Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Precaution

PRECAUTION

PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL

NOTICE:

When disconnecting the cable from the negative (-) battery terminal, initialize the following system(s) after the cable is reconnected.

TROUBLESHOOTING PRECAUTION

(a) When there is a malfunction with terminal contact points or part installation problems, removal and installation of the suspected parts may return the system to normal either completely or temporarily.

(b) Before disconnecting a connector or removing and installing a component in order to narrow down the malfunctioning part, make sure to perform the following procedure.

NOTICE:

Before disconnecting connectors or fuses, turn the engine switch off and wait 20 seconds or more*.

(c) Since the system may be influenced by malfunctions in systems other than the vehicle stability control system, be sure to check for DTCs in other systems.

HANDLING PRECAUTION

(a) Always ensure that the engine switch is off before removing the brake actuator assembly or a sensor unless specifically instructed by the repair manual.

(b) When replacing the brake actuator assembly, always replace it with a new one.

NOTICE:

Never use a brake actuator assembly from another vehicle, including new vehicles.

(c) If the brake actuator assembly or a sensor has been removed and installed, always perform a Dealer Mode (Signal Check) inspection and check for DTCs after completion of installation to confirm that the system is operating correctly.

(d) Do not remove and install any vehicle stability control system components not specified by the repair manual or the system may not operate correctly due to loss of calibration.

(e) When performing diagnosis and repair for the vehicle stability control system, follow all specified procedures and perform the necessary inspections after completion.

DTC PRECAUTION

(a) If the warning lights are illuminated due to a malfunction, the warning lights will only turn off for some DTCs when the malfunction is repaired and the DTCs are cleared.

(b) If a warning lights are illuminated, it is necessary to follow the procedure to turn off the warning lights.

CHASSIS DYNAMOMETER PRECAUTION

When testing with a 2-wheel drum tester such as a speedometer tester, combination tester for the speedometer and brakes, or chassis dynamometer, or when jacking up the front wheels and turning the wheels, perform the following procedure to enter Inspection Mode and disable the TRAC and VSC systems.

NOTICE:

Secure the vehicle with lock chains for safety.

HINT:

If Inspection Mode is not used, the vehicle may unexpectedly move off the dynamometer because of TRAC and VSC operation.

(a) Activating Inspection Mode (When Using the Techstream)

(1) Ensure that the engine switch is off and the engine is stopped.

(2) Connect the Techstream to the DLC3.

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

(4) Turn the Techstream on.

(5) Enter the following menus: Chassis / Brake/EPB / Utility / Inspection Mode.

(6) Check that the VSC OFF indicator light come on and the TRAC OFF message will be displayed on the multi-information display.

NOTICE:

Turn the engine switch off when 60 seconds or more have elapsed since Inspection Mode was entered. If the engine switch is turned off before 60 seconds or more elapse, Inspection Mode continues when the engine switch is turned on (IG).

(b) Activating Inspection Mode (When not Using the Techstream)

HINT:

Perform steps "C" to "G" within 30 seconds.

(1) Ensure that the engine switch is off and the engine is stopped (Step "A").

(2) Release the parking brake (Step "B").

(3) With the brake pedal depressed, start the engine (Step "C").

(4) While holding the brake pedal down, apply the parking brake (Step "D").

(5) With the parking brake applied, depress and release the brake pedal twice (Step "E").

(6) While holding the brake pedal down, release and apply the parking brake twice (Step "F").

(7) With the parking brake applied, depress and release the brake pedal twice (Step "G").

(8) Check that the VSC OFF indicator light comes on and the TRAC OFF message is displayed on the multi-information display (Step "H").

NOTICE:

Turn the engine switch off when 60 seconds or more have elapsed since Inspection Mode was entered. If the engine switch is turned off before 60 seconds or more elapse, Inspection Mode continues when the engine switch is turned on (IG).