Toyota Yaris: Wiper And Washer System / Rain Sensor Malfunction (B1400)

Toyota Yaris XP210 (2020-2024) Reapir and Service 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

  • IG power source voltage is 9.5 V or more
  • Either of the following is detected
    • Rain sensor internal thermistor malfunction detected for 10 seconds or more
    • LED output malfunction detected for 2 seconds or more

Rain sensor

Rain and/or Humidity Sensor

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Rain and/or Humidity Sensor > Clear DTCs
NEXT

2.

CHECK FOR DTC

(a) Wait 10 seconds or more.

(b) Check for DTCs.

Body Electrical > Rain and/or Humidity 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

    Humidity/Rain Sensor Missing Message (B127987)

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    Wiper Module Missing Message (B235787)

    DESCRIPTION The main body ECU (multiplex network body ECU) and windshield wiper relay assembly communicate via CXPI communication. The main body ECU (multiplex network body ECU) stores this DTC if communication becomes abnormal...

    Other information:

    Toyota Yaris XP210 (2020-2024) Reapir and Service Manual: Dtc Check / Clear


    DTC CHECK / CLEAR NOTICE: When the diagnosis system is changed from normal mode to check mode or vice versa, all DTCs and Freeze Frame Data recorded in normal mode are cleared. Before changing modes, always check and make a note of DTCs and Freeze Frame Data...

    Toyota Yaris XP210 (2020-2024) Reapir and Service Manual: Terminals Of Ecu


    TERMINALS OF ECU NOTICE: After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work...

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