Toyota Tundra Service Manual: Initialization not Completed (C2177/77)

DESCRIPTION

Initialization is necessary if one of the following occurs:

  • The tire pressure warning ECU and receiver is replaced.
  • A tire pressure warning valve and transmitter is replaced.
  • Tires with different standard tire pressures are installed.
  • A new vehicle is delivered.

Tire pressure initialization is started by pressing and holding the tire pressure warning reset switch with the ignition switch ON. The tire pressure warning ECU and receiver flashes the tire pressure warning light of the combination meter assembly 3 times and registers the tire pressure sent by the tire pressure warning valve and transmitter after receiving an initialization command signal.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Note

C2177/77

Initialization not Completed

All conditions below are met:

  • During initialization
  • Tire pressure warning valve and transmitter is not in stop mode
  • Signal is not received from tire pressure warning valve and transmitter for 20 minutes or more
  • Vehicle speed is more than 40 km/h (25 mph) for 20 minutes or more
  • Tire pressure warning valve and transmitter
  • Wire harness or connector
  • Tire pressure warning ECU and receiver

-

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.
  • 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.
  • Initialization will not complete and DTC C2177/77 may be stored in the tire pressure warning ECU and receiver if the Techstream is used to perform initialization with the ECU Data Item list displayed for 10 minutes or longer.

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 illuminate after blinking 1 minute due to interfering radio frequencies.

(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.

PERFORM INITIALIZATION

(a) Perform initialization.

Click here

NEXT

3.

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.*

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.*

ID 3 Tire Inflation Pressure

ID 3 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.*

ID 4 Tire Inflation Pressure

ID 4 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.*

HINT:

  • *: It may take a few minutes until the values are displayed.

    For this vehicle, data reception from the tire pressure warning valve and transmitter may worsen while displaying the Data List and it may takes longer than usual to receive data.

    If data reception worsens while displaying the Data List, rapidly decrease the tire pressure by 20 to 30 kPa (this increases the valve transmission frequency).

  • The wheel position cannot be determined from ID1 through ID4 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.

Result

Proceed to

All tire pressure readings are equal to specified values.

A

Tire pressure values are not displayed.

B

A

END

B

GO TO DTC (C2121/21 TO C2124/24)

    Receiver Error (C2176/76)

    Tire Pressure Monitor ECU Communication Stop (C2179/79)

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