Checking The Supply To The Rain Sensor

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS CORPORATION

• A number of measurements are required to check the wiring for the rain sensor. Measurements should be carried out on the wiring connector with the rain sensor disconnected. The terminals correspond to ground, voltage and data cables. The data cable is connected to terminal #1 on the rain sensor, terminal #2 is the ground cable and terminal #3 is the power supply for the rain sensor
• Move the windshield wiper stalk to position "0".
• Ignition off
• Disconnect the rain sensor
• Ignition on.

  Check the voltage level between the voltage terminal #3 and ground terminal #2 of the wiring.

  HINT: The voltage must be 12V. 

  Other information: 

  • For further information about signals and other values, see SIGNAL DESCRIPTION, UPPER ELECTRONIC MODULE (UEM)
  • see RAIN SENSOR
  • see CHECKING WIRING AND TERMINALS .
  Fig 2: Identifying 10 Pin Connector Terminals

  Courtesy of VOLVO CARS CORPORATION
  Fig 3: Identifying Connector Terminals

  Courtesy of VOLVO CARS CORPORATION

Is the voltage between the terminals 12 V? 

• YES 

  Refer to CHECKING THE DATA CABLE 

• NO 

  Refer to CHECKING THE WIRING