Lexus ES: Initialization
INITIALIZATION
NOTICE:
- Initialization can be confirmed through the tire pressure warning light.
- If the power switch is turned off during initialization, the tire pressure warning ECU and receiver memorizes that initialization was being performed. Therefore, it is not necessary to perform the initialization procedure again after turning the power switch on (IG).
- The order in which the data is received is random.
- If the signals from all the tire pressure warning valve and transmitters are received, initialization is completed.
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Initialization is completed when the Data List "ID Tire Inflation Pressure" display shows the correct pressures.
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Initialization is normally completed within a few minutes.
However, it may take 10 minutes or more until the tire pressure of the tire inflation pressure display function is shown (Tire Inflation Pressure Display Function).
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It may take a few minutes until the values are displayed. If the values are not displayed after a few minutes, perform troubleshooting according to the inspection procedure for DTCs C2121 to C2124.
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- If initialization has not been completed successfully, DTC C2177 is stored after a vehicle speed of 40 km/h (25 mph) or more is detected for 20 minutes or more.
- During test mode (sensor check mode), the system will not change to initialization mode even if the initialization procedure is performed.
- If initialization is performed, the existing tire positions will be cleared, but will be automatically identified when the vehicle is driven at 40 km/h (25 mph) or more for 10 to 30 minutes (Tire Inflation Pressure Display Function).
- If the Data List is displayed for 10 minutes or more using the Techstream during initialization, initialization will not complete and the tire pressure warning ECU and receiver will store DTC C2177.
BEFORE INITIALIZATION
(a) Set the tire pressure to the specified value.
NOTICE:
Refer to the link as the procedure for adjusting the tire pressures differs depending on the temperature of the tires.
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HINT:
The tire pressure warning system illuminates the tire pressure warning light to warn the driver when any of the following condition is met:
- The tire pressure drops to approximately 75% or less of the tire pressure set when system initialization was performed using the steering pad switch assembly.
INITIALIZATION PROCEDURE
(a) Turn the power switch on (IG).
(b) Select "Set Pressure" on the multi-information display and press and hold the "OK" switch (steering pad switch assembly) until the tire pressure warning light blinks 3 times.
| *1 | Tire Pressure Warning Light |
| *2 | "OK" Switch (Steering Pad Switch Assembly) |
| *a | Tire Pressure Warning Light Output Pattern |
| *b | 1 sec. |
| *c | ON |
| *d | OFF |
(c) Turn the power switch off.
(d) Connect the Techstream to the DLC3.
(e) Turn the power switch on (IG).
(f) Turn the Techstream on.
(g) Enter the following menus: Chassis / Tire Pressure Monitor / Data List.
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.
- The wheel position cannot be determined from ID1 through ID4 on the Data List.
(h) Check that initialization has been completed.
(i) Confirm that the tire pressure data of all tires is displayed on the Techstream screen.
READ NEXT:
Test Mode Procedure
TEST MODE PROCEDURE TEST MODE (SIGNAL CHECK MODE) PROCEDURE HINT:
When entering test mode (signal check mode), the tire pressure warning ECU and receiver sets all the test mode (signal check mode)
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of
Terminals Of Ecu
TERMINALS OF ECU CHECK TIRE PRESSURE WARNING ECU AND RECEIVER (a) Disconnect the N8 tire pressure warning ECU and receiver connector and measure the voltage or resistance on the wire harness side.
SEE MORE:
Inspection
INSPECTION PROCEDURE 1. INSPECT FUEL PRESSURE SENSOR (a) Check the fuel pressure sensor output voltage. (1) Apply 5 V between terminals 1 (VC) and 2 (E2). NOTICE:
Be careful when connecting the leads as the fuel pressure sensor may be damaged if the leads are connected to the wrong terminals
Fail-safe Chart
FAIL-SAFE CHART DTC Trouble Area Brake System Warning Light (Yellow) Parking Brake Indicator Light (Red) Fail-safe Deactivation Condition C1245 Deceleration sensor data malfunction Illuminates Normal 20 seconds after power switch turned off C13A0 Open in power supply rel
