TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: DESCRIPTION (2008 Sequoia)

Last Modified: 11-29-2007		1.6 C
Service Category: Suspension	Section: Tire Pressure Monitoring
Model Year: 2008	Model: Sequoia	Doc ID: RM000000Z8102VX
Title: TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: DESCRIPTION (2008 Sequoia)

DTC

C2177/77

Initialization not Completed

DESCRIPTION

Initialization is necessary if one of the following occurs: 1) the ECU is replaced; 2) the tire pressure warning valve and transmitter is replaced; 3) tires with a different tire standard pressure are installed; 4) the tires are rotated on vehicles whose front and rear tire inflation pressure standard values are different; or 5) a new vehicle is delivered.

DTC Code	DTC Detection Condition	Trouble Area
C2177/77	When all conditions below are met: During initialization Signal is not received from tire pressure warning valve and transmitter for 20 minutes or more Vehicle speed is more than 8 km/h (5 mph) for a total of 20 minutes	Tire pressure warning valve and transmitter Tire pressure warning antenna and receiver Tire pressure warning ECU Harness or connector

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

When replacing the tire pressure warning ECU, 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 after the ECU and/or valve and transmitter has been replaced.

PROCEDURE

1.	CHECK FREQUENCY RECEIVING CONDITION

(a) Check if the vehicle is in conditions such as the ones described below:

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

HINT:

If the vehicle is located in areas described above, the tire pressure warning light may blink for a minute and turn on 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 frequency may be interrupted due to surroundings or devices installed by the user.

2.	PERFORM INITIALIZATION

(a) Perform initialization .

3.	CONFIRM TIRE INFLATION PRESSURE (DATA LIST)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

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

(e) 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 / 100 kPa (1 kgf/cm², 14 psi), Relative pressure / 0 kPa (0 kgf/cm², 0 psi) max.: Absolute pressure / 449.35 kPa (4.6 kgf/cm², 65 psi), Relative pressure / 349.35 kPa (3.6 kgf/cm², 51 psi)	Actual tire inflation pressure	If 100 kPa (1 kgf/cm², 14 psi) is displayed for absolute pressure or 0 kPa (0 kgf/cm², 0 psi) is displayed for relative pressure, data has not been received*.
ID2 Tire Inflation Pressure	ID2 tire inflation pressure / min.: Absolute pressure / 100 kPa (1 kgf/cm², 14 psi), Relative pressure / 0 kPa (0 kgf/cm², 0 psi) max.: Absolute pressure / 449.35 kPa (4.6 kgf/cm², 65 psi), Relative pressure / 349.35 kPa (3.6 kgf/cm², 51 psi)	Actual tire inflation pressure	If 100 kPa (1 kgf/cm², 14 psi) is displayed for absolute pressure or 0 kPa (0 kgf/cm², 0 psi) is displayed for relative pressure, data has not been received*.
ID3 Tire Inflation Pressure	ID3 tire inflation pressure / min.: Absolute pressure / 100 kPa (1 kgf/cm², 14 psi), Relative pressure / 0 kPa (0 kgf/cm², 0 psi) max.: Absolute pressure / 449.35 kPa (4.6 kgf/cm², 65 psi), Relative pressure / 349.35 kPa (3.6 kgf/cm², 51 psi)	Actual tire inflation pressure	If 100 kPa (1 kgf/cm², 14 psi) is displayed for absolute pressure or 0 kPa (0 kgf/cm², 0 psi) is displayed for relative pressure, data has not been received*.
ID4 Tire Inflation Pressure	ID4 tire inflation pressure / min.: Absolute pressure / 100 kPa (1 kgf/cm², 14 psi), Relative pressure / 0 kPa (0 kgf/cm², 0 psi) max.: Absolute pressure / 449.35 kPa (4.6 kgf/cm², 65 psi), Relative pressure / 349.35 kPa (3.6 kgf/cm², 51 psi)	Actual tire inflation pressure	If 100 kPa (1 kgf/cm², 14 psi) is displayed for absolute pressure or 0 kPa (0 kgf/cm², 0 psi) is displayed for relative pressure, data has not been received*.

HINT:

*: It may take about 5 to 6 minutes until the values are displayed.
When no "ID Tire Inflation Pressure" has changed, rotate the tire 90 to 270°. Then recheck it.

Result

Result	proceed to
Tire pressure values are not displayed	A
All tire pressure readings are equal to specified values	B