2007 Lexus LS 460FACTORY OEM SERVICE PROCEDURE

Repair Instruction: Initialization

Procedures necessary when battery terminal is disconnected / reconnected 

PROCEDURES FOR BATTERY TERMINAL DISCONNECTED/RECONNECTED

Necessary Procedures Procedure Details Effects / Inoperative Functions When Necessary Procedures are not Performed Notes
Navigation system (for DVD) initialization After turning the engine switch ON (IG), insert the map disc. Navigation system (for DVD) If the map disc is inside when disconnecting the cable from the battery terminal, this procedure is not necessary
Correction of steering angle neutral point Fully turn the steering wheel to the right and left. Parking guidance function -
Rear curtain position reset operation
  1. Turn the engine switch ON (IG).
  2. Push the front or rear switch's rear door sunshade switch twice.
 Rear curtain -
Reset luggage compartment door close position Close the luggage compartment door fully to turn off the courtesy switch. Power trunk lid function If the luggage compartment door is closed when disconnecting the cable from the battery terminal, it is not necessary to reset it
NOTE: After the engine switch is turned off, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the engine switch off, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.

Procedures necessary when ECU or other parts are replaced 

PROCEDURES FOR ECU OR OTHER PARTS REPLACEMENT

Replacement Part Necessary Procedures Effects / Inoperative Functions When Necessary Procedures are not Performed Notes
Automatic transmission assembly
  • Set transmission compensation code
  • Learning by driving (Road test)
  • Reset memory
  • Large shift shock
  • Engine overruns
 -
  • Valve body assembly
  • Shift solenoid valve SL1, 2, 3, 4, 5
 Learning by driving (Road test)
  • Large shift shock
  • Engine overruns
 -
TCM
  • Set transmission compensation code
  • Learning by driving (Road test)
  • Large shift shock
  • Engine overruns
 -
  • Engine assembly
  • ECM
  • Reset memory
  • Learning by driving (Road test)
  • Large shift shock
  • Engine overruns
 -
  • Suspension control ECU
  • Height control sensor
 Vehicle height offset calibration Vehicle height sensor data may be affected due to installation position, or vehicle height recognition may be erroneous May also occur when vehicle height is uneven due to deterioration over time
Tire pressure warning ECU
  1. Register transmitter IDs
  2. Initialize tire pressure warning system
  • When DTC detection conditions of "transmitter ID not received" DTC is met, TPMS indicator blinks for 1 minute, and then illuminates
  • Tire pressure monitoring function
 -
Tire pressure warning valve and transmitter
  1. Register transmitter IDs
  2. Initialize tire pressure warning system
  • When DTC detection conditions of "transmitter ID not received" DTC is met, TPMS indicator blinks for 1 minute, and then illuminates
  • Tire pressure monitoring function of replaced wheel
 Even if only one wheel is replaced, IDs for all 5 wheels must be registered
Skid control ECU
  • Initialize linear solenoid valve and perform calibration
  • Perform yaw rate and acceleration sensor zero point calibration
  • Brake warning light / yellow (minor malfunction) illumination
  • Brake warning light / red (malfunction)
  • ABS warning light illumination VSC warning display of multi-information display
  • Master warning light illumination
 -
Brake actuator
  1. Bleed air
  2. Clear stored value of linear solenoid valve and calibration data
  3. Initialize linear solenoid valve and perform calibration
 Brake does not operate properly -
  • Brake pedal stroke sensor
  • Brake pedal
  1. Inspect and adjust brake pedal height
  2. Adjust brake pedal stroke sensor
  3. Clear stored value of linear solenoid valve and calibration data
  4. Initialize linear solenoid valve and perform calibration
  • Brake warning light / yellow (minor malfunction) illumination
  • Brake warning light / red (malfunction)
  • ABS warning light illumination
  • Master warning light illumination
 -
Yaw rate and acceleration sensor
  1. Clear zero point calibration data
  2. Perform yaw rate and acceleration sensor zero point calibration
  • Brake warning light / yellow (minor malfunction) illumination
  • Brake warning light / red (malfunction)
  • ABS warning light illumination VSC warning display of multi-information display
  • Master warning light illumination
  • VSC control is prohibited or operation is incorrect
  • VGRS system
 -
Electric parking brake ECU
  • Reset memory
  • Acquire tension sensor zero point
 Electric parking brake does not operate normally -
Electric parking brake actuator
  • Reset memory
  • Acquire tension sensor zero point
  • Parking brake bedding
  • Electric parking brake does not operate normally
  • Parking brake performance may not be normal
 -
  • Rear disc
  • Parking brake shoe
 Parking brake bedding Parking brake performance may not be normal -
  • Steering control ECU
  • Steering column
  • Steering intermediate shaft
 Actuator angle neutral point calibration and initialization Steering wheel off-center -
  • Object recognition ECU
  • Object recognition camera sensor
 Adjust object recognition camera DTC C1A22 or C1A23 is output -
Power steering gear assembly
  • Actuator angle neutral point calibration and initialization
  • Rotation angle sensor value initialization
  • Torque sensor zero point calibration
  • VGRS system calibration procedure
  • Steering wheel off-center
  • Difference in amount of steering assist between left and right
 -
Power steering ECU
  • Rotation angle sensor value initialization
  • Torque sensor zero point calibration
  • Steering wheel off-center
  • Difference in amount of steering assist between left and right
 -
Occupant classification ECU
  • Perform zero point calibration
  • Registration ECU data
  • Occupant classification system
  • Passenger airbag ON/OFF indicator
  • Airbag system (Front passenger side)
  • Seat belt warning system (Front passenger side)
 -
  • ID code box
  • Steering lock ECU
  • ECM
  • Key
  • Certification ECU
 Registration
  • Wireless door lock operation
  • Entry operation
  • Engine starting
  • Steering unlock
 -
Front millimeter wave radar sensor Adjust front millimeter wave radar sensor DTC C1A11 or C1A14 is output -
Steering angle sensor connector Correction of steering angle neutral point Parking guidance function -
Television camera Television camera optical axis (Camera position setting) Vehicle width extension lines and expected course are deviated -
Parking assist ECU
  • Correction of steering angle neutral point
  • Store left and right maximum steering angle
  • Television camera optical axis (Camera position setting)
  • Vehicle width extension lines and expected course are deviated
  • Parking assist function
 -
Mayday ECU
  • Mayday ECU initialization
  • Mayday ECU registration / enrollment
 LEXUS link system -
Mayday battery
  • Mayday battery registration
  • Mayday battery confirmation
 DTC 6-1 remains output -
Power window regulator motor (All doors) Initialize power window control system
  • AUTO UP / DOWN
  • Jam protection
  • Key-off
 When the battery is replaced, it is not necessary to initialize the power window regulator motor
Inner rear view mirror
  • Compass zone setting
  • Compass calibration
 Direction is not displayed correctly -
  • Front power seat switch (Seat ECU)
  • Front seat adjuster
  • Position control ECU
  • Rear seat adjuster
 Position sensor initialization
  • During manual operation, buzzer sounds
  • Memory function does not operate
  • Interference stop control does not operate normally
  • Linked control does not operate normally
 -
  • RR MPX-B1 fuse
  • Luggage closer motor assembly
 Reset luggage compartment door close position Power trunk lid function -
  • Rear door ECU LH
  • Rear door ECU RH
 Rear curtain position reset operation Rear curtain -
  • Sliding roof drive gear (Sliding roof ECU)
  • Sliding roof housing
  • Sliding roof glass
 Initialize sliding roof system
  • Auto operation
  • Jam protection function
  • Sliding roof operation after engine switch is turned off
  • Wireless door lock control function
  • Key-linked operation function (Driver's door only)
  • Entry lock switch-linked operation
 -
  1. PERFORM ROAD TEST TO ALLOW TCM TO LEARN 
    CAUTION:
    • Perform the following procedures while strictly observing all traffic laws and speed limits.
    • Do not accelerate or decelerate rapidly.
    1. "Road test" procedure is as follows:
      1. Warm up the engine.
      2. According to the replacement parts, perform the road test shown below.
        ROAD TEST PROCEDURE

        Replacement Parts Road Test
        • Automatic transmission assembly
        • TCM
        • Valve body assembly
        • Shift solenoid valve SL3
        • Engine assembly
        • ECM
        		 Perform pattern 1 and 2
        Pattern 1:*1 
        With shift lever on D, after gradually accelerating to approx. 50 km/h (31 mph) or more, gradually decelerate to approx. 30 km/h (19 mph)
        Pattern 2:*2 
        With shift lever on S4, after gradually accelerating to approx. 30 km/h (19 mph) or more, gradually decelerate to approx. 10 km/h (6 mph)
        • Shift solenoid valve SL1
        • Shift solenoid valve SL2
        • Shift solenoid valve SL4
        • Shift solenoid valve SL5
        		 Pattern 1:*1 
        With shift lever on D, after gradually accelerating to approx. 50 km/h (31 mph) or more, gradually decelerate to approx. 30 km/h (19 mph)
        HINT:
        • *1: After gradually accelerating a distance of approximately 130 m (426.4 ft.) for a period of approximately 15 seconds, gradually decelerate a distance of approximately 45 m (147.6 ft.) for a period of approximately 5 seconds.
        • *2: After gradually accelerating a distance of approximately 40 m (131.2 ft.) for a period of approximately 8 seconds, gradually decelerate a distance of approximately 20 m (65.6 ft.) for a period of approximately 4 seconds.
        • When decelerating, apply the brakes as necessary to adjust the vehicle speed.
        Fig 1: Road Test Pattern
        G04948275Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT:

        • *1: The speed, time and distance values are approximate values.
        • *2: After accelerating, the deceleration does not need to be performed immediately.
      3. Repeat until the shift shock and engine speed overrun settles down.
        NOTE: Before repeating tests, stop the vehicle once, and then start moving the vehicle again.
  2. RESET MEMORY 
    NOTE:
    • Perform the RESET MEMORY (AT initialization) when replacing the engine assembly or ECM.
    • The RESET MEMORY can be performed only with the intelligent tester.
    • RESET MEMORY cannot be completed by only reconnecting the cable to the negative (-) battery terminal.

    HINT:

    The TCM memorizes the vehicle conditions when the ECT controls the automatic transmission assembly and engine assembly.

    1. "RESET MEMORY" procedure is as follows:
      1. Turn the engine switch OFF.
      2. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
      3. Turn the engine switch ON (IG).
      4. Turn the intelligent tester ON.
      5. Enter the following menus: DIAGNOSIS / OBD/ MOBD / ECT / RESET MEMORY.
        NOTE: After performing the RESET MEMORY, be sure to perform the ROAD TEST  described previously.
  3. SET TRANSMISSION COMPENSATION CODE INTO TCM  (step  1)
    NOTE:
    • When the automatic transmission is replaced, the transmission compensation code must be input into the TCM (Proceed to step  1).

      After the automatic transmission is reinstalled, the Quick Response (QR) code label will be positioned where the code cannot be read. Therefore, before reinstalling the automatic transmission, record the transmission compensation codes or input them in the intelligent tester.

    • Transmission compensation codes are unique, 60-digit alphanumeric values printed on the QR label. If an incorrect transmission compensation code is input into the TCM, shift shock may occur.
    1. Record the transmission compensation code specified on the QR label.
      Fig 2: Identifying Transmission Compensation Code
      G04948274Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      The transmission compensation code is imprinted on the QR label.

    2. Move the shift lever to the N or P position.
    3. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
    4. Turn the engine switch ON (IG).
      NOTE: Do not start the engine.
    5. Turn the tester on.
    6. Enter the following menus: DIAGNOSIS / OBD/ MOBD / ECT / AT CODE UTILITY.
    7. Select "AT CODE REGIST". (h) Select "SET A/T CODE".
    8. Select "INPUT A/T CODE".
    9. Register the compensation code.
      1. Manually input the transmission compensation code. The code is a 60-digit alphanumeric value imprinted on the QR label.
    10. Check that the compensation code displayed on the screen is correct by comparing it with the 60-digit alphanumeric value on the QR label.
      NOTE: If an incorrect transmission compensation code is input into the TCM, shift shock will occur.

      HINT:

      Input alphabetical letters by operating the keys from 0 to 5 while pressing the * key.

    11. Set the compensation code to the TCM.
  4. TRANSFER TRANSMISSION COMPENSATION CODE  (step  2)
    NOTE:
    • When the TCM is replaced, the existing transmission compensation codes must be input into the new TCM (Proceed to step  2).
    • Transmission compensation codes are 60-digit alphanumeric values imprinted on the QR label. If an incorrect transmission compensation code is input into the TCM, shift shock may occur.

    HINT:

    The following operation is available for use with TCMs that can transmit the registered transmission compensation code to the intelligent tester.

    1. Read the transmission compensation code
      1. Move the shift lever to the N or P position.
      2. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
      3. Turn the engine switch ON (IG).
        NOTE: Do not start the engine.
      4. Turn the tester on.
      5. Enter the menu items in this order: DIAGNOSIS / OBD/MOBD / ECT / AT CODE UTILITY.
      6. Select "AT CODE REGIST".
      7. Select "READ ATT CODE".
        NOTE: Do not use the code specified on the transmission QR label even if the transmission compensation code cannot be read using the intelligent tester. The code printed on an in-service transmission may not match its current characteristics. Replace the TCM with a new one and perform a road test to allow the TCM to learn.
      8. Turn the engine switch OFF.
      9. Replace the TCM.
    2. Set the transmission compensation code
      1. Turn the engine switch ON (IG).
        NOTE: Do not start the engine.
      2. Turn the tester on.
      3. Enter the menu items in this order: DIAGNOSIS / OBD/MOBD / ECT / AT CODE UTILITY.
      4. Select "SET A/T CODE".
      5. Select "SAVED A/T CODE".
      6. Set the compensation code to the TCM.
  5. VEHICLE HEIGHT OFFSET CALIBRATION 
    NOTE:
    • Make sure that the pressure of the tires is normal.
    • Make sure that the vehicle is empty.
    • Make sure that the parking brake is released and that the shift lever is on N.
    1. PERFORM VEHICLE HEIGHT INSPECTION 
      1. Adjust the pressure of the tires.
      2. Stabilize the suspension by releasing the parking brake and bouncing the corners of the vehicle up and down.
      3. Move the shift lever to N and move the vehicle forward and rearward.
      4. Turn the engine switch OFF.
      5. Connect the intelligent tester or Techstream to the DLC3.
      6. Start the engine.
      7. Turn the tester on.
      8. Enter the following menus:
        1. Intelligent tester - Select: DIAGNOSIS / OBD/MOBD / CHASSIS / AIR SUSPENSION / DATA LIST.
        2. Techstream - select: Chassis / Air suspension / Data List.
      9. Press the height control switch and adjust the vehicle height to "HEIGHT HIGH".
      10. Press the height control switch and return the vehicle height to normal.
      11. Using the DATA LIST, confirm that the vehicle height control operation is complete.
        1. Intelligent tester

          AIR SUSPENSION 

          INTELLIGENT TESTER AIR SUSPENSION

          Tester Display Measurement Item/Range Normal Condition Diagnosis Note
          HEIGHT CTRL Vehicle height control condition reading/ ON or OFF ON: Vehicle height control operating
          OFF: Vehicle height control not operating          		 -
        2. Techstream

          Air suspension 

          TECHSTREAM AIR SUSPENSIONS

          Tester Display Measurement Item/Range Normal Condition Diagnosis Note
          Height Control Vehicle height control condition reading/ ON or OFF ON: Vehicle height control operating
          OFF: Vehicle height control not operating          		 -
      12. Using the intelligent tester or Techstream
        1. Intelligent tester

          Enter the following menus: DIAGNOSIS / OBD/ MOBD / CHASSIS / AIR SUSPENSION / DATA LIST. Then read and write the values for "ADJUST" and "AFTER ADJUST" for each wheel.

          AIR SUSPENSION 

          INTELLIGENT TESTER AIR SUSPENSION

          Tester Display Measurement Item/Range Normal Condition Diagnosis Note
          FR ADJUST Display of vehicle height offset recorded value of front right wheel / min.: -3276.8 mm (-129 in.) max.: 3276.7 mm (129 in) - -
          FL ADJUST Display of vehicle height offset recorded value of front left wheel / min.:-3276.8 mm (-129 in.) max.: 3276.7 mm (129 in.) - -
          RR ADJUST Display of vehicle height offset recorded value of rear right wheel / min.: -3276.8 mm (-129 in.) max.: 3276.7 mm (129 in.) - -
          RL ADJUST Display of vehicle height offset recorded value of rear left wheel / min.:-3276.8 mm (-129 in.) max.: 3276.7 mm (129 in.) - -
          FR AFTER ADJUST Display of after-calibration vehicle height value of front right wheel / min.: -3276.8 mm (-129 in.) max.: 3276.7 mm (129 in.) When vehicle height normal: 0 +/-20 mm (0 +/-0.79 in.)
          When vehicle height is changing: Varies based on vehicle height
          After HEIGHT HIGH adjustment: 20 +/- 20 mm (0.79 +/- 0.79 in.)          		 -
          FL AFTER ADJUST Display of after-calibration vehicle height value of front left wheel / min.: -3276.8 mm (-129 in.) max.: 3276.7 mm (129 in.) When vehicle height normal: 0 +/-20 mm (0 +/-0.79 in.)
          When vehicle height is changing: Varies based on vehicle height
          After HEIGHT HIGH adjustment: 20 +/- 20 mm (0.79 +/- 0.79 in.)          		 -
          RR AFTER ADJUST Display of after-calibration vehicle height value of rear right wheel / min.: -3276.8 mm (-129 in.) max.: 3276.7 mm (129 in.) When vehicle height normal: 0 +/-20 mm (0 +/-0.79 in.)
          When vehicle height is changing: Varies based on vehicle height
          After HEIGHT HIGH adjustment: 20 +/- 20 mm (0.79 +/- 0.79 in.)          		 -
          RL AFTER ADJUST Display of after-calibration vehicle height value of rear left wheel / min.: -3276.8 mm (-129 in.) max.: 3276.7 mm (129 in.) When vehicle height normal: 0 +/-20 mm (0 +/-0.79 in.)
          When vehicle height is changing: Varies based on vehicle height
          After HEIGHT HIGH adjustment: 20 +/- 20 mm (0.79 +/- 0.79 in.)          		 -
        2. Techstream

          Enter the following menus: Chassis / Air suspension / Data List /. Then read and write the values for "After Height Adjust" and "Height Adjust" for each wheel.

          Air suspension 

          TECHSTREAM AIR SUSPENSION

          Tester Display Measurement Item/Range Normal Condition Diagnosis Note
          FR Height Adjust Display of vehicle height offset recorded value of front right wheel / min.: -3276.8 mm (-129 in.) max.: 3276.7 mm (129 in.) - -
          FL Height Adjust Display of vehicle height offset recorded value of front left wheel / min.: -3276.8 mm (-129 in.) max.: 3276.7 mm (129 in.) - -
          RR Height Adjust Display of vehicle height offset recorded value of rear right wheel / min.: -3276.8 mm (-129 in.) max.: 3276.7 mm (129 in.) - -
          RL Height Adjust Display of vehicle height offset recorded value of rear left wheel / min.: -3276.8 mm (-129 in.) max.: 3276.7 mm (129 in.) - -
          FR After Height Adjust Display of after-calibration vehicle height value of front right wheel / min.: -3276.8 mm (-129 in.) max.: 3276.7 mm (129 in.) When vehicle height normal: 0 +/-20 mm (0 +/-0.79 in.)
          When vehicle height is changing: Varies based on vehicle height
          After HEIGHT HIGH adjustment: 20 +/- 20 mm (0.79 +/- 0.79 in.)          		 -
          FL After Height Adjust Display of after-calibration vehicle height value of front left wheel / min.:-3276.8 mm (-129 in.) max.: 3276.7 mm (129 in.) When vehicle height normal: 0 +/-20 mm (0 +/-0.79 in.)
          When vehicle height is changing: Varies based on vehicle height
          After HEIGHT HIGH adjustment: 20 +/- 20 mm (0.79 +/- 0.79 in.)          		 -
          RR After Height Adjust Display of after-calibration vehicle height value of rear right wheel / min.: -3276.8 mm (-129 in.) max.: 3276.7 mm (129 in.) When vehicle height normal: 0 +/-20 mm (0 +/-0.79 in.)
          When vehicle height is changing: Varies based on vehicle height
          After HEIGHT HIGH adjustment: 20 +/- 20 mm (0.79 +/- 0.79 in.)          		 -
          RL After Height Adjust Display of after-calibration vehicle height value of rear left wheel / min.: -3276.8 mm (-129 in.) max.: 3276.7 mm (129 in.) When vehicle height normal: 0 +/-20 mm (0 +/-0.79 in.)
          When vehicle height is changing: Varies based on vehicle height
          After HEIGHT HIGH adjustment: 20 +/- 20 mm (0.79 +/- 0.79 in.)          		 -
      13. Turn the engine switch OFF.
      14. Perform the vehicle height inspection.

        Standard vehicle height 

        STANDARD VEHICLE HEIGHT

        Vehicle Specification Front (Measured height A minus B) Rear (Measured height D minus C)
        18 in. Wheel 98 mm (3.86 in.) 93 mm (3.66 in.)
        19 in. Wheel 98 mm (3.86 in.) 93 mm (3.66 in.)
        Fig 3: Inspecting Vehicle Height Measurements
        G04944111Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Measuring points: 

        1. Ground clearance of front wheel center 
        2. Ground clearance of front suspension lower No. 2 arm assembly front bush installation bolt head rear 
        3. Ground clearance of protrusion of rear suspension arm attachment (lower No. 2 installation cam bolt) 
        4. Ground clearance of rear wheel center 
    2. PERFORM VEHICLE HEIGHT OFFSET CALIBRATION 
      NOTE: The possible vehicle height automatic adjustment value is 20 mm (0.78 in.). If the "Height Adjust" value + (Standard value - Measurement value - "After Height Adjust" value) is 20 mm (0.78 in.) or more, first perform the vehicle height adjustment (height control link adjustment).
      1. Turn the engine switch OFF.
      2. Connect the intelligent tester or Techstream to the DLC3.
      3. Turn the engine switch ON (IG).
      4. Turn the tester on.
      5. Enter the following menus:
        1. Intelligent tester-Select: DIAGNOSIS/OBD/MOBD / CHASSIS / AIR SUSPENSION / HEIGHT OFFSET.
        2. Techstream - Select: Chassis / Air suspension / Utility / Height Offset.
      6. For each wheel, follow the instructions on the tester screen and input the input value to complete the vehicle height offset calibration.

        HINT:

        Input value = "Height Adjust" value + (Standard value - Measurement value - "After Height Adjust" value)

      7. Start the engine.
      8. In the DATA LIST, enter "HEIGHT CTRL" or "Height Control".
      9. Press the height control switch and adjust the vehicle height to "HEIGHT HIGH".
      10. Press the height control switch and return the vehicle height to normal.
      11. Using the DATA LIST, confirm that the vehicle height control operation is complete.
        1. Intelligent tester

          AIR SUSPENSION 

          INTELLIGENT TESTER AIR SUSPENSION

          Tester Display Measurement Item/Range Normal Condition Diagnosis Note
          HEIGHT CTRL Vehicle height control condition reading/ ON or OFF ON: Vehicle height control operating
          OFF: Vehicle height control not operating          		 -
        2. Techstream

          Air suspension 

          TECHSTREAM AIR SUSPENSION

          Tester Display Measurement Item/Range Normal Condition Diagnosis Note
          Height Control Vehicle height control condition reading/ ON or OFF ON: Vehicle height control operating
          OFF: Vehicle height control not operating          		 -
      12. Turn the engine switch OFF.
      13. Perform the vehicle height inspection. Check that the result is within +/-14.3 mm (+/-0.56 in.) of the standard value.

    NEXT: END 

  6. 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.
        • Read the registered transmitter IDs that are stored in the old ECU using the intelligent tester or Techstream and note them down.
        • 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.
        • Take a note of the 7 digit number (transmitter ID) written on the tire pressure warning valve and transmitter.
          Fig 4: Identifying Transmitter ID
          G04944270Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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