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Front Wiper

WARNING: This page is about a different car, the 2011 Subaru Tribeca. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check with Subaru Select Monitor

    When the front wiper switch is operated, check the input signal using the Subaru Select Monitor.

    1. Prepare the Subaru Select Monitor kit. Refer to PREPARATION TOOL , General Description.
    2. Turn the ignition switch to ON (engine OFF) and run the "PC application for Subaru Select Monitor".
    3. On the «System Selection Menu» display screen, select the {Integ. Unit mode}.
    4. Select the {Current Data Display & Save}.
    5. Check the input signal when the front wiper switch is set to LO or HI.
      INPUT SIGNAL REFERENCE CHART

      Check Yes No
      Is the input signal normal? Finish the diagnosis. Replace the body integrated unit. Refer to BODY INTEGRATED UNIT .
  2. Check the intermittent operation (inspection of the wiper switch alone)
    1. Set the voltage meter between connector terminal No. 7 (+) and No. 2 (-).
    2. Connect the battery between connector terminal No. 7 (+) and No. 2 (-).
    3. Turn the wiper switch to INT.
    4. Connect the battery ground terminal to the connector terminal No. 16 for five seconds.
    5. After connecting the battery ground terminal for five seconds in step ( 4), connect the battery positive terminal to the connector terminal No. 16 for five seconds.
    6. After connecting the battery ground terminal and the battery positive terminal to the connector terminal No. 16 for five seconds each in step ( 4) and ( 5), connect the ground terminal to the connector terminal No. 16 again.
    7. Perform the step ( 1) to ( 6) above at MIN and MAX position of the intermittent control switch. If operation is not as specification, replace the wiper switch assembly.
      Fig 1: Intermittent Control Switch Operation Chart
      G05336825Courtesy of SUBARU OF AMERICA, INC.
  3. Inspect the vehicle speed response (With the wiper switch installed on the vehicle)
    1. Operational check

      Position the front wiper switch to INT, then measure the intermittent stationary time at each vehicle speed.

      INTERMITTENT STATIONARY TIME REFERENCE CHART

      Switch position Vehicle speed (km/h (MPH)) Intermittent stationary time (sec.)
      MIN. 0 (0) Approx. 4
      30 (19) Approx. 1.5
      60 (37) Approx. 1
      MAX. 0 (0) Approx. 21
      30 (19) Approx. 19.5
      60 (37) Approx. 18

      If operation is not as specified, replace the switch.

    2. Check vehicle speed signal

      Raise the vehicle speed to 10 km/h (6 MPH) or more, then measure the voltage between the wiper switch connector and the chassis ground.

      Terminals 

      No. 15 (+) - Chassis ground (-): 

      VEHICLE SPEED SIGNAL REFERENCE CHART

      Check Yes No
      Does the voltage repeat 12 V and 0 V? Vehicle speed signal is normal. Replace the wiper switch.
    3. Check the vehicle speed signal harness Measure the resistance between the wiper switch connector and the VDC control module.

      Terminals 

      Wiper switch connector No. 15 - VDC control module No. 10: 

      VEHICLE SPEED SIGNAL REFERENCE CHART

      Check Yes No
      Is the resistance 0 Ω? Replace the wiper switch. Repair the harness.
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