Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Data List / Active Test

Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Immobiliser System / Data List / Active Test

DATA LIST / ACTIVE TEST

DATA LIST

NOTICE:

In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

HINT:

Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Smart Access / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Smart Access > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

# Codes

Number of trouble codes

0 to 255

Number of stored DTCs displayed

-

Immobilizer when IG=ON

Immobiliser system status when engine switch on (IG)

SET or UNSET

SET: Immobiliser system set (driver door opened and closed with engine switch on (IG))

UNSET: Immobiliser system not set with engine switch on (IG) or immobiliser system unset 40 times after immobiliser system set

-

Immobiliser

Immobiliser system status determined by certification ECU (smart key ECU assembly)*9

Set or Unset

Set: Immobiliser system set (engine start prohibited) (engine switch off)

Unset: Immobiliser system unset (engine start permitted) (engine switch on (ACC) or on (IG))
  • If "Set" is displayed, the engine start operation is prohibited.
  • When "Set" is displayed, the security indicator light blinks.
  • The security indicator light is not linked with the steering lock system.

Master Key

Matching of master key ID code and ID code registered in certification ECU (smart key ECU assembly)

Match or NoMatch

Match: ID code of master key matches ID code registered in certification ECU (smart key ECU assembly)

NoMatch: ID code of master key does not match ID code registered in certification ECU (smart key ECU assembly)

-

Sub Key

Matching of sub key ID code and ID code registered in certification ECU (smart key ECU assembly)

Match or NoMatch

Match: ID code of sub key matches ID code registered in certification ECU (smart key ECU assembly)

NoMatch: ID code of sub key does not match ID code registered in certification ECU (smart key ECU assembly)

-

BCC Malfunction

BCC signal status of transponder chip*1

OK or NG

OK: BCC signal normal

NG: BCC signal malfunction (malfunction in code computation in electrical key transmitter sub-assembly/certification ECU (smart key ECU assembly))

Problems may be caused by the following:

  • Communication errors due to wave interference (LF).
  • The electrical key transmitter sub-assembly or certification ECU (smart key ECU assembly) malfunctioning.

Abnormal Status

Transponder chip status signal*1

OK or NG

OK: Transponder chip status signal normal

NG: Transponder chip status signal malfunction (malfunction in code computation in electrical key transmitter sub-assembly/certification ECU (smart key ECU assembly))

Problems may be caused by the following:

  • Communication errors due to wave interference (LF).
  • The electrical key transmitter sub-assembly or certification ECU (smart key ECU assembly) malfunctioning.

Different Encrypt Code

Matching of transponder chip code and certification ECU (smart key ECU assembly) code*1

OK or NG

OK: Codes of transponder chip and certification ECU (smart key ECU assembly) match

NG: Codes of transponder chip and certification ECU (smart key ECU assembly) do not match

Problems may be caused by the following:

  • An electrical key transmitter sub-assembly from a different vehicle is being used.
  • The electrical key transmitter sub-assembly or certification ECU (smart key ECU assembly) malfunctioning.

Different Serial Number

Vehicle serial number*1

OK or NG

OK: Signal from transponder chip and vehicle serial number stored in the certification ECU (smart key ECU assembly) match

NG: Signal from transponder chip and vehicle serial number stored in the certification ECU (smart key ECU assembly) do not match

Problems may be caused by the following:

  • An electrical key transmitter sub-assembly from a different vehicle is being used.
  • The electrical key transmitter sub-assembly or certification ECU (smart key ECU assembly) malfunctioning.

Frame Error

State of data sent from electrical key transmitter sub-assembly

OK or NG

OK: No problem with data sent from electrical key transmitter sub-assembly

NG: Problem with data sent from electrical key transmitter sub-assembly

Problems may be caused by the following:

  • Communication errors due to wave interference.
  • The electrical key transmitter sub-assembly or certification ECU (smart key ECU assembly) malfunctioning.

Response

Electrical key transmitter sub-assembly response to signal from certification ECU (smart key ECU assembly)

OK or NG

OK: Electrical key transmitter sub-assembly responds to signal from certification ECU (smart key ECU assembly)

NG: Electrical key transmitter sub-assembly does not respond to signal from certification ECU (smart key ECU assembly)

Problems may be caused by the following:

  • A key from a different vehicle is being used.
  • The electrical key transmitter sub-assembly, certification ECU (smart key ECU assembly) or engine switch malfunctioning.

Wireless Starter Com ID

Certification between remote engine start ECU and certification ECU (smart key ECU assembly)

No Regd or Regd

No Regd: Certification between remote engine start ECU and certification ECU (smart key ECU assembly) not complete

Regd: Certification between remote engine start ECU and certification ECU (smart key ECU assembly) complete

-

Wireless C Code

Registration status between remote engine start ECU and certification ECU (smart key ECU assembly)

No Regd or Regd

No Regd: Remote starter ID not registered to remote engine start ECU and certification ECU (smart key ECU assembly)

Regd: Remote starter ID registered to remote engine start ECU and certification ECU (smart key ECU assembly)

Problems may be caused by the following:

  • DTC B2779 is stored.
  • Remote engine start ECU registration has not been performed.
  • Malfunctions in the certification ECU (smart key ECU assembly) or remote engine start ECU.

Engine Start Condition

Engine start permission from steering lock ECU (steering lock actuator or upper bracket assembly)*2

OK or NG

OK: Engine start permitted by steering lock ECU (steering lock actuator or upper bracket assembly)

NG: Engine start prohibited by steering lock ECU (steering lock actuator or upper bracket assembly)

-

ID-BOX Sleep Condition

ID code box (immobiliser code ECU) sleep mode status*9

Yes or No

Yes: ID code box (immobiliser code ECU) sleep mode possible

No: ID code box (immobiliser code ECU) sleep mode not possible

-

ID-BOX Start Condition

ID code box (immobiliser code ECU) status*3

Yes or No

Yes: Wake-up signal sent by ID code box (immobiliser code ECU)

No: Wake-up signal not sent by ID code box (immobiliser code ECU)

-

Engine Start Request

Request to certification ECU (smart key ECU assembly) to permit ECM to start engine*9

OK or NG

OK: Engine start permission request signal received by certification ECU (smart key ECU assembly)

NG: Engine start permission request signal not received by certification ECU (smart key ECU assembly)

If OK is not displayed, the immobiliser cannot be unset by the ECM.

3bit Code Request

3-bit code request condition

OK or NG

OK: 3-bit code request condition signal received

NG: 3-bit code request condition signal not received

-

S Code Check

S code verification result*5

OK or NG

OK: S code verification result normal

NG: S code verification result abnormal

Problem may be caused by the following:

  • Registration has not been performed for the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU).
  • The certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) malfunctioning.

L Code Check

L code verification result*6

OK or NG

OK: L code verification result normal

NG: L code verification result abnormal

Problem may be caused by the following:

  • Registration has not been performed for the ID code box (immobiliser code ECU) or steering lock ECU (steering lock actuator or upper bracket assembly).
  • The ID code box (immobiliser code ECU) or steering lock ECU (steering lock actuator or upper bracket assembly) malfunctioning.

Unlock Request Receive

Status of steering unlock command from certification ECU (smart key ECU assembly)*7,*9

OK or NG

OK: Certification ECU (smart key ECU assembly) sends steering unlock command (within 10 seconds of engine switch turned on (ACC) or on (IG), or of engine start operation performed)

NG: Certification ECU (smart key ECU assembly) does not send steering unlock command (engine switch not turned on (ACC) or on (IG), and engine start operation not performed)

If OK is not displayed even when the steering unlock conditions are met, the certification ECU (smart key ECU assembly) may be malfunctioning.

Lock Request Receive

Status of steering lock command from certification ECU (smart key ECU assembly)*8,*9

OK or NG

OK: Certification ECU (smart key ECU assembly) sends steering lock command (within 10 seconds of any door opened with shift lever in P and engine switch off)

NG: Certification ECU (smart key ECU assembly) does not send steering lock command (no door opened with shift lever in P and engine switch off)

If OK is not displayed even when the steering lock conditions are met, the certification ECU (smart key ECU assembly) may be malfunctioning.

S Code Check(Past)

S code verification result (past)

OK or NG(Past)

OK: Verification confirmed (past)

NG(Past): Verification not confirmed (past)

-

L Code Check(Past)

L code verification result (past)

OK or NG(Past)

OK: Verification confirmed (past)

NG(Past): Verification not confirmed (past)

-

EFI Code Receive

Certification information sent to ID code box (immobiliser code ECU) from ECM when ECM receives engine start permission signal from ID code box (immobiliser code ECU)*4,*9

OK or NG

OK: Signal from ECM to unset immobiliser received by ID code box (immobiliser code ECU)

NG: Signal from ECM to unset immobiliser not received by ID code box (immobiliser code ECU)

-

EFI Communication

State of communication to unset immobiliser between certification ECU (smart key ECU assembly) and ECM

OK or NG

OK: Communication to unset immobiliser has started between certification ECU (smart key ECU assembly) and ECM

NG: Communication to unset immobiliser has not started between certification ECU (smart key ECU assembly) and ECM

If this item displays "NG" even though the conditions to unset the immobiliser have been met and the value of Data List item "Engine Start Request" is "OK", the ECM may be malfunctioning. When the engine cannot be started, use this Data List item during troubleshooting.

B Code Difference

B code mismatch

Yes or No

Yes: Communication malfunction

No: Communication normal

-

B Code

B code registration status

Regd or No Regd

Regd: B code registered correctly

No Regd: B code not registered correctly

-

HINT:

  • *1: This indicates that there is a problem with the communication format between the electrical key transmitter sub-assembly and certification ECU (smart key ECU assembly). Wave interference, malfunction of the electrical key transmitter sub-assembly or certification ECU (smart key ECU assembly), an electrical key transmitter sub-assembly from different vehicle being used, etc. are possible causes.
  • *2: Engine start is permitted when it is confirmed that the steering is unlocked and the steering lock system is not malfunctioning. If engine start is not permitted, a steering lock ECU (steering lock actuator or upper bracket assembly) malfunction (relay, driver, etc.), an IGE circuit malfunction (wire harness or connector, ID code box (immobiliser code ECU)) or a steering lock sensor malfunction are possible causes.
  • *3: This indicates that transmission of the wake-up signal is possible ("Yes" indicates that the signal to begin verification-related LIN communication is being sent). When the steering lock motor is operating and an IGE ON signal is received (there is a steering lock operation request), or when communication is being performed between the certification ECU (smart key ECU assembly) and ECM, the display changes to "Yes".
  • *4: This indicates that the engine start permission request signal (EGST) output from the ECM is being received by the ID code box (immobiliser code ECU).
  • *5: This indicates the certification result of the certification codes of the certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU).
  • *6: This indicates the certification result of the certification codes of the ID code box (immobiliser code ECU) and steering lock ECU (steering lock actuator or upper bracket assembly).

    When the steering lock ECU (steering lock actuator or upper bracket assembly) receives an unlock request from the certification ECU (smart key ECU assembly), confirmation of the ID code box (immobiliser code ECU) L code is performed. If the L code matches, the steering lock ECU (steering lock actuator or upper bracket assembly) unlocks the steering. Also, if the S code verification result does not match, the steering lock will not be unlocked.

  • *7: The certification ECU (smart key ECU assembly) outputs a steering unlock request for 10 seconds after the engine switch is turned on (ACC) or on (IG), or an engine start operation is performed.
  • *8: The certification ECU (smart key ECU assembly) outputs a steering lock request for 10 seconds after the engine switch is turned off and any door is opened with the shift lever in P.
  • *9: Refer to the following Data List items when inspecting the actual vehicle.

    With the engine switch off and the shift lever in P, perform the following procedures and check the power source mode.

    • *1: Without depressing the brake pedal, press the engine switch and check that the power source mode changes to on (ACC).
    • *2: While depressing the brake pedal, press the engine switch and check that the engine starts.
    • *3: Press the engine switch and check that the power source mode changes to off.
    • *4: Open a door (steering lock operation starts when a door is opened).

ACTIVE TEST

HINT:

Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Smart Access / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Smart Access > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Immobiliser Indicator

Security indicator light

OFF/ON

-
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    DIAGNOSIS SYSTEM DESCRIPTION (a) The certification ECU (smart key ECU assembly) and ECM control the vehicle immobiliser system functions. Immobiliser system data and Diagnostic Trouble Codes (DTCs) ca ...

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