Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Touch Pad Sensor Malfunction (B1559)

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual / Audio & Visual & Telematics / Navigation / Multi Info Display / Navigation System / Touch Pad Sensor Malfunction (B1559)

DESCRIPTION

This DTC is stored if the remote touch (remote operation controller assembly) detects a malfunction in itself, such as internal hardware failure or remote touch screen sensor malfunction.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B1559

Touch Pad Sensor Malfunction

Internal remote touch screen sensor malfunction

Remote touch (remote operation controller assembly)

PROCEDURE

1.

CHECK DTC

(a) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

(b) Recheck for DTCs and check that no DTCs are output.

Body Electrical > Navigation System > Trouble Codes

OK:

No DTCs are output.

HINT:

  • If DTC B155B is output, perform troubleshooting for DTC B155B first.

    Click here

  • Remote touch screen touch detection is performed using the electrostatic sensor and G sensor. However, there is no effect on the basic functions of the remote touch screen when the G sensor is not operating. Therefore, a counter is used to prevent DTCs from being output immediately (in order to reduce excessive DTC output). Therefore, when DTCs are not output, it is necessary to turn the engine switch from on (ACC) to off and check for DTCs again.
OK

USE SIMULATION METHOD TO CHECK

NG

2.

REMOTE TOUCH (REMOTE OPERATION CONTROLLER ASSEMBLY) SELF CHECK (CHECK REMOTE TOUCH SCREEN OPERATION POSITION RECOGNITION CONDITION)

(a) Enter self-diagnostic mode.

Click here

(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 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.

Result

Proceed to

Brightness of the switch illumination changes according to remote touch screen operation.

A

Brightness of the switch illumination does not change according to remote touch screen operation.

B

Switch illumination continues to blink.

*a

Switch Illumination

*b

Remote Touch Screen
B

REPLACE REMOTE TOUCH (REMOTE OPERATION CONTROLLER ASSEMBLY)

A

3.

CHECK DTC

(a) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

(b) Turn the engine switch off.

(c) Turn the engine switch on (ACC) and wait for 40 seconds.

(d) Recheck for DTCs and check that no DTCs are output.

Body Electrical > Navigation System > Trouble Codes

OK:

No DTCs are output.

HINT:

Remote touch screen touch detection is performed using the electrostatic sensor and G sensor. However, there is no effect on the basic functions of the remote touch screen when the G sensor is not operating. Therefore, a counter is used to prevent DTCs from being output immediately (in order to reduce excessive DTC output). Therefore, when DTCs are not output, it is necessary to turn the engine switch from on (ACC) to off and check for DTCs again.

OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE REMOTE TOUCH (REMOTE OPERATION CONTROLLER ASSEMBLY)

    Extension Module Malfunction 2 (B1556)
    DESCRIPTION This DTC is stored when a malfunction occurs in the Navigation ECU. DTC No. Detection Item DTC Detection Condition Trouble Area B1556 Extension Module Malfunction 2 When a ...

    Touch Pad Vibration Driver Malfunction (B155A)
    DESCRIPTION This DTC is stored if the remote touch (remote operation controller assembly) detects a malfunction in itself, such as internal hardware failure or remote touch screen vibration driver mal ...

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