DTC    B1279    Rain Sensor Communication Stop

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DESCRIPTION

This DTC is detected when communication between the rain sensor and overhead J/B stops for more than 10 seconds.

DTC No.
DTC Detection Condition
Trouble Area
B1279
Rain sensor communication stops
  1. Rain sensor
  2. Wire harness

WIRING DIAGRAM


B079026E03


INSPECTION PROCEDURE

1.CHECK RESISTANCE OF COMMUNICATION LINE
B111325E03

  1. Disconnect the Y4 sensor connector.

  1. Disconnect the Y7 junction block connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    Y4-1 (SIG) - Y7-10 (IG2)
    		Below 1 Ω
    Y4-2 (MPX) - Y7-9 (MPX1)
    		Below 1 Ω
    Y4-3 (ES) - Y7-17 (GND2)
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE RAIN SENSOR