Code No.B1950 Rain sensor error
Code No.B1951 Light sensor error



caution
  • Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.

DIAGNOSTIC FUNCTION


When the LDW-ECU detects a fault in the LDW-ECU (rain sensor or light sensor), diagnosis code No. B1950 or B1951 will be stored.

JUDGEMENT CRITERIA


When the LDW-ECU detects a fault in the LDW-ECU (rain sensor or light sensor), it will determine that the system is defective.

PROBABLE CAUSES




DIAGNOSIS PROCEDURE


STEP 1. Check whether the diagnosis code is reset.


Check if the diagnosis code No. B1950 or B1951 is set to LDW-ECU.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from the LOCK (OFF) position to the ON position.
(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?

Replace the LDW-ECU.

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).