C2145

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 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 the tire pressure warning valve and transmitter is malfunctioning, this DTC 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 ECU using the intelligent tester 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 or valve and transmitter has been replaced.

PROCEDURE

1. IDENTIFY TRANSMITTER CORRESPONDING TO DTC
(a) Set the tire pressure to the specified value.
Cold tire inflation pressure:





*1: For driving under 100 mph (160 km/h)
*2: For driving at 100 mph (160 km/h) or more
(b) Display the "Tire Inflation Pressure" data for each wheel using the intelligent tester.
(c) Rapidly reduce the tire pressure for each wheel by approximately 40 kPa (at least 40 kPa, 0.41 kgf/cm2, 5.8 psi within 30 seconds). If "Tire Inflation Pressure" displayed on the tester (ID1 to ID5) does not change, the tire pressure warning valve and transmitter corresponds to the DTC that was detected.
HINT:
- Identify the malfunctioning tire pressure warning valve and transmitter by repeatedly decreasing the tire pressure for each tire.
- Record which "TIREPRESS" data (ID1 to ID5) corresponds to each tire.





(d) Check the DATA LIST.
Result:





NOTICE:
- When "TIREPRESS" 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.
- Record the transmitter ID and position of transmitters that are normal.
(e) When the "TIREPRESS" data (ID1 to ID5) has changed, repeat this procedure to identify the tire pressure warning valve and transmitter that corresponds to a DTC.
(f) When all of the "TIREPRESS" data (ID1 to ID5) has changed, identify the malfunctioning tire pressure warning valve and transmitter using recorded ID numbers and output DTC.
(g) Set the tire pressures to the appropriate specified values.
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.
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 that have not been replaced should be checked using the tester and recorded.

NEXT -- Continue to next step.
3. PERFORM REGISTRATION (TRANSMITTER ID)
(a) Register the transmitter ID for all 5 wheels .
(b) Set the tire pressure of the 5 wheels to the specified value (For the specified value, see step 1).
NEXT -- Continue to next step.
4. PERFORM INITIALIZATION
(a) Perform initialization .
NEXT -- Continue to next step.
5. CHECK DTC
(a) Check for a DTC .
Result:






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