WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.

On Service Menu, click "Connection" to display the following items.

OK: Each connection device is connected properly.

NG: Connection is not established, or connection status (including harness) is faulty.

NOTE:

Check the external connection terminals (USB 1, USB 2 and AUX) by connecting memory or a pin jack for inspection.

Check the connection status of the connector and harness. If there are no problems, the connection device or unit could be faulty.

The following shows information to be displayed and its description.

Item	Item detection method	OK judgment condition	Note
GPS	Direct line	GPS antenna is connected. (NG is displayed when short circuit is detected.)	-
MIC	Direct line	MIC is connected.	-
CAM	Direct line	NTSC camera is connected.	-
AUX	Direct line	AUX is connected.	-
USB1	Communication	USB device is connected to USB-HUB to obtain USB device information properly. (Should be recognizable as a supported USB device.)	If the device (iPhone, etc.) connected via USB is used as a host, USB connected devices are not detected. Therefore, connection status is displayed as "NG". When checking USB connection, make sure that the connected device is not used as a host. (For example, do not check connection when Car Play connection or STARLINK auto connection is "ON".) If the device (iPhone, etc.) connected via USB is used as a host, USB1 and USB2 may be switched with each other. If the connected device is used as host, it is necessary to turn the ignition switch to OFF and then back to ON and check USB connection.
USB2	Communication	USB device is connected to USB-HUB to obtain USB device information properly. (Should be recognizable as a supported USB device.)
DCM	Communication	USB communication with DCM can be executed normally.	-
Leather AMP	Communication	CAN communication with external AMP can be executed normally.	-
SXM	Direct line	XM-ANT is connected. (NG is displayed when short circuit is detected.)	It takes approx. 30 seconds to become recognizable.
CAN	Communication	CAN communication is completed properly.	-
Meter	Communication	LVDS communication with the combination meter can be executed normally.	-
CID	Communication	LVDS communication with the center information display can be executed normally.	-
Deck	Communication	USB communication with CD deck can be executed normally.	-

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Service Inspection: Connection

Use the Manual With the Right Hardware

When to See a Mechanic

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