of the output DTC.
HINT:
- Identify the malfunctioning tire pressure warning valve and transmitter by repeatedly decreasing the tire pressure for each tire.
- Record which "ID Tire Inflation Pressure" data (ID1 to ID5) corresponds to which tire.

Tire Pressure Monitor





HINT: *: It may take about 2 or 3 minutes until the values are displayed. If the values are not displayed after a few minutes, perform troubleshooting according to the inspection procedure for DTCs C2121/21 to C2125/25 C2121.
(h) Check the Data List.

Result





NOTICE:
- When "ID Tire Inflation Pressure" data has not changed, reset the tire pressure to the appropriate specified value and rotate the tire 90 to 270°. Then forcibly transmit the transmitter ID and recheck.
- Record the transmitter ID and position of transmitters that are normal.
(i) When the "ID Tire Inflation Pressure" data (ID1 to ID5) has changed, repeat this procedure to identify the tire pressure warning valve and transmitter that corresponds to the DTC.
(j) When all of the "ID Tire Inflation Pressure" data (ID1 to ID5) has changed, identify the malfunctioning tire pressure warning valve and transmitter using recorded ID numbers and output DTC.
(k) Set the tire pressures to the appropriate specified values Component Tests and General Diagnostics.
NEXT -- Continue to next step.
2. REPLACE TIRE PRESSURE WARNING VALVE AND TRANSMITTER
(a) Replace the identified tire pressure warning valve and transmitter with a new one Removal.
HINT:
- Before installing a new tire pressure warning valve and transmitter, read and write down its transmitter ID.
- The IDs for the tire pressure warning valves and transmitters that are not replaced should be checked using the tester and recorded.

NEXT -- Continue to next step.
3. REGISTRATION OF TRANSMITTER ID
(a) Register the transmitter ID for all wheels Programming and Relearning.
NEXT -- Continue to next step.
4. CONFIRM TIRE INFLATION PRESSURE (DATA LIST)
(a) Turn the ignition switch off.
(b) Connect a Techstream to the DLC3.
(c) Turn the ignition switch to ON and turn the tester 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 2 or 3 minutes until the values are displayed.
- 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.

Result





B -- END
A -- REPLACE TIRE PRESSURE WARNING ECU