Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Rain Sensor Malfunction (B1400)

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual / Vehicle Exterior / Wiper / Washer / Wiper And Washer System / Rain Sensor Malfunction (B1400)

DESCRIPTION

This DTC is stored when the rain sensor detects an internal malfunction.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

DTC Output from

B1400

Rain Sensor Malfunction
  • When the battery voltage is 9.5 V or more, the rain sensor temperature is abnormal for 10 seconds or more.
  • When the battery voltage is 9.5 V or more, the output of the LED built into the rain sensor is abnormal for 2 seconds or more.

Rain Sensor

○

Rain Sensor

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs.

Click here

Body Electrical > Rain Sensor > Clear DTCs
NEXT

2.

CHECK FOR DTC

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

(b) Check for DTCs.

Click here

Body Electrical > Rain Sensor > Trouble Codes

Result

Proceed to

DTC B1400 is not output.

A

DTC B1400 is output.

B
A

USE SIMULATION METHOD TO CHECK

B

REPLACE RAIN SENSOR

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