Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Freeze Frame Data

Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual / Engine & Hybrid System / Cruise Control / Dynamic Radar Cruise Control System / Freeze Frame Data

FREEZE FRAME DATA

CHECK FREEZE FRAME DATA

HINT:

The ECU records vehicle and driving condition information as freeze frame data the moment a DTC is stored.

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Radar Cruise 1*1 or Radar Cruise 2*2 / Trouble Codes.

Powertrain > Cruise Control > Trouble Codes Powertrain > Radar Cruise2 > Trouble Codes
  • *1: Output from the ECM
  • *2: Output from the forward recognition camera

(e) Select the DTCs (with snow icon) for which freeze frame data is recorded.

NOTICE:

The operating conditions the moment a DTC is stored are recorded as freeze frame data. Furthermore, only the latest 3 DTCs can be stored by the forward recognition camera.

LIST OF FREEZE FRAME DATA

Powertrain > Cruise Control

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Cruise Vehicle Speed

Vehicle speed

Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph)

Actual vehicle speed

-

Cruise Memory Vehicle Speed

Stored vehicle speed

Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph)

Stored vehicle speed

-

Cruise Request Throttle Opening Angle

Cruise requested position

0.00 to 124.99 deg

Changes depending on the conditions of the dynamic radar cruise control system

-

Cruise Target Acceleration

Target acceleration while in cruise control mode

-13.10 to 13.10 m/s2

Current value displayed

-

Driving Support ECU Target Acceleration

-

-

-

Cannot be used

Cruise Request Driving Force

Cruise request torque signal

-10.00 to 9.92 kN

Changes depending on the conditions of the dynamic radar cruise control system

-

Cruise Request Driving Force Feedback Status

-

-

-

Cannot be used

Cruise Control Permission Condition

-

-

-

Cannot be used

Cruise Control Condition

-

-

-

Cannot be used

Cruise Main Switch Operation Condition

Cruise control main switch status

OFF or ON

OFF: Cruise control main switch not pushed

ON: Cruise control main switch pushed

-

Accelerator Pedal

Condition of the accelerator pedal during cruising

OFF or ON

OFF: Accelerator pedal released

ON: Accelerator pedal depressed

-

Cruise Brake Cancel Switch

Cruise control brake cancel condition

OFF or ON

OFF: Brake pedal released

ON: Brake pedal depressed

-

Stop Light Switch Main-CPU

Stop light switch signal

OFF or ON

OFF: Brake pedal released

ON: Brake pedal depressed

-

Stop Light Switch Sub-CPU

-

-

-

Cannot be used

Request Manual Cancel

-

-

-

Cannot be used

Request Automatic Cancel

-

-

-

Cannot be used

Cruise Brake Control Decision

Cruise brake control decision

OFF or ON

OFF: Cruise brake deactivated

ON: Cruise brake activated

-

Cruise Brake Control Permission Condition

-

-

-

Cannot be used
Powertrain > Radar Cruise2

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Total Distance Traveled

-

-

-

Cannot be used

Total Distance Traveled - Unit

-

-

-

Cannot be used

Cruise Control Mode

Cruise control mode signal

Vehicle-to-vehicle Distance Control (All Speed), Vehicle-to-vehicle Distance Control (Hi Speed) or Constant Speed Control

Vehicle-to-vehicle Distance Control (All Speed): Vehicle-to-vehicle distance control mode (w/ Full-speed range following function)

Vehicle-to-vehicle Distance Control (Hi Speed): Vehicle-to-vehicle distance control mode (w/o Full-speed range following function)

Constant Speed Control: Constant speed mode

-

Estimated Vehicle Acceleration

Estimated Vehicle Acceleration

Min.: -5.00 m/s2, Max.: 5.00 m/s2

Current value displayed

-

Accelerator Pedal Idle

Accelerator pedal idle position signal

OFF or ON

OFF: Accelerator pedal depressed

ON: Accelerator pedal released

-

Forward Vehicle Distance

Distance to preceding vehicle

Min.: 0 m, Max.: 255 m

Current value displayed

-

Forward Vehicle Relative Speed

Relative speed against preceding vehicle

-128 to 127 km/h

Current value displayed

-

Cruise Warning Request

Forward vehicle approach warning signal

OFF or ON

OFF: Forward vehicle not approaching

ON: Forward vehicle approaching

-

Accelerator Over Ride

Accelerator pedal position signal during cruising

OFF or ON

OFF: Accelerator over ride OFF

ON: Accelerator over ride ON

-

Front Radar Sensor High Temperature

Millimeter wave radar sensor assembly high temperature abnormality

Normal or High Temperature

Normal: Millimeter wave radar sensor assembly temperature is normal

High Temperature: Millimeter wave radar sensor assembly temperature is high
  • "High Temperature" displayed when the millimeter wave radar sensor assembly is in the following condition
    • When the ambient temperature of the millimeter wave radar sensor assembly is 70°C (158°F) or more, such as when the vehicle is left alone in an extremely hot environment
  • When "High Temperature" is displayed, and the dynamic radar cruise control system is in one of the following conditions
    • X2027 in the vehicle control history (Front Radar Sensor Outside Guaranteed Operating Temperature) is stored
    • "Radar Cruise Control Unavailable" is displayed on the multi-information display
  • If "High Temperature" is displayed, refer to X2027 in the front radar sensor system vehicle control history

Front Radar Sensor Low Voltage

Millimeter wave radar sensor assembly low voltage abnormality

Normal or Low Voltage

Normal: Millimeter wave radar sensor assembly voltage is normal

Low Voltage: Millimeter wave radar sensor assembly voltage is low
  • "Low Voltage" displayed when the millimeter wave radar sensor assembly is in the following condition
    • When the input voltage is approximately 8 V or less, immediately after turning the engine switch is started
  • When "Low Voltage" is displayed, and the dynamic radar cruise control system is in one of the following conditions
    • X2028 in the vehicle control history (Front Radar Sensor Outside Guaranteed Operating Voltage) is stored
    • "Radar Cruise Control Unavailable" is displayed on the multi-information display
  • If "Low Voltage" is displayed, refer to X2028 in the front radar sensor system vehicle control history
    Dtc Check / Clear
    DTC CHECK / CLEAR NOTICE: When the diagnosis system is changed from normal mode to check mode or vice versa, all DTCs and freeze frame data recorded in normal mode are cleared. Before changing modes, ...

    Fail-safe Chart
    FAIL-SAFE CHART Automatic Cancel Control (a) When the vehicle is being driven in constant speed control mode and any of the following malfunctions occur, control of vehicle speed by the dynamic cruise ...

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