Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Switch Lights of Remote Touch do not Illuminate

1.

CHECK SYMPTOMS

(a) Perform the following procedure and check the switch illumination again.

(1) If the vehicle is in a bright area, move it to a dark area.

HINT:

When the vehicle is in a bright area, the switch illumination may not turn on due to the automatic dimmer function.

(2) Set the rheostat to maximum brightness.

HINT:

If the brightness of the rheostat is set to low, switch illumination may not be recognized even when the switch illumination turns on.

(3) If the light control switch is in the AUTO position, turn the switch to the tail or head position.

HINT:

If the light control switch is in the AUTO position, the switch illumination will not turn on unless the surrounding area is dark.

OK:

Switch illumination turns on.

END

2.

REMOTE TOUCH (REMOTE OPERATION CONTROLLER ASSEMBLY) SELF CHECK (SWITCH ILLUMINATION CHECK)

(b) Operate the remote touch screen diagonally from the upper left to the lower right and check that the brightness of the switch illumination changes.

NOTICE:

Since the remote touch screen may recognize a pinch in/out or flick operation if operated with 2 fingers, always use 1 finger to operate the remote touch screen in self-diagnostic mode.

OK:

Brightness changes according to remote touch screen operation.

REPLACE REMOTE TOUCH (REMOTE OPERATION CONTROLLER ASSEMBLY)

3.

CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL CIRCUIT)

J154-2 (ILL+) - Body ground

Light control switch in tail or head position

11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.

CHECK HARNESS AND CONNECTOR (REMOTE TOUCH (REMOTE OPERATION CONTROLLER ASSEMBLY) - COMBINATION METER ASSEMBLY)

J154-5 (ILL-) - J10-39 (ILL-)

Always

Below 1 Ω

J154-5 (ILL-) or J10-39 (ILL-) - Body ground

Always

10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.

REPLACE REMOTE TOUCH (REMOTE OPERATION CONTROLLER ASSEMBLY)

END

GO TO METER / GAUGE SYSTEM