Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Calibration

HINT:

• With "All Readiness", you can check whether or not the DTC judgment has been completed by using the Techstream.
• You should check "All Readiness" after simulating malfunction symptoms or for validation after finishing repairs.

NOTICE:

• After replacing the skid control ECU (brake actuator assembly), perform "Calibration".
• If the yaw rate and acceleration sensor (airbag sensor assembly) was replaced or reinstalled, perform "Calibration". (for Optitron Meter Type)
• If the yaw rate and acceleration sensor was replaced or reinstalled, perform "Calibration". (for TFT Meter Type)
• Perform "Calibration" with the vehicle on a level surface (within 0.25° gradient). Do not vibrate the vehicle or open or close doors during zero point calibration. To avoid vibrations due to idling, do not start the engine.
• Perform "Calibration" with the tires at the specified air pressures and all 4 wheels in contact with the ground. (Do not perform with the vehicle lifted up or load applied on lift.)

HINT:

• When entering Dealer Mode (Calibration), the skid control ECU communicates with the forward recognition camera to judge whether the vehicle is equipped with the pre-collision system. Therefore, do not exit Dealer Mode (Calibration) within 5 seconds of entering Dealer Mode (Calibration).
• Performing the following procedure will perform the yaw rate and acceleration sensor zero point calibration and store system information simultaneously.
• If yaw rate and acceleration sensor zero point calibration do not complete normally, the slip indicator light illuminates and a DTC is output.

HINT:

• When "Calibration" completes normally, the ABS warning light and slip indicator light are in Dealer Mode (Calibration) display (blinking at 0.25-second intervals).
• The slip indicator light may illuminate for approximately 7 seconds until "Calibration" completes normally.
• When entering Dealer Mode (Calibration), if the parking brake is engaged, the parking brake indicator light (red) will illuminate, and if the parking brake is not engaged, the parking brake indicator light (red) will blink in the Dealer Mode pattern (blinking at 0.25 seconds intervals).
• Do not exit Dealer Mode (calibration) within 5 seconds of entering Dealer Mode (Calibration). If Dealer Mode (calibration) is exited within 5 seconds of entering Dealer Mode (calibration), DTC U023A87 may be stored. If DTC U023A87 is output after exiting Dealer Mode (Calibration), enter Dealer Mode (Calibration) again, wait at least 5 seconds, then recheck for DTCs.

NOTICE:

• If the engine switch is turned on (IG) for more than 15 seconds with the shift lever in P after the zero point of the yaw rate and acceleration sensor has been cleared, only the zero point of the yaw rate sensor will be stored. If the vehicle is driven under these conditions, the skid control ECU (brake actuator assembly) will store the zero point calibration for the acceleration sensor as not being completed. The skid control ECU (brake actuator assembly) will then also indicate this as a malfunction of the vehicle stability control system using the indicator light.
• When the vehicle is driven with the zero point cleared, the yaw rate and acceleration sensor zero point calibration incomplete DTC is stored.

How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT HINT: *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT 2. CUSTOMER PROBLEM ANALYSIS (a) Interview the customer and confir ...

Check For Intermittent Problems

CHECK FOR INTERMITTENT PROBLEMS CHECK FOR INTERMITTENT PROBLEMS HINT: A momentary interruption (open circuit) in the connectors and/or wire harness between the sensors and ECUs can be detected using t ...

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