DESCRIPTION
The tire pressure warning valve and transmitter installed in each tire and wheel assembly measures the tire pressures. The measured values are transmitted as radio waves to the tire pressure warning antenna and receiver on the body 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 accessory meter comes on.
When the internal circuit of the tire pressure warning valve and transmitter is malfunctioning, one of these DTCs is output.
DTC No. 
DTC Detection Condition 
Trouble Area 

C2141/41 C2142/42 C2143/43 C2144/44 
If an "ERROR" signal is received 3 times consecutively, the tire pressure warning valve and transmitter will be judged as defective and a DTC will be output. This will happen in situations where the inflation pressure is outside the range 100 to 537.5 kPa (1.0 to 5.4 kgf/cm2, 14 to 78 psi), the temperature inside the tire is outside the specified range 40 to 120°C (40 to 248°F), or an error occurs in the tire pressure warning valve and transmitter or the surrounding area. 

HINT:
It is necessary to perform this procedure to identify the malfunctioning tire pressure warning valve and transmitter as it cannot be identified only by the output DTC.
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. 
IDENTIFY TRANSMITTER CORRESPONDING TO DTC 
(a) Set all tire pressures to the specified value(s) (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) Display the "ID Tire Inflation Pressure" data for each wheel using the Techstream.
(h) Rapidly reduce the tire pressure for each wheel at least 40 kPa (0.4 kg/cm2, 5.8 psi) within 30 seconds. If "ID Tire Inflation Pressure" 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 was 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 kPa (0 kgf/cm2, 0 psi), Relative pressure/ 100 kPa (1.0 kgf/cm2, 14 psi) max.: Absolute pressure/ 638 kPa (6.4 kgf/cm2, 93 psi), Relative pressure/ 538 kPa (5.4 kgf/cm2, 78 psi) 
Actual tire inflation pressure 
If 0 kPa (0 kgf/cm2, 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*. 
ID2 Tire Inflation Pressure 
ID2 tire inflation pressure/ min.: Absolute pressure/ 0 kPa (0 kgf/cm2, 0 psi), Relative pressure/ 100 kPa (1.0 kgf/cm2, 14 psi) max.: Absolute pressure/ 638 kPa (6.4 kgf/cm2, 93 psi), Relative pressure/ 538 kPa (5.4 kgf/cm2, 78 psi) 
Actual tire inflation pressure 
If 0 kPa (0 kgf/cm2, 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*. 
ID3 Tire Inflation Pressure 
ID3 tire inflation pressure/ min.: Absolute pressure/ 0 kPa (0 kgf/cm2, 0 psi), Relative pressure/ 100 kPa (1.0 kgf/cm2, 14 psi) max.: Absolute pressure/ 638 kPa (6.4 kgf/cm2, 93 psi), Relative pressure/ 538 kPa (5.4 kgf/cm2, 78 psi) 
Actual tire inflation pressure 
If 0 kPa (0 kgf/cm2, 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*. 
ID4 Tire Inflation Pressure 
ID4 tire inflation pressure/ min.: Absolute pressure/ 0 kPa (0 kgf/cm2, 0 psi), Relative pressure/ 100 kPa (1.0 kgf/cm2, 14 psi) max.: Absolute pressure/ 638 kPa (6.4 kgf/cm2, 93 psi), Relative pressure/ 538 kPa (5.4 kgf/cm2, 78 psi) 
Actual tire inflation pressure 
If 0 kPa (0 kgf/cm2, 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*. 
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 C2124/24 (See page ).
(i) Check the Data List.
Result 
Detection Condition 

One of "ID Tire Inflation Pressure" data (ID1 to ID4) changed. 
Normal 
"ID Tire Inflation Pressure" data did not change. 
Transmitter corresponding to DTC 
NOTICE:
(j) When the "ID Tire inflation Pressure" data (ID1 to ID4) has changed, repeat this procedure to identify the tire pressure warning valve and transmitter that corresponds to the DTC.
(k) When all of the "ID Tire Inflation Pressure" data (ID1 to ID4) have changed, identify the malfunctioning tire pressure warning valve and transmitter using the recorded ID numbers and output DTCs.

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:
(b) Set the tire pressure to the specified value (See page ).

3. 
REGISTRATION OF TRANSMITTER ID 
(a) Register the transmitter ID for all wheels (See page ).

4. 
READ VALUE USING TECHSTREAM 
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Enter the following menus: Chassis / Tire Pressure Monitor / Data List.
(f) Check the values by referring to the table below.
Tire Pressure Monitor
Tester Display 
Measurement Item/Range 
Normal Condition 
Diagnostic Note 

ID1 Tire Inflation Pressure 
ID1 tire inflation pressure/ min.: Absolute pressure/ 0 kPa (0 kgf/cm2, 0 psi), Relative pressure/ 100 kPa (1.0 kgf/cm2, 14 psi) max.: Absolute pressure/ 638 kPa (6.4 kgf/cm2, 93 psi), Relative pressure/ 538 kPa (5.4 kgf/cm2, 78 psi) 
Actual tire inflation pressure 
If 0 kPa (0 kgf/cm2, 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*. 
ID2 Tire Inflation Pressure 
ID2 tire inflation pressure/ min.: Absolute pressure/ 0 kPa (0 kgf/cm2, 0 psi), Relative pressure/ 100 kPa (1.0 kgf/cm2, 14 psi) max.: Absolute pressure/ 638 kPa (6.4 kgf/cm2, 93 psi), Relative pressure/ 538 kPa (5.4 kgf/cm2, 78 psi) 
Actual tire inflation pressure 
If 0 kPa (0 kgf/cm2, 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*. 
ID3 Tire Inflation Pressure 
ID3 tire inflation pressure/ min.: Absolute pressure/ 0 kPa (0 kgf/cm2, 0 psi), Relative pressure/ 100 kPa (1.0 kgf/cm2, 14 psi) max.: Absolute pressure/ 638 kPa (6.4 kgf/cm2, 93 psi), Relative pressure/ 538 kPa (5.4 kgf/cm2, 78 psi) 
Actual tire inflation pressure 
If 0 kPa (0 kgf/cm2, 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*. 
ID4 Tire Inflation Pressure 
ID4 tire inflation pressure/ min.: Absolute pressure/ 0 kPa (0 kgf/cm2, 0 psi), Relative pressure/ 100 kPa (1.0 kgf/cm2, 14 psi) max.: Absolute pressure/ 638 kPa (6.4 kgf/cm2, 93 psi), Relative pressure/ 538 kPa (5.4 kgf/cm2, 78 psi) 
Actual tire inflation pressure 
If 0 kPa (0 kgf/cm2, 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*. 
HINT:
Result 
Proceed to 

Tire pressure values are not displayed. 
A 
All tire pressure readings are equal to specified values. 
B 
A 
REPLACE TIRE PRESSURE WARNING ECU 
B 
END 
Precaution
PRECAUTION
NOTICE:
When disconnecting the cable from the negative () battery terminal, initialize
the following systems after the cable is reconnected.
System Name
See Procedure
Back Door Closer System
...
Inspection
INSPECTION
PROCEDURE
1. INSPECT PAD LINING THICKNESS
(a) Using a ruler, measure the pad lining thickness.
Text in Illustration
*1
Ruler
Standard thickness of a new pad:
10.0 mm (0.394 ...
Combination Meter
Components
COMPONENTS
ILLUSTRATION
Disassembly
DISASSEMBLY
PROCEDURE
1. REMOVE COMBINATION METER GLASS
(a) Disengage the 9 claws to remove the combination meter glass.
Removal
REMOVAL
...