Wiper Switch: Testing and Inspection

Combination Switch (Wiper)

INSPECTION

1. COMBINATION SWITCH







1. Inspect the continuity between each connector terminal.
2. If continuity is not as specified, replace the switch.

2. FRONT WIPER

Step 1:

1. Check with Subaru Select Monitor
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

Intermittent stationary time specification
MIN: Approx. 4 seconds
MAX: Approx. 21seconds

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.
If operation is not as specified, replace the switch.




2. CHECK VEHICLE SPEED SIGNAL.
Raise the vehicle speed to more than 10 km/h (6 mph), then measure the voltage between the wiper switch connector and the chassis ground.




3. CHECK THE VEHICLE SPEED SIGNAL HARNESS.
Measure the resistance between the wiper switch connector and the VDC control module.

3. REAR WIPER

Step 1-2:

1. Check with Subaru Select Monitor

Step 1-4:

2. Check rear wiper motor circuit