Check With SUBARU Select Monitor

1. Turn the ignition switch to ON.
2. Read DTCs of the following items using the Subaru Select Monitor. Ref. to LAN SYSTEM (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

• [Body Control]
• [Front Relay Control Module]

Is DTC displayed?

Yes:  Perform a check according to the DTC.

No:  Go to  2.

1. Display the data of [BATT Voltage (Control)], [BATT Voltage (BACKUP)] and [IGN Voltage] for [Front Relay Control Module] using Subaru Select Monitor.
2. Display the data of [BATT voltage (control)], [BATT voltage (BACKUP)] and [IGN voltage] for [Body Control] using Subaru Select Monitor.

Is the voltage 9 - 16 V?

Yes:  Go to  3.

No:  Check the harnesses of the battery, fuse, connector and power supply circuit. If there is no abnormality, replace the front relay control module or the body integrated unit.

Check the setting of [Auto A/C Setting].

Is it set to [Support]?

Yes:  Go to  4.

No:  Change the customize setting to [Support].

Check the rear defogger system operation. Ref. to FRONT RELAY CONTROL MODULE (DIAGNOSTICS)>ACTIVE TEST .

Does the rear defogger system operate normally?

Yes:  Go to  5.

No:  Check the harnesses of the heat wire, relay and output circuit. If there is no abnormality, replace the front relay control module.

Using Subaru Select Monitor, display [Rr Defogger SW]. Ref. to BODY CONTROL (DIAGNOSTICS)>DATA MONITOR .

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

Yes:  Go to  8.

No:  Go to  6.

1. Switch to dealership mode. Ref. to COCKPIT CONTROL (DIAGNOSTICS)>DEALERSHIP MODE>OPERATION>PROCEDURE TO SWITCH TO DEALERSHIP MODE .
2. Select [Function Check]. Ref. to COCKPIT CONTROL (DIAGNOSTICS)>DEALERSHIP MODE>OPERATION>SERVICE INSPECTION .
3. Check [Rr DEF] and [Push] are displayed when the rear defogger switch is pressed.
4. Check [Push] is switched to [Release] when the rear defogger switch is released.

Does it operate normally?

Yes:  Go to  7.

No:  Inspect the rear defogger switch and input circuit.

1. Turn the ignition switch to ON.
2. Read the DTC of [Cockpit Control] using the Subaru Select Monitor. Ref. to COCKPIT CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

Is DTC detected?

Yes:  Perform a check according to the DTC.

No:  Go to  8.

Using Subaru Select Monitor, display [R Defogger Output]. Ref. to FRONT RELAY CONTROL MODULE (DIAGNOSTICS)>DATA MONITOR .

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

Yes:  Replace the front relay control module.

No:  Replace the body integrated unit.