Lexus ES: Initialization not Completed (C2177)

Lexus ES (XZ10) Service Manual / Suspension / Tire Pressure Monitoring / Tire Pressure Warning System (for Hv Model) / Initialization not Completed (C2177)

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.
The tires are rotated.
A new vehicle is delivered.

Tire pressure warning initialization is performed when the power switch is on (IG), "Set Pressure" is selected on the multi-information display and the "OK" switch (steering pad switch assembly) is pressed and held.

When an initialization request signal is received, the tire pressure warning ECU and receiver blinks the tire pressure warning light in the combination meter assembly 3 times and registers the tire pressure information sent from the tire pressure warning valve and transmitters.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
C2177	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 or tire pressure warning valve and transmitter, read the transmitter IDs and number of the transmitters (4 or 5) 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.
If initialization is performed using the Techstream when the Data List is displayed for 10 minutes or more, initialization will not complete and the tire pressure warning ECU and receiver stores DTC C2177.

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 for 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.

CHECK IF ANY DEVICE IS INSTALLED BY USER

2.	PERFORM INITIALIZATION

(a) Perform initialization.

Click here

3.	CONFIRM TIRE INFLATION PRESSURE (DATA LIST)

(a) Turn the power switch off.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

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

(f) Read the Data List according to the display on 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.*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

HINT:

*1: 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.

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

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

END

GO TO DTC (C2121 TO C2124)

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