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]
• [Cockpit control]
• [Air Conditioner]

Is DTC displayed?

Yes:  Perform a check according to the DTC.

No:  Go to  2.

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

Is it set to [Support]?

Yes:  Go to  3.

No:  Change the customize setting to [Support].

Operate the rear defogger switch on the center information display.

Does the rear defogger switch light illuminate or go off corresponding to the switch operation?

Yes:  Go to  4.

No:  Go to  8.

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  5.

No:  Check the harnesses of the battery, fuse, connector and power supply circuit.

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  6.

No:  Check the harnesses of the heat wire, relay and output circuit.

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:  Go to  7.

Using Subaru Select Monitor, display [Rr Defogger output]. Ref. to COCKPIT CONTROL (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.

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:  The circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the inspection again.

No:  Replace the center information display.