Check With SUBARU Select Monitor

CAUTION: Before performing the inspection, check the following settings .

Wiper deicer setting → "Support". If "No Support", set to "Support" using customize setting .
Rear defogger operation mode setting → initial setting or customize setting .

CHECK BODY INTEGRATED UNIT SETTING .
1. Turn the ignition switch to ON.
2. Display the [wiperdeicer] data using Subaru Select Monitor. Ref. to BODY CONTROL (DIAGNOSTICS)>DATA MONITOR .
Do the vehicle equipment and the settings of body integrated unit match?

Yes: Go to 2.

No: From the Customize item list, select [wiperdeicer] and match the wiper deicer setting to the actual vehicle equipment, Ref. to BODY CONTROL (DIAGNOSTICS)>CUSTOMIZE .

Check the input of the body integrated unit, Go to 2.
CHECK INPUT OF BODY INTEGRATED UNIT .
1. Check the operation with rear window defogger switch ON.
  - When the customize setting is "Continuous", it is normal if the operation continues for 15 minutes or more.
  - When customize setting is "Normal", it is normal if the operation lasts for 15 minutes and then turns OFF.
Does it operate properly?

Yes: Function is normal.

No: Go to 3.
CHECK BODY INTEGRATED UNIT OUTPUT SIGNAL .
Display the [wiper deicer output] data using Subaru Select Monitor, Ref. to BODY CONTROL (DIAGNOSTICS)>DATA MONITOR .

Does the display change between [OFF] ← → [ON], when the rear window defogger switch is operated?

Yes: Go to 4.

No: Replace the body integrated unit. Ref. to SECURITY AND LOCKS>BODY INTEGRATED UNIT .
CHECK BODY INTEGRATED UNIT .
Read the DTC of body integrated unit using Subaru Select Monitor. Ref. to BODY CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

NOTE: For detailed operation procedures, refer to "Application help" .

Is DTC displayed?

Yes: Perform the diagnosis according to the DTC. Ref. to BODY CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>OPERATION .

No: Go to 5.
CHECK FUSE AND RELAY .
Check the F/B fuse No. 8, M/B fuse No. 35 and wiper deicer relay. Ref. to GLASS/WINDOWS/MIRRORS>RELAY AND FUSE>INSPECTION .

Is the check result OK?

Yes: Go to 6.

No: Replace the defective fuse or relay.
CHECK HARNESS .
1. Turn the ignition switch to OFF.
2. Disconnect the connector of body integrated unit and rear window defogger switch.
3. Check the harness between body integrated unit and rear window defogger switch.
  Connector & terminal
  
  (B281) No. 4 - (B225) No. 54:
Is harness normal?

Yes: Go to 7.

No: Repair or replace the harness.
CHECK HARNESS .
1. Remove the wiper deicer relay.
2. Measure the voltage between relay holder and chassis ground.
  Connector & terminal
  
  (B225) No. 53 (+) - Chassis ground (-):
  
  (B225) No. 55 (+) - Chassis ground (-):
Is the voltage 8.5 - 16.5 V?

Yes: Go to 8.

No: Repair or replace the harness.
CHECK HARNESS .
1. Remove the wiper deicer relay.
2. Disconnect the connector of body integrated unit and wiper deicer.
3. Check the harness between relay holder and body integrated unit connector.
4. Check the harness between relay holder and wiper deicer connector.
  Connector & terminal
  
  Body integrated unit side
  
  (B225) No. 54 - (B281) No. 4:
  
  Wiper deicer side
  
  (B225) No. 56 - (B177) No. 2:
Is harness normal?

Yes: Go to 9.

No: Repair or replace the harness.
CHECK HARNESS .
Check the harness between wiper deicer connector and chassis ground.

Connector & terminal

(B177) No. 1 (+) - Chassis ground (-):

Is harness normal?

Yes: Replace the body integrated unit. Ref. to SECURITY AND LOCKS>BODY INTEGRATED UNIT .

No: Repair or replace the harness.