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.
DTC Code |
Detection Condition |
Trouble Area |
---|---|---|
C2141/41 C2142/42 C2143/43 C2144/44 C2145/45* |
If an "ERROR" signal is received 3 times consecutively, the tire pressure warning valve and transmitter is judged as defective and a DTC is stored. This happens in situations where the inflation pressure is outside the range of -100.0 to 537.5 kPa (-1.0 to 5.4 kgf/cm2, -14 psi to 78 psi), the temperature inside the tire is outside the specified range of -40 to 120°C (-40 to 253°F), or an error occurs in the tire pressure warning valve and transmitter or the surrounding area. |
|
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.
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
IDENTIFY TRANSMITTER CORRESPONDING TO DTC |
(a) Set the tire pressure of all tires to the specified value (See page ).
(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 or ID5*) 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:
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
ID1 Tire Inflation Pressure |
ID1 tire inflation pressure / min.: Absolute pressure 0.0 kPa (0.0 kgf/cm2, 0.0 psi), Relative pressure -100.0 kPa (-1.0 kgf/cm2, -14 psi) max.: Absolute pressure 637.5 kPa (6.5 kgf/cm2, 92 psi), Relative pressure 537.5 kPa (5.4 kgf/cm2, 78 psi) |
Actual tire inflation pressure |
If 0 kPa (0.0 kgf/cm2, 0.0 psi) is displayed for absolute pressure or -100 kPa (-1.0 kgf/cm2, -14 psi) is displayed for relative pressure, data has not been received.*1 |
ID2 Tire Inflation Pressure |
ID2 tire inflation pressure / min.: Absolute pressure 0.0 kPa (0.0 kgf/cm2, 0.0 psi), Relative pressure -100.0 kPa (-1.0 kgf/cm2, -14 psi) max.: Absolute pressure 637.5 kPa (6.5 kgf/cm2, 92 psi), Relative pressure 537.5 kPa (5.4 kgf/cm2, 78 psi) |
Actual tire inflation pressure |
If 0 kPa (0.0 kgf/cm2, 0.0 psi) is displayed for absolute pressure or -100 kPa (-1.0 kgf/cm2, -14 psi) is displayed for relative pressure, data has not been received.*1 |
ID3 Tire Inflation Pressure |
ID3 tire inflation pressure / min.: Absolute pressure 0.0 kPa (0.0 kgf/cm2, 0.0 psi), Relative pressure -100.0 kPa (-1.0 kgf/cm2, -14 psi) max.: Absolute pressure 637.5 kPa (6.5 kgf/cm2, 92 psi), Relative pressure 537.5 kPa (5.4 kgf/cm2, 78 psi) |
Actual tire inflation pressure |
If 0 kPa (0.0 kgf/cm2, 0.0 psi) is displayed for absolute pressure or -100 kPa (-1.0 kgf/cm2, -14 psi) is displayed for relative pressure, data has not been received.*1 |
ID4 Tire Inflation Pressure |
ID4 tire inflation pressure / min.: Absolute pressure 0.0 kPa (0.0 kgf/cm2, 0.0 psi), Relative pressure -100.0 kPa (-1.0 kgf/cm2, -14 psi) max.: Absolute pressure 637.5 kPa (6.5 kgf/cm2, 92 psi), Relative pressure 537.5 kPa (5.4 kgf/cm2, 78 psi) |
Actual tire inflation pressure |
If 0 kPa (0.0 kgf/cm2, 0.0 psi) is displayed for absolute pressure or -100 kPa (-1.0 kgf/cm2, -14 psi) is displayed for relative pressure, data has not been received.*1 |
ID5 Tire Inflation Pressure*2 |
ID5 tire inflation pressure/ min.: Absolute pressure 0.0 kPa (0.0 kgf/cm2, 0.0 psi), Relative pressure -100.0 kPa (-1.0 kgf/cm2, -14 psi) max.: Absolute pressure 637.5 kPa (6.5 kgf/cm2, 92 psi), Relative pressure 537.5 kPa (5.4 kgf/cm2, 78 psi) |
Actual tire inflation pressure |
If 0 kPa (0.0 kgf/cm2, 0.0 psi) is displayed for absolute pressure or -100 kPa (-1.0 kgf/cm2, -14 psi) is displayed for relative pressure, data has not been received.*1 |
HINT:
(i) Check the Data List.
Result
Result |
Detection Condition |
---|---|
"Tire Inflation Pressure" data (ID1 to ID4 or ID5*) changed |
Normal |
One of "Tire Inflation Pressure" data did not change |
Transmitter corresponding to DTC |
NOTICE:
(j) When an "ID Inflation Pressure" data value (one of ID1 to ID4 or ID5*) has changed, repeat this procedure for each tire.
(k) When all of the "ID Tire Inflation Pressure" data (ID1 to ID4 or ID5*) 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 (See page ).
|
2. |
REPLACE TIRE PRESSURE WARNING VALVE AND TRANSMITTER |
(a) Replace the identified tire pressure warning valve and transmitter with a
new one (See page
).
HINT:
|
3. |
PERFORM REGISTRATION OF TRANSMITTER ID |
(a) Register the transmitter IDs for all wheels (See page ).
|
4. |
CONFIRM TIRE INFLATION PRESSURE (DATA LIST) |
A |
END |
B |
REPLACE TIRE PRESSURE WARNING ECU |
Disassembly
DISASSEMBLY
CAUTION / NOTICE / HINT
HINT:
Use the same procedure for the RH and LH sides.
The procedure listed below is for the LH side.
PROCEDURE
1. REMOVE STEP PLATE COVER LH
(a) Remove the 2 screws and step plate cover LH. ...
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