Toyota Tundra Service Manual: Tire Position Not Identified

DESCRIPTION

The tire pressure warning ECU and receiver identifies the tire position for each tire pressure warning valve and transmitter according to the wheel speed signals from the skid control ECU and acceleration rate signal from each acceleration sensor built into each tire pressure warning valve and transmitter.

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 one of the valve and transmitters has been replaced.

PROCEDURE

1.

IDENTIFY TIRE POSITION FOR EACH TIRE PRESSURE WARNING VALVE AND TRANSMITTER

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

Click here

(b) Turn the ignition switch to ON and let the vehicle idle for 2 to 3 minutes.

HINT:

For this vehicle, it may take longer than usual to receive data from the tire pressure warning valve and transmitter while the Data List is displayed. Therefore, before displaying the Data List, wait 2 to 3 minutes to receive data from the tire pressure warning valve and transmitter.

(c) Turn the ignition switch off.

(d) Connect the Techstream to the DLC3.

(e) Turn the ignition switch to ON.

(f) Turn the Techstream on.

(g) Enter the following menus: Chassis / Tire Pressure Monitor / Data List.

(h) Display the "ID Tire Inflation Pressure" value for each wheel using the Techstream.

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

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.*

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.*

HINT:

  • *: It may take a few minutes until the values are displayed.
  • The wheel position cannot be determined from ID1 through ID4 on the Data List.

(i) Rapidly reduce the tire pressure for each wheel at least 40 kPa (0.4 kgf/cm2, 5.8 psi) within 30 seconds.

NOTICE:

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

(j) Read the "ID Tire Inflation Pressure" value and identify the tire with reduced pressure, and record the corresponding tire pressure warning valve and transmitter (ID1 to ID4).

(k) Repeat for each tire.

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

Click here

NEXT

2.

PERFORM INITIALIZATION

(a) Leave the vehicle with the ignition switch turned off for 15 minutes or more.

HINT:

After the vehicle has been stopped for 15 minutes or more, the tire pressure warning valve and transmitter will transmit radio wave signals more frequently for the first several minutes of driving (4 times more frequent than usual).

(b) Perform initialization to clear the existing tire position information.

Click here

NEXT

3.

IDENTIFY TIRE POSITION DURING DRIVING

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Drive the vehicle at 40 km/h (25 mph) or more for 10 to 30 minutes in 1 trip.

HINT:

Do not drive the vehicle in reverse gear while performing Tire Position Identification. If the vehicle is driven in reverse gear while performing Tire Position Identification, identification information will be discarded and Tire Position Identification may take longer than usual.

(d) Turn the Techstream on.

(e) Enter the following menus: Chassis / Tire Pressure Monitor / Data List.

(f) Without turning off the ignition switch, check the tire position for each transmitter.

Chassis > Tire Pressure Monitor > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

ID 1 Tire Position

ID1 Tire Position

No Information or FL or FR or RL or RR or Spare or Judging

ID1 tire position is displayed

If no tire position information is stored, "No Information" will be displayed.

ID 2 Tire Position

ID2 Tire Position

No Information or FL or FR or RL or RR or Spare or Judging

ID2 tire position is displayed

If no tire position information is stored, "No Information" will be displayed.

ID 3 Tire Position

ID3 Tire Position

No Information or FL or FR or RL or RR or Spare or Judging

ID3 tire position is displayed

If no tire position information is stored, "No Information" will be displayed.

ID 4 Tire Position

ID4 Tire Position

No Information or FL or FR or RL or RR or Spare or Judging

ID4 tire position is displayed

If no tire position information is stored, "No Information" will be displayed.

Result

Proceed to

A transmitter with its tire position as "Judging" exists.

A

No transmitter with its tire position as "Judging" exists, and no tire pressures are displayed on the multi-information display.

B

No transmitter with its tire position as "Judging" exists, and tire pressures are displayed on the multi-information display.

C

B

GO TO TIRE PRESSURE WARNING LIGHT CIRCUIT INSPECTION PROCEDURE

C

END

A

4.

CHECK TIRE PRESSURE WARNING VALVE AND TRANSMITTER

(a) Without turning off the ignition switch, check each transmitter with its tire position displayed as "Judging".

(b) Enter the following menus: Chassis / Tire Pressure Monitor / Data List.

(c) Without turning off the ignition switch, check the condition of each transmitter.

Chassis > Tire Pressure Monitor > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Failure History of Tire Position Identification (Transmitter ID 1 Error) (Latest)

Failure History of Tire Position Identification (Transmitter ID 1 Error) (Latest)

Normal or Abnormal

Normal

-

Failure History of Tire Position Identification (Transmitter ID 2 Error) (Latest)

Failure History of Tire Position Identification (Transmitter ID 2 Error) (Latest)

Normal or Abnormal

Normal

-

Failure History of Tire Position Identification (Transmitter ID 3 Error) (Latest)

Failure History of Tire Position Identification (Transmitter ID 3 Error) (Latest)

Normal or Abnormal

Normal

-

Failure History of Tire Position Identification (Transmitter ID 4 Error) (Latest)

Failure History of Tire Position Identification (Transmitter ID 4 Error) (Latest)

Normal or Abnormal

Normal

-

OK:

"Abnormal" is not displayed.

NG

REPLACE CORRESPONDING TIRE PRESSURE WARNING VALVE AND TRANSMITTER

OK

5.

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.

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

OK

IDENTIFY TIRE POSITION DURING DRIVING AGAIN

NG

CHECK IF ANY DEVICE IS INSTALLED BY USER

    Test Mode Procedure

    Tire Pressure Warning Light Circuit

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