C2145

TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: C2141/41-C2145/45: Transmitter ID1 Error
C2145/45 - Transmitter ID5 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 comes on.

When the internal circuit of any 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 that is malfunctioning because it cannot be identified by the output DTC.

INSPECTION PROCEDURE

NOTICE:
It is necessary to register the transmitter IDs after replacing the tire pressure warning valve and transmitter and/or the tire pressure warning ECU Programming and Relearning.

PROCEDURE

1. IDENTIFY TRANSMITTER CORRESPONDING TO DTC

(a) Set the tire pressure of all the wheels to the specified value Service Precautions.

(b) Turn the ignition switch off.

(c) Connect the Techstream to the DLC3.

(d) Turn the ignition switch ON.

(e) Turn the Techstream on.

(f) Rapidly reduce the tire pressure for each wheel at least 40 kPa (0.4 kg/cm2, 5.8 psi) within 30 seconds. If "ID Inflation Pressure" 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
*1: 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.

(g) Check the Data List.

Result:





NOTICE:
* If "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 forcibly transmit the transmitter ID and recheck it.
* Record the transmitter ID and position of transmitters that are normal.

(h) 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.

(i) When all of the "ID Tire Inflation Pressure" data (ID1 to ID5) have changed, identify the malfunctioning tire pressure warning valve and transmitter using recorded ID numbers and output DTC.

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 transmitter not to be replaced should be checked using the Techstream and recorded.

NEXT -- Continue to next step.

3. REGISTRATION OF TRANSMITTER ID

(a) Register the transmitter ID for all the wheels Programming and Relearning.

NEXT -- Continue to next step.

4. READ VALUE USING TECHSTREAM (TIRE INFLATION PRESSURE)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch ON.

(d) Turn the Techstream on.

(e) Check the values by referring to the table below. Enter the following menus: Chassis / Tire Pressure Monitor / Data List.

Tire Pressure Monitor:





HINT
* *1: 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 valve and rotate the tire 90 to 270 degrees. Then rapidly release the tire pressure and recheck it.

Result:





B -- REPLACE TIRE PRESSURE WARNING ECU Removal

A -- END