DESCRIPTION
Each tire pressure warning valve and transmitter measures the tire internal temperature as well as tire pressure, and transmits the information to the tire pressure warning ECU along with the transmitter ID. If the measured temperature is out of the specified range, the tire pressure warning ECU recognizes it as a malfunction, outputs a DTC, and the tire pressure warning light blinks for 1 minute and remains on.
DTC No. 
DTC Detection Condition 
Trouble Area 

C2165/65 C2166/66 C2167/67 C2168/68 
Temperature inside the tire exceeds 119°C (246°F) more than the specified times. 

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. 
CHECK TIRES 
(a) Check that the tires are not flat, and there is no indication of reduced air pressure.
OK:
Tires are normal.
HINT:
If a tire is damaged, the tire pressure warning valve and transmitter may also have been damaged at the same time.
NG 
REPLACE TIRE AND TIRE PRESSURE WARNING VALVE AND TRANSMITTER 

2. 
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.
(i) Check the Data List.
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:
*: 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 ).
Result 
Detection Condition 

One of "ID Tire Inflation Pressure" data (ID1 to ID4) changed. 
Normal 
No "ID Tire Inflation Pressure" data changed. 
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 based on the recorded ID numbers and output DTC.

3. 
REPLACE TIRE PRESSURE WARNING VALVE AND TRANSMITTER 
(a) Replace the identified tire pressure warning valve and transmitter with a new one (See page ).
HINT:

4. 
CHECK REGISTRATION OF TRANSMITTER ID 
(a) Register the transmitter IDs for 4 tires (See page ).

5. 
READ VALUE USING TECHSTREAM (DATA LIST) 
(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
1. PRECAUTION FOR DISCONNECTING THE BATTERY CABLE
NOTICE:
When disconnecting the cable from the negative () battery terminal, initialize
the following systems after the terminal is reconnected.
System Name
See Procedure
...
Disassembly
DISASSEMBLY
PROCEDURE
1. REMOVE PROPELLER SHAFT
(a) Place matchmarks on both flanges.
Text in Illustration
*1
Matchmark
(b) Remove the 4 nuts, ...
Relay
Onvehicle Inspection
ONVEHICLE INSPECTION
PROCEDURE
1. INSPECT DOME CUT RELAY
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
...