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

OPERATION CHECK

INPUT SIGNAL CHECK

(a) Connect the Techstream to the DLC3.

(b) Check the cruise control main switch using the Data List function of the Techstream (ON-OFF, -SET, +RES and CANCEL).

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INSPECT CRUISE CONTROL MAIN SWITCH (ON-OFF)

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

(b) Turn the dynamic radar cruise control system on using the cruise control main switch (ON-OFF).

(c) Check that the cruise control indicator (vehicle-to-vehicle distance control mode) in the combination meter assembly illuminates and "RADAR READY" is displayed on the multi-information display.

(d) Turn the dynamic radar cruise control system off using the cruise control main switch (ON-OFF). Check that the cruise control indicator (vehicle-to-vehicle distance control mode) in the combination meter assembly and "RADAR READY" on the multi-information display turn off.

(e) Turn the engine switch off with the cruise control indicator (vehicle-to-vehicle distance control mode) in the combination meter assembly illuminated and "RADAR READY" on the multi-information display displayed. Turn the engine switch back on (IG) and check the cruise control indicator (vehicle-to-vehicle distance control mode) in the combination meter assembly and "RADAR READY" on the multi-information display are turned off.

INSPECT MODE SELECT

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

(b) Push and hold the cruise control main switch (ON-OFF) for approximately 1.5 seconds. Check that the cruise control indicator (vehicle-to-vehicle distance control mode) in the combination meter assembly and "RADAR READY" on the multi-information display turn off and the cruise control indicator (constant speed control mode) illuminates.

(c) Check that the cruise control indicator (vehicle-to-vehicle distance control mode) in the combination meter assembly and "RADAR READY" on the multi-information display turn off and the cruise control indicator (constant speed control mode) illuminates.

NOTICE:

Do not push any other switches before pushing the cruise control main switch to MODE. If any other switch is pushed, turn the dynamic radar cruise control system off and repeat the procedure above.

HINT:

If a malfunction is detected, turn the engine switch off and repeat the procedure above.

INSPECT VEHICLE-TO-VEHICLE DISTANCE CONTROL SWITCH

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

(b) Turn the dynamic radar cruise control system on using the cruise control main switch (ON-OFF).

HINT:

When in constant speed control mode, the vehicle-to-vehicle distance cannot be changed.

(c) Press the vehicle-to-vehicle distance control switch.

(d) Check that the indicator of the vehicle-to-vehicle distance, which is shown on the multi-information display in the combination meter assembly changes from long to middle to short in that order.

HINT:

Long is automatically selected each time the engine switch is turned on (IG).