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Home >> Lexus >> 2009 >> LS 460 AWD V8-4.6L (1UR-FSE) >> Repair and Diagnosis >> Testing and Inspection >> Repair Instruction - Initialization >> Part 2

Part 2








INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION

INITIALIZATION

6. TIRE PRESSURE WARNING SYSTEM (REGISTRATION)
(a) DESCRIPTION OF CODE REGISTRATION
It is necessary to register the transmitter ID in the tire pressure warning ECU when replacing the tire pressure warning valve and transmitter and/or tire pressure warning ECU.
Prepare all transmitter ID data before starting registration.
(1) Before registration
1 In case of tire pressure warning ECU replacement.
1 Read the registered transmitter IDs that are stored in the old ECU using the Techstream and note them down.
2 If reading stored transmitter IDs is impossible due to malfunctions of components such as the tire pressure warning antenna and receiver, remove the tires from the wheels and check the IDs located on the tire pressure warning valves and transmitters.

2 In case of tire pressure warning valve and transmitter replacement.
1 Take a note of the 7 digit number (transmitter ID) written on the tire pressure warning valve and transmitter.




NOTE:
The transmitter ID is written on the tire pressure warning valve and transmitter. It will be unable to be read after installing the tire pressure warning valve and transmitter on the tire and wheel. Therefore, take a note of the transmitter ID before installing the tire pressure warning valve and transmitter.

(b) REGISTER TRANSMITTER ID
(1) Set the air pressure of all wheels to the specified value.
(2) Turn the engine switch OFF.
(3) Connect the Techstream to the DLC3.
(4) Turn the engine switch ON (IG) and the tester ON.
(5) Enter the menu items in this order: Chassis / Tire Pressure Monitor / Utility / ID Registration /
(6) Perform the procedures displayed on the Techstream.
(7) "UTILITY REGIST TIRE SET" screen is displayed. Then, press "YES".
(8) "UTILITY REGIST TIRE SET" screen is displayed. Then, press "ENTER".
(9) Confirmation of transmitter ID registration.
1 Enter the menu items in this order: DIAGNOSIS / OBD/MOBD / CHASSIS / TIRE PRESSURE / DATA LIST.
2 Read the "TIRE PRESS" values.
NOTICE:
- It may take up to about 2 or 3 minutes to update the tire pressure data. If the values are not displayed after a few minutes, perform troubleshooting according to the inspection procedure for DTCs C2121/21 to C2125/25.
- If the IDs have not been registered, DTC C2171/71 is set in the tire pressure warning ECU after 3 minutes or more.
- If normal pressure values are displayed, the IDs have been registered correctly.
- If the tire pressure values are not displayed after a few minutes, the IDs may be incorrect or the system may have a malfunction.
- The tire pressure information reception condition can also be confirmed through the multi-information display's tire pressure display screen.
- After all IDs are registered, DTC C2126/26 is set in the tire pressure warning ECU and the tire pressure warning light blinks for 1 minute and then comes on. When the tire pressure warning ECU successfully receives radio waves from all the transmitters whose IDs are stored in the ECU, DTC C2126/26 is deleted and the tire pressure warning light goes off.

7. TIRE PRESSURE WARNING SYSTEM (INITIALIZATION)
(a) INITIALIZATION PROCEDURE
(1) Turn the engine switch on (IG).
(2) Press and hold the tire pressure warning reset switch for 3 seconds or more so that the tire pressure warning light blinks 3 times.




(3) Turn the engine switch off.
(4) Connect the Techstream to the DLC3.
(5) Turn the engine switch on (IG) and the Techstream on.
(6) Turn the engine switch on (IG) and the Techstream on.
(7) Check that the initialization has been completed.
(8) Confirm that the tire pressure data of all tires is displayed on the Techstream screen.
NOTICE:
- The initialization is normally completed within 2 to 3 minutes.
- If the initialization has not been completed successfully, DTC C2177/77 is set after a vehicle speed of 8 km/h (5 mph) or more continues for 20 minutes or more.
- While in test mode, the system will not change to initialization mode even if the tire pressure warning reset switch is pushed.
- The initialization can be terminated by connecting terminals 13 (TC) and 4 (CG) of the DLC3.





Tire Pressure Monitor





HINT:
- The initialization is complete when the Data List "ID Tire Inflation Pressure" display shows the correct pressures.
- *: It may take about 2 or 3 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 C2121/21 to C2125/25.

(b) INITIALIZATION PROCEDURE (MULTI-INFORMATION DISPLAY)
(1) Turn the engine switch on (IG).
(2) Press and hold the tire pressure warning reset switch for 3 seconds or more so that the tire pressure warning light blinks 3 times.




HINT:
- The initialization can be confirmed through the multi-information display.




- The order in which the data is received is random.
- If the signals from all the wheels are received, the initialization is complete.
- It may take about 2 or 3 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 C2121/21 to C2125/25.
NOTICE:
- If the initialization has not been completed successfully, DTC C2177/77 is set after a vehicle speed of 8 km/h (5 mph) or more continues for 20 minutes or more.
- The initialization can be terminated by connecting terminals 13 (TC) and 4 (CG) of the DLC3.





8. ELECTRONICALLY CONTROLLED BRAKE SYSTEM (INITIALIZATION)
(a) DESCRIPTION
(1) Perform initialization of linear solenoid valve and calibration when the skid control ECU, brake actuator or brake pedal stroke sensor is replaced.
Follow the procedure to perform initialization.
HINT:
- If there is a problem with battery (12 V) voltage, initialization of linear solenoid valve and calibration cannot be completed normally. Check the battery voltage before performing initialization of linear solenoid valve and calibration.
- If the actuator's temperature is high, initialization of linear solenoid valve and calibration may not be completed normally. If so, wait until the temperature drops and then perform initialization of linear solenoid valve and calibration.
- If the engine switch is turned off, the brake pedal is operated or the vehicle speed is input while the linear solenoid valve offset learning is being performed, the learning will be canceled.





(b) CLEAR STORED VALUE OF INITIALIZATION OF LINEAR SOLENOID VALVE AND CALIBRATION (WHEN USING TECHSTREAM)
(1) Connect the Techstream to the DLC3.
(2) Move the shift lever to the P position.
(3) Turn the engine switch on (IG) with the brake pedal released.
(4) Clear the stored value of initialization of linear solenoid valve and calibration following the screen.
HINT: Refer to the Techstream operator's manual for further details.

(c) CLEAR STORED VALUE OF INITIALIZATION OF LINEAR SOLENOID VALVE AND CALIBRATION (WHEN USING the Techstream)
(1) Connect the Techstream to the DLC3.
(2) Move the shift lever to the P position.
(3) Turn the engine switch ON (IG) with the brake pedal released.
(4) Clear the stored value of initialization of linear solenoid valve and calibration following the screen.
HINT: Refer to the Techstream operator's manual for further details.

(d) PERFORM INITIALIZATION OF LINEAR SOLENOID VALVE AND CALIBRATION (WHEN USING the Techstream)
(1) Connect the Techstream (with CAN VIM) to the DLC3.
(2) Move the shift lever to the P position.
(3) Turn the engine switch ON (IG) with the brake pedal released.
NOTICE:
- If the linear solenoid valve offset learning is performed without turning the engine switch on (IG), the learning process may not be completed properly because of insufficient battery voltage.
- When the linear solenoid valve offset learning is interrupted, or the learning process is performed with the shift lever not in the P position, DTC C1345/66 will be stored.
(4) Set the Techstream to Test Mode (select "ABS/VSC/TRAC", "Utility").
HINT: Refer to the Techstream operator's manual for further details.
(5) Leave the vehicle stationary without depressing the brake pedal for 1 or 2 minutes.




(6) Check that the interval between blinks of the brake warning light / yellow (minor malfunction) changes from 1 second to 0.25 second.
- The time needed to complete initialization of linear solenoid valve and calibration varies depending on battery voltage.
- The brake warning light / yellow (minor malfunction) blinks at 1 second intervals during the initialization of linear solenoid valve and calibration. After it is complete, the brake warning light / yellow (minor malfunction) changes to the Test Mode display, and blinks at 0.25 second intervals.
(7) When the brake warning light / yellow (minor malfunction) changes to the Test Mode display, check that DTC C1345/66, which indicates trouble with stroke sensor zero point learning, is not output.
(8) Enter the normal mode from the Test Mode following the Techstream prompts.
HINT: Refer to the Techstream operator's manual for further details.

(e) CLEAR STORED VALUE OF INITIALIZATION OF LINEAR SOLENOID VALVE AND CALIBRATION (WHEN USING SST CHECK WIRE)




(1) Move the shift lever to the P position.
(2) Turn the engine switch ON (IG) with the brake pedal released.
(3) Using SST, connect and disconnect terminals 12 (TS) and 4 (CG) of the DLC3 4 times or more within 8 seconds.
SST: 09843-18040
(4) Check that no codes other than ABS code 42, VSC code 45 and electronically controlled brake system code 48, 66, or 95 are stored in the diagnostic system.




HINT: The ABS warning light and multi-information display do not indicate the normal system code.

(f) PERFORM INITIALIZATION OF LINEAR SOLENOID VALVE AND CALIBRATION (WHEN USING SST CHECK WIRE)
(1) Turn the engine switch OFF.




(2) Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.
SST: 09843-18040
(3) Move the shift lever to the P position.
(4) Turn the engine switch ON (IG) with the brake pedal released.
NOTICE:
- If the linear solenoid valve offset learning is performed without turning the engine switch on (IG), the learning process may not be completed properly because of insufficient battery voltage.
- When the linear solenoid valve offset learning is interrupted, or the learning process is performed with the shift lever not in the P position, DTC C1345/66 will be stored.
(5) Leave the vehicle stationary without depressing the brake pedal for 1 or 2 minutes.




(6) Check that the interval between blinks of the brake warning light / yellow (minor malfunction) changes from 1 second to 0.25 seconds.
- The time needed to complete initialization of linear solenoid valve and calibration varies depending on the battery voltage.
- The brake warning light / yellow (minor malfunction) blinks at 1 second intervals during the initialization of linear solenoid valve and calibration. After it is complete, the brake warning light / yellow (minor malfunction) changes to the Test Mode display, and blinks at 0.25 second intervals.
(7) When the brake warning light / yellow (minor malfunction) changes to the Test Mode display, check that DTC C1345/66, which indicates trouble with stroke sensor zero point learning, is not output.
(8) Turn the engine switch off and disconnect SST from the DLC3.
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