C2144
TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: C2141/41-C2144/44: Transmitter ID1 Error
C2144/44 - Transmitter ID4 Error
DESCRIPTION
The tire pressure warning valve 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 illuminates.
When the internal circuit of a tire pressure warning valve and transmitter is malfunctioning, one of these DTCs is stored.
HINT
It is necessary to perform the procedure to identify the tire pressure warning valve and transmitter because it cannot be identified by the output DTCs.
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 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 Programming and Relearning.
PROCEDURE
1. IDENTIFY TRANSMITTER CORRESPONDING TO DTC
(a) Set the tire pressure of all tires to the specified value Component Tests and General Diagnostics.
(b) Turn the ignition switch off.
(c) Connect the Techstream to the DLC3.
(d) Turn the ignition switch to ON.
(e) Turn the Techstream on.
(f) Enter the following menus: Chassis / Tire Pressure Monitor / Data List.
(g) Check the "ID Tire Inflation Pressure" data for each wheel using the Techstream.
(h) Rapidly reduce the tire pressure of each tire by at least 40 kPa (0.4 kgf/cm2, 5.8 psi) within 30 seconds. If "ID Tire Inflation Pressure" data displayed on the Techstream (ID1 to ID4) does not change, the tire pressure warning valve and transmitter corresponding to the unchanged "ID Tire Inflation Pressure" data is 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 ID4) corresponds to which tire.
Tire Pressure Monitor
HINT
*: It may take approximately 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 C2124/24 C2121.
(i) 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.
(j) When an "ID Inflation Pressure" data value (one of ID1 to ID4) has changed, repeat this procedure for each tire.
(k) When all of the "ID Tire Inflation Pressure" data (ID1 to ID4) has changed, identify the malfunctioning tire pressure warning valve and transmitter using the recorded ID numbers and output DTC.
(l) Set the tire pressures of all tires to the 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 valve and transmitters that are not replaced should be checked using the Techstream and recorded.
NEXT -- Continue to next step.
3. PERFORM REGISTRATION OF TRANSMITTER ID
(a) Register the transmitter IDs for all wheels Programming and Relearning.
NEXT -- Continue to next step.
4. CONFIRM TIRE INFLATION PRESSURE (DATA LIST) C2121
B -- REPLACE TIRE PRESSURE WARNING ECU Removal
A -- END