Toyota CH-R Service Manual: No Signal from Transmitter ID1 (C2121/21-C2125/25,C2181/81-C2185/85)

Toyota CH-R Service Manual / Tire Pressure Monitoring / Tire Pressure Warning System / No Signal from Transmitter ID1 (C2121/21-C2125/25,C2181/81-C2185/85)

DESCRIPTION

The tire pressure warning valve and transmitters that are installed in the tire and wheel assemblies measure the tire pressures. The measured values are transmitted to the tire pressure warning ECU and receiver in the vehicle as radio waves. The ECU compares the measured tire pressure values with the tire pressure threshold. When the measured tire pressure value is less than this threshold, the warning light in the combination meter assembly illuminates.

The tire pressure warning valve and transmitters constantly send radio waves to the tire pressure warning ECU and receiver.

Under the conditions below, the tire pressure warning ECU and receiver is unable to receive the signals from the tire pressure warning valve and transmitters, and a DTC is stored.

  • Facilities or devices that use similar radio frequencies are located in the vicinity of the vehicle.
  • Devices using similar radio frequencies are used in the vehicle.
  • The ID of a tire pressure warning valve and transmitter is mistyped during registration.
  • A tire, wheel and/or transmitter from a different vehicle is installed.

HINT:

When no transmitter ID is received from a tire pressure warning valve and transmitter for 20 minutes or more while the vehicle speed is more than 40 km/h (25 mph), or no transmitter ID is received from any of the tire pressure warning valve and transmitters for 20 minutes or more, DTCs from C2121/21 to C2124/24 (C2125/25: w/ Full Size Spare Tire) are stored.

DTCs C2121/21 to C2124/24 (C2125/25: w/ Full Size Spare Tire) can only be cleared by using the Techstream. DTCs C2181/81 to C2184/84 (C2185/85: w/ Full Size Spare Tire) can be cleared when the tire pressure warning valve and transmitter sends a forced transmission signal or test mode ends. DTCs C2181/81 to C2184/84 (C2185/85: w/ Full Size Spare Tire) are output only in test mode.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Note

C2121/21

No Signal from Transmitter ID1

Either of the following conditions (a) or (b) is met:

(a) When all conditions below are met:

  • Tire pressure warning valve and transmitter is not in stop mode.
  • Any transmitter ID is not received from tire pressure warning valve and transmitters.
  • Vehicle speed is more than 40 km/h (25 mph) or no vehicle speed signal is received for 20 minutes or more.

(b) When both conditions below are met:

  • Tire pressure warning valve and transmitter is not in stop mode.
  • No transmitter ID is received from tire pressure warning valve and transmitters for 20 minutes or more.
  • Tire pressure warning valve and transmitter
  • Tire pressure warning ECU and receiver

-

C2122/22

No Signal from Transmitter ID2

Either of the following conditions (a) or (b) is met:

(a) When all conditions below are met:

  • Tire pressure warning valve and transmitter is not in stop mode.
  • Any transmitter ID is not received from tire pressure warning valve and transmitters.
  • Vehicle speed is more than 40 km/h (25 mph) or no vehicle speed signal is received for 20 minutes or more.

(b) When both conditions below are met:

  • Tire pressure warning valve and transmitter is not in stop mode.
  • No transmitter ID is received from tire pressure warning valve and transmitters for 20 minutes or more.
  • Tire pressure warning valve and transmitter
  • Tire pressure warning ECU and receiver

-

C2123/23

No Signal from Transmitter ID3

Either of the following conditions (a) or (b) is met:

(a) When all conditions below are met:

  • Tire pressure warning valve and transmitter is not in stop mode.
  • Any transmitter ID is not received from tire pressure warning valve and transmitters.
  • Vehicle speed is more than 40 km/h (25 mph) or no vehicle speed signal is received for 20 minutes or more.

(b) When both conditions below are met:

  • Tire pressure warning valve and transmitter is not in stop mode.
  • No transmitter ID is received from tire pressure warning valve and transmitters for 20 minutes or more.
  • Tire pressure warning valve and transmitter
  • Tire pressure warning ECU and receiver

-

C2124/24

No Signal from Transmitter ID4

Either of the following conditions (a) or (b) is met:

(a) When all conditions below are met:

  • Tire pressure warning valve and transmitter is not in stop mode.
  • Any transmitter ID is not received from tire pressure warning valve and transmitters.
  • Vehicle speed is more than 40 km/h (25 mph) or no vehicle speed signal is received for 20 minutes or more.

(b) When both conditions below are met:

  • Tire pressure warning valve and transmitter is not in stop mode.
  • No transmitter ID is received from tire pressure warning valve and transmitters for 20 minutes or more.
  • Tire pressure warning valve and transmitter
  • Tire pressure warning ECU and receiver

-

C2125/25

No Signal from Transmitter ID5

Either of the following conditions (a) or (b) is met:

(a) When all conditions below are met:

  • Tire pressure warning valve and transmitter is not in stop mode.
  • Any transmitter ID is not received from tire pressure warning valve and transmitters.
  • Vehicle speed is more than 40 km/h (25 mph) or no vehicle speed signal is received for 20 minutes or more.

(b) When both conditions below are met:

  • Tire pressure warning valve and transmitter is not in stop mode.
  • No transmitter ID is received from tire pressure warning valve and transmitters for 20 minutes or more.
  • Tire pressure warning valve and transmitter
  • Tire pressure warning ECU and receiver

w/ Full Size Spare Tire

C2181/81

Transmitter ID1 not Received (Test Mode DTC)

Test mode procedure is performed.
  • Tire pressure warning valve and transmitter
  • Tire pressure warning ECU and receiver

-

C2182/82

Transmitter ID2 not Received (Test Mode DTC)

Test mode procedure is performed.
  • Tire pressure warning valve and transmitter
  • Tire pressure warning ECU and receiver

-

C2183/83

Transmitter ID3 not Received (Test Mode DTC)

Test mode procedure is performed.
  • Tire pressure warning valve and transmitter
  • Tire pressure warning ECU and receiver

-

C2184/84

Transmitter ID4 not Received (Test Mode DTC)

Test mode procedure is performed.
  • Tire pressure warning valve and transmitter
  • Tire pressure warning ECU and receiver

-

C2185/85

Transmitter ID5 not Received (Test Mode DTC)

Test mode procedure is performed.
  • Tire pressure warning valve and transmitter
  • Tire pressure warning ECU and receiver

w/ Full Size Spare Tire

NOTICE:

When DTCs C2121/21 to C2124/24 (C2125/25: w/ Full Size Spare Tire) are stored, DTC C2179/79 may be stored simultaneously. In such cases, troubleshoot DTCs C2121/21 to C2124/24 (C2125/25: w/ Full Size Spare Tire) first, then troubleshoot DTC C2179/79.

HINT:

It is necessary to perform the following procedure to identify the tire pressure warning valve and transmitter that is malfunctioning because it cannot be identified by the output DTC.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the tire pressure warning ECU and receiver, read the transmitter IDs stored in the old ECU using the Techstream and write them down before removal.

    Click here

  • It is necessary to perform initialization after registration of the transmitter IDs into the tire pressure warning ECU and receiver if the ECU and/or one of the valve and transmitters has been replaced.

PROCEDURE

1.

CHECK FREQUENCY RECEIVING CONDITION

(a) Check that the following conditions are not met:

(1) Facilities or devices that use similar radio frequencies are located in the vicinity of the vehicle.

HINT:

If the vehicle is located in an area such as the one described above, the tire pressure warning light may come on only in a particular area.

(2) Devices using similar radio frequencies are used in the vehicle.

OK:

Facilities or devices that use similar radio frequencies are not located in the vicinity of the vehicle.

HINT:

Radio transmissions may be interrupted due to the surroundings or devices installed by the user.

NG

CHECK IF ANY DEVICE IS INSTALLED BY USER
OK

2.

IDENTIFY TRANSMITTER CORRESPONDING TO DTC

(a) Set the tire pressure to the specified value.

Click here

(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" value for each wheel using the Techstream.

(h) Rapidly reduce the tire pressure for each wheel at least 40 kPa (0.4 kgf/cm2, 5.8 psi) within 30 seconds. If the "ID Tire Inflation Pressure" value displayed on the Techstream does not change, the tire pressure warning valve and transmitter corresponding to the unchanged "ID Tire Inflation Pressure" value 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" value corresponds to each tire.
Chassis > Tire Pressure Monitor > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

ID 1 Tire Inflation Pressure

ID1 tire inflation pressure

min.: Absolute pressure (abs) / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure (Gauge) / 0 kPa (0 kgf/cm2, 0 psi)

max.: Absolute pressure (abs) / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure (Gauge) / 380 kPa (3.9 kgf/cm2, 55 psi)

Actual tire inflation pressure

If N/A is displayed, data has not been received.*1

ID 2 Tire Inflation Pressure

ID2 tire inflation pressure

min.: Absolute pressure (abs) / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure (Gauge) / 0 kPa (0 kgf/cm2, 0 psi)

max.: Absolute pressure (abs) / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure (Gauge) / 380 kPa (3.9 kgf/cm2, 55 psi)

Actual tire inflation pressure

If N/A is displayed, data has not been received.*1

ID 3 Tire Inflation Pressure

ID3 tire inflation pressure

min.: Absolute pressure (abs) / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure (Gauge)/ 0 kPa (0 kgf/cm2, 0 psi)

max.: Absolute pressure (abs) / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure (Gauge) / 380 kPa (3.9 kgf/cm2, 55 psi)

Actual tire inflation pressure

If N/A is displayed, data has not been received.*1

ID 4 Tire Inflation Pressure

ID4 tire inflation pressure

min.: Absolute pressure (abs) / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure (Gauge) / 0 kPa (0 kgf/cm2, 0 psi)

max.: Absolute pressure (abs) / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure (Gauge) / 380 kPa (3.9 kgf/cm2, 55 psi)

Actual tire inflation pressure

If N/A is displayed, data has not been received.*1

ID 5 Tire Inflation Pressure

ID5 tire inflation pressure

min.: Absolute pressure (abs) / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure (Gauge) / 0 kPa (0 kgf/cm2, 0 psi)

max.: Absolute pressure (abs) / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure (Gauge) / 380 kPa (3.9 kgf/cm2, 55 psi)

Actual tire inflation pressure
  • If N/A is displayed, data has not been received.*1
  • *2

HINT:

  • *1: It may take a few minutes until the values are displayed.
  • *2: w/ Full Size Spare Tire
Chassis > Tire Pressure Monitor > Data List

Tester Display

ID 1 Tire Inflation Pressure

ID 2 Tire Inflation Pressure

ID 3 Tire Inflation Pressure

ID 4 Tire Inflation Pressure

ID 5 Tire Inflation Pressure

(i) Check the Data List.

NOTICE:

  • It may take a few minutes to display the updated tire pressure data.
  • When an "ID Tire Inflation Pressure" value has not changed, reset the tire pressure to the appropriate specified value and rotate the tire 90 to 270 degrees. Then rapidly release the tire pressure and recheck the value.
  • Record the transmitter ID of which "ID Tire Inflation Pressure" values corresponds to each tire.

(j) After confirming that the "ID Tire Inflation Pressure" value for one tire has changed, repeat this procedure for each tire. Identify the transmitter that corresponds to the DTC.

Result

Proceed to

One or more transmitter is abnormal

A

All transmitters are normal

B
B

END
A

3.

CHECK TRANSMITTER ID

(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.

Chassis > Tire Pressure Monitor > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Registered ID 1 Code

Registered ID1 code

min.: 0

max.: FFFFFFF*1

ID No. registered for transmitter ID1 displayed

-

Registered ID 2 Code

Registered ID2 code

min.: 0

max.: FFFFFFF*1

ID No. registered for transmitter ID2 displayed

-

Registered ID 3 Code

Registered ID3 code

min.: 0

max.: FFFFFFF*1

ID No. registered for transmitter ID3 displayed

-

Registered ID 4 Code

Registered ID4 code

min.: 0

max.: FFFFFFF*1

ID No. registered for transmitter ID4 displayed

-

Registered ID 5 Code

Registered ID5 code

min.: 0

max.: FFFFFFF*1

ID No. registered for transmitter ID5 displayed

*2

HINT:

  • *1: Displayed only when the ID No. is not registered.
  • *2: w/ Full Size Spare Tire
  • The wheel position cannot be determined from ID1 through ID4 (ID5: w/ Full Size Spare Tire) on the Data List.
Chassis > Tire Pressure Monitor > Data List

Tester Display

Registered ID 1 Code

Registered ID 2 Code

Registered ID 3 Code

Registered ID 4 Code

Registered ID 5 Code

(g) Check the ID number on the identified transmitter by removing it from the tire and wheel.

*1

Tire Pressure Warning Valve and Transmitter

-

-

*a

Transmitter ID (7-digit Number)

-

-

(h) Confirm that the ID number on the transmitter and recorded transmitter ID match.

Result

Proceed to

Match

A

Do not match

B
B

GO TO STEP 5

A

4.

REPLACE TIRE PRESSURE WARNING VALVE AND TRANSMITTER

(a) Replace the tire pressure warning valve and transmitter.

Click here

NEXT

5.

REGISTRATION OF TRANSMITTER ID

(a) Perform registration.

Click here

NEXT

6.

PERFORM INITIALIZATION

(a) Set the tire pressure to the specified value.

Click here

(b) Perform initialization.

Click here

NEXT

7.

CONFIRM TIRE INFLATION PRESSURE (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.

Chassis > Tire Pressure Monitor > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

ID 1 Tire Inflation Pressure

ID1 tire inflation pressure

min.: Absolute pressure (abs) / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure (Gauge) / 0 kPa (0 kgf/cm2, 0 psi)

max.: Absolute pressure (abs) / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure (Gauge) / 380 kPa (3.9 kgf/cm2, 55 psi)

Actual tire inflation pressure

If N/A is displayed, data has not been received.*1

ID 2 Tire Inflation Pressure

ID2 tire inflation pressure

min.: Absolute pressure (abs) / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure (Gauge) / 0 kPa (0 kgf/cm2, 0 psi)

max.: Absolute pressure (abs) / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure (Gauge) / 380 kPa (3.9 kgf/cm2, 55 psi)

Actual tire inflation pressure

If N/A is displayed, data has not been received.*1

ID 3 Tire Inflation Pressure

ID3 tire inflation pressure

min.: Absolute pressure (abs) / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure (Gauge) / 0 kPa (0 kgf/cm2, 0 psi)

max.: Absolute pressure (abs) / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure (Gauge) / 380 kPa (3.9 kgf/cm2, 55 psi)

Actual tire inflation pressure

If N/A is displayed, data has not been received.*1

ID 4 Tire Inflation Pressure

ID4 tire inflation pressure

min.: Absolute pressure (abs) / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure (Gauge) / 0 kPa (0 kgf/cm2, 0 psi)

max.: Absolute pressure (abs) / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure (Gauge) / 380 kPa (3.9 kgf/cm2, 55 psi)

Actual tire inflation pressure

If N/A is displayed, data has not been received.*1

ID 5 Tire Inflation Pressure

ID5 tire inflation pressure

min.: Absolute pressure (abs) / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure (Gauge) / 0 kPa (0 kgf/cm2, 0 psi)

max.: Absolute pressure (abs) / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure (Gauge) / 380 kPa (3.9 kgf/cm2, 55 psi)

Actual tire inflation pressure
  • If N/A is displayed, data has not been received.*1
  • *2

HINT:

  • *1: It may take a few minutes until the values are displayed.
  • The wheel position cannot be determined from ID1 through ID4 (ID5: w/ Full Size Spare Tire) on the Data List.
  • When an "ID Tire Inflation Pressure" value has not changed, reset the tire pressure to the appropriate specified value and rotate the tire 90 to 270 degrees. Then rapidly release the tire pressure and recheck the value.
  • *2: w/ Full Size Spare Tire
Chassis > Tire Pressure Monitor > Data List

Tester Display

ID 1 Tire Inflation Pressure

ID 2 Tire Inflation Pressure

ID 3 Tire Inflation Pressure

ID 4 Tire Inflation Pressure

ID 5 Tire Inflation Pressure

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 AND RECEIVER

B

END
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