System Is Reset

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.

Probable cause:

Influence by external devices, power supply circuit malfunction, unit body malfunction

Wiring diagram:

Audio and navigation system Ref. to WIRING SYSTEM>AUDIO AND NAVIGATION SYSTEM>WIRING DIAGRAM

CAUTION:

Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to COCKPIT CONTROL (DIAGNOSTICS)>GENERAL DESCRIPTION>CAUTION

CHECK OPERATION PROCEDURE .
Ask how the user operates when the system is reset, and perform using the same procedure.

Is the check result OK?

Yes : Currently no failure is found.

No : Go to 2.
CHECK SOFTWARE VERSION .
Check the firmware of the cockpit control module.

Is the firmware the latest?

Yes : Go to 3.

No : Update the firmware to the latest and reproduce the failure, and then perform the diagnosis again.
CHECK BATTERY .
Check the battery. Ref. to STARTING/CHARGING SYSTEMS (H4DOTC)>BATTERY>INSPECTION

Is the check result OK?

Yes : Go to 4.

No : Charge or replace the battery.
CHECK ENVIRONMENTAL CONDITION .
Check if any external devices which emit strong electromagnetic waves and noises, such as a radio antenna, is installed inside the vehicle.

Is the check result OK?

Yes : Go to 5.

No : After executing the specified work, Go to 5.
CHECK CONNECTOR CONNECTION .
Check that the connector is connected to the unit.

Is the check result OK?

Yes : Go to 6.

No : Connect the connector.
CHECK CONNECTOR .
Check for poor contact of connectors or terminals.

Is the check result OK?

Yes : Go to 7.

No : Repair or replace the harness.
CHECK POWER SUPPLY VOLTAGE .
1. Turn the ignition switch to ACC.
2. Using the tester, measure the voltage between cockpit control module connector (i102) and chassis ground.
  NOTE:
  Turn the electrical parts to OFF.
  
  Connector & terminal
  
  (i102) No. 3 (+) - Chassis ground (-):
  
  (i102) No. 4 (+) - Chassis ground (-):
Is the voltage 10 V or more?

Yes : Go to 8.

No : Repair or replace the open circuit of harness.
CHECK OPEN CIRCUIT IN HARNESS (POWER SUPPLY) .
Using the tester, measure the voltage between cockpit control module connector (i102) and chassis ground while shaking the harness.

Connector & terminal

(i102) No. 3 (+) - Chassis ground (-):

(i102) No. 4 (+) - Chassis ground (-):

Is the voltage 10 V or more?

Yes : Go to 9.

No : Repair or replace the open circuit of harness.
CHECK OPEN CIRCUIT IN HARNESS (GROUND) .
Using the tester, measure the resistance between cockpit control module connector (i102) and chassis ground while shaking the harness.

Connector & terminal

(i102) No. 7 - Chassis ground:

Is the resistance 1 Ω or less?

Yes : Go to 10.

No : Repair or replace the open circuit of harness.
CHECK UNIT OPERATION .
1. Connect all connectors.
2. Turn the ignition switch to ACC and the power supply switch of the unit to ON.
Is the reset eliminated?

Yes : Currently no failure is found.

No : Replace the cockpit control module. Ref. to ENTERTAINMENT & MONITORING>COCKPIT DISPLAY