Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: Vehicle Control History

VEHICLE CONTROL HISTORY

DESCRIPTION

  • Vehicle Control History is a function that captures and stores ECU data when triggered by specific vehicle behavior.
  • It may be possible to determine the cause of the malfunction by checking the vehicle history information and freeze frame data.
  • The number of possible stored Freeze Frame Data sets, whether multi Freeze Frame Data is available, the number of freeze frame points, Freeze Frame Data items, the ECU internal range, etc., is different depending on the stored group.
  • The stored data items for Vehicle Control History Freeze Frame Data are different depending on the stored group. When the value of a data item does not change across all points, only the value of the detection point will be displayed. The contents of the Freeze Frame Data is almost the same as that of the Data List.

    Click here

PRECAUTIONS

  • As Vehicle Control History may be overwritten whenever the trigger conditions are met, make sure to save Vehicle Control History before performing any inspections.
  • As Vehicle Control History may be stored when performing an Active Test, learning, etc., make sure to clear the Vehicle Control History before returning the vehicle to the customer.

CHECK VEHICLE CONTROL HISTORY (VEHICLE STABILITY CONTROL SYSTEM AND ELECTRIC PARKING BRAKE SYSTEM)

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

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

(d) Turn the Techstream on.

(e) Enter the following menus: Chassis / Brake/EPB / Utility / Vehicle Control History (RoB).

Chassis > Brake/EPB > Utility

Tester Display

Vehicle Control History (RoB)

Vehicle Control History Item

Code

Tester Display

Measurement Item

User Notification

Diagnostic Note

X204C

Zero Point Calibration of Yaw Rate Sensor Undone

History of incomplete yaw rate sensor zero point calibration

  • Slip indicator light illuminates
  • Brake hold operated indicator light blinks*

Refer to Zero Point Calibration of Yaw Rate Sensor Undone (X204C).

X2079

Communication Error from Brake Control Module to Engine Control Module

History of being unable to send data to the ECM continuously for 2 seconds or more

  • Slip indicator light illuminates
  • Brake hold operated indicator light blinks*
Refer to the following diagnosis procedure:
  1. Using the Techstream, perform a Health Check.
  2. Refer to the flow chart(s) for the output DTCs.

X2085

Electric Parking Brake Control Module Malfunction

History of receiving an electric parking brake system malfunction signal continuously for 1 second or more from the skid control ECU (brake actuator assembly)

Brake hold operated indicator light blinks*

Refer to How to Proceed with Troubleshooting in Electric Parking Brake System.

X2086

SRS Airbag Malfunction

History of receiving an abnormal secondary collision brake control request signal from airbag sensor assembly

-

X2087

Engine Malfunction

History of receiving an SFI system malfunction signal continuously from the ECM for 1 second or more

  • Slip indicator light illuminates
  • Brake hold operated indicator light blinks*

Refer to How to Proceed with Troubleshooting in SFI System.

X2088

Bank Angle Detected

History of VSC operation being temporarily prohibited when driving at a steep bank angle, etc.

  • Slip indicator light illuminates
  • Brake hold operated indicator light blinks*

HINT:

Explain that VSC operation was temporarily prohibited when driving on a road with a steep bank angle, etc.

X208A

Zero Point Calibration of Steering Angle Sensor Initialization Malfunction

History of being unable to obtain the steering angle zero point after driving at a vehicle speed exceeding 15 km/h (9 mph) for 0.05 seconds or more

  • Slip indicator light illuminates
  • Brake hold operated indicator light blinks*
Refer to the following diagnosis procedure:
  1. Perform steering angle sensor zero point calibration.

X208B

EPB Motor Continuous Operation Request

History of system suspended to prevent overheat of parking brake actuator assembly when electric parking brake was used repeatedly

Brake hold operated indicator light blinks*

HINT:

  • EPB: Electric Parking Brake System
  • Explain that system was suspended to prevent overheating of parking brake actuator assembly when electric parking brake was used repeatedly.

X2096

Pre-Collision Brake

History of pre-collision brake operation

In accordance with Pre-collision System behavior

-

X2098

Pre-Collision Brake Assist

History of pre-collision brake assist operation

In accordance with Pre-collision System behavior

-

X20A0

ABS

History of ABS operation

-

-

X20A1

VSC

History of VSC operation

Slip indicator light blinks

-

X20A2

TRC(TRAC)

History of TRAC operation

Slip indicator light blinks

-

X20A3

High Power Assist Brake

History of high power assist brake operation

-

-

X20A4

Booster Failure Control

History of control failure operation

Brake system warning light (red indicator) illuminates

-

X20A5

Hill Start Assist

History of hill start assist operation

-

-

X20A7

Brake Assist

History of brake assist operation

-

-

X20A8

Secondary Collision Brake

History of secondary collision brake operation

-

-

X20D7

Zero Point Calibration of Steering Angle Sensor Malfunction

History of the steering angle sensor zero point calibration position differing from the stored value

  • Slip indicator light illuminates
  • Brake hold operated indicator light blinks*

Refer to Zero Point Calibration of Steering Angle Sensor Malfunction (X20D7).

X20D8

Zero Point Calibration of Steering Angle Sensor Not Acquired

History of being unable to obtain the steering angle zero point

  • Slip indicator light illuminates
  • Brake hold operated indicator light blinks*

Refer to Zero Point Calibration of Steering Angle Sensor Not Acquired (X20D8).

X219C

EPB Lock Control Run

History of abnormal electric parking brake operation

Brake system warning light (yellow indicator) illuminates

Refer to How to Proceed with Troubleshooting in Electric Parking Brake System.

HINT:

EPB: Electric Parking Brake System

HINT:

*: When the vehicle is put into the following vehicle conditions and the brake hold switch (electric parking brake switch assembly) is turned on, the brake hold operation light blinks.

  • Conditions required for operation standby:
    1. The driver side door is closed.
    2. The driver side seat belt is fastened.

CLEAR VEHICLE CONTROL HISTORY (VEHICLE STABILITY CONTROL SYSTEM AND ELECTRIC PARKING BRAKE SYSTEM)

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

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

(d) Turn the Techstream on.

(e) Enter the following menus: Chassis / Brake/EPB / Utility / Vehicle Control History (RoB).

Chassis > Brake/EPB > Utility

Tester Display

Vehicle Control History (RoB)

(f) Press the DTC clear button.

NOTICE:

By performing this procedure, all stored Vehicle Control History items will be cleared.

CHECK VEHICLE CONTROL HISTORY (AIRBAG SYSTEM)

HINT:

A part of the control history can be confirmed using the vehicle control history.

Click here

    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 pa ...

    Brake Pedal Switch "A" Circuit Open (C004013)
    DESCRIPTION The brake pedal load sensing switch signal turns on when the brake pedal is depressed with a force exceeding a predetermined level. The skid control ECU (brake actuator assembly) uses this ...

    Other materials:

    Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual > Air Conditioning System: Blower Motor Circuit
    DESCRIPTION The blower motor with fan sub-assembly is operated by signals from the air conditioning amplifier assembly. Blower motor speed signals are transmitted in accordance with changes in the duty ratio. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to t ...

    Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual > Wiper And Washer System: Precaution
    PRECAUTION PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL NOTICE: When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected. System Name See Procedure Lane Control System Pre-collision Sys ...

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

    © 2022 Copyright www.lexusrx.net
    0.0175