Front Wiper

Check with Subaru Select Monitor
1. Check the input signal when the front wiper switch is turned to LO or HI, using the current data display of body integrated unit.
2. Does the input signal change corresponding to the switch operation?
- Yes → Finish the diagnosis.
- No →
  1. Check the harness.
  2. Check the input voltage of body integrated unit.
    Connector & terminal
    
    (B280) No. 2 (+) - Chassis ground (-):
  3. Replace the body integrated unit. < Refer to BODY INTEGRATED UNIT . >
Check the intermittent operation (inspection of the wiper switch alone).

Fig 1: Identifying Wiper Combination Switch Connector Terminals
Courtesy of SUBARU OF AMERICA, INC.
1. Set the voltmeter between terminals No. A3 (+) and No. B2 (-).
2. Connect the battery to connector. (Terminal No. A3 (+), terminal No. A2 & B2 (-))
3. Turn the front wiper switch to INT.
4. Connect the battery (+) to the terminal No. A3 for 5 seconds.
5. Connect the battery (-) to the terminal No. B2, and check the voltage between terminals No. A3 and No. A2 during intermittent operation.
6. Perform step ( 1) to ( 5) above when intermittent control switch is in MIN or MAX, and replace the switch if the operation is not as specified.
  Intermittent stationary time
  
  MIN: Approx. 2 seconds
  
  MAX: Approx. 16 seconds
  
  Fig 2: Intermittent Stationary Timing Pattern
  Courtesy of SUBARU OF AMERICA, INC.